Knowledge check.

- Choose one best answer from given 4 choices for each questions.
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Question Number 1

The following program is used to compare two strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == '\0')
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (flag == '\0')

while (a[count] == b[count])

if (a[count] == '\0' && b[count] == '\0')

No change needed, program will give the correct output.

Question Number 2

Which of the following operators in C has the lowest precedence?

Question Number 3

Give the output of the following code snippet :

void func(int a)
{
    a=200;
    printf("%d",a);
}
void main()
{
    printf("%d ",a);

}

200

No output

Compilation error

Question Number 4

The following program is used to add two complex numbers by passing structure to a function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    return(temp);
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
}

temp = Add(n1, n2);

temp.imag = n1.imag + n2.imag;

return(temp);

No change needed, program will give the correct output.

Question Number 5

What is the output of the mathematical function sin(x)?

sine of x where x is in radians

sine of x where x is in degree

cosine of x where x is in radians

cosine of x where x is in degree

Question Number 6

The following program is used to find length of a string without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    count++;
    return count;
}

while (s[count] != 1)

while (s[count] != count +1)

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 7

What type of argument needs to be passed to the getc() function in C?

int

char

string

file pointer.

Question Number 8

In printf function in C, which is the format specifier used to print hexadecimal values?

Question Number 9

The following program is used to display the student details using structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

struct student stud;

struct student stud[10];

structure student stud[10];

No change needed, program will give the correct output.

Question Number 10

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);
    reverse[d] = '\0';

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[d] = str[count];

    printf("%s\n", reverse);
    return 0;
}

scanf("%s",str);

strlength = strlen(str);

reverse[d] = '\0';

No change needed, program will give the correct output.

Question Number 11

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?



int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[d] = str[count];

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

string.h

stringlen.h

stringlength.h

No change needed, program will give the correct output.

Question Number 12

The following program is used to find length of a string without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    if (s[count] != '\0')
        count++;

    return count;
}

if (s[count] != '\0')

length = string_length(str);

scanf("%s", str);

No change needed, program will give the correct output.

Question Number 13

The following program is used to generate the palindrome of a number. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;
    reverse = reverse * 10;

    while (num != 0)
    {
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = value;

reverse = reverse * 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 14

Give the output of the following code snippet :

void main()
{
    int k = 8;
    int m = 7;
    int z = k <  m ? k = m : m++;
    printf("%d", z);
}

No output

Compiler error

Question Number 15

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s != '\0')
        count++;

    return count;
}

while (s != '\0')

length = string_length(str);

scanf("%s", str);

No change needed, program will give the correct output.

Question Number 16

Give the output of the following code snippet :

void main()
{
    int x=1,y=2;
    int a=x&y;
    int b=x&&y;
    printf("%d %d",a,b);
}

0 1

0 0

1 0

1 1

Question Number 17

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] == '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

while (str1[count] == '\0')

while (str2[d] != '\0')

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 18

In printf function in C, which is the format specifier used to print decimal values?

Question Number 19

The preprocessor provides the ability for which of the following options?

The inclusion of header files

The inclusion of macro expansions

Conditional compilation.

All of the above

Question Number 20

The following program is used to display the student details using structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    student stud[10];
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

struct student

scanf("%d", &stud[i].marks);

student stud[10];

No change needed, program will give the correct output.

Question Number 21

Give the output of the following code snippet :

#define MAX 1000
int main()
{

    printf("%d ", MAX);
    return 0;
}

No output

1000

None of the above

Question Number 22

Name the escape sequence to print a tab space in printf function in C :

Question Number 23

The following program is used to add two complex numbers by passing structure to a function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

scanf("%f", &n2.real);

temp = Add();

temp.real = n1 + n2;

No change needed, program will give the correct output.

Question Number 24

The following program is used to add 'n' numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int num, sum = 0, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = 1; count == num; count++)
    {
        scanf("%d", &value);
        sum = sum + value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

for (count = 1; count == num; count++)

scanf("%d", &value);

sum = sum + value;

No change needed, program will give the correct output.

Question Number 25

Give the output of the following code snippet :

#define func(x, y) x + y - x
int main()
{
    int i = 3, j = 3;
    printf("%d\n",func(i*j, 2));
    return 0;
}

Compilation error

Question Number 26

Give the output of the following code :

int main()
{
    int x=12, y=7, z;
    z = x!=4 || y == 2;
    printf("%d\n", z);
    return 0;
}

Question Number 27

The following program is used to swap two values. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    value2 = temp;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1 + value2; value1 = value2;

temp = value1; value1 = value2;

temp = value2; value1 = value2/2;

No change needed, program will give the correct output.

Question Number 28

Which of the following are examples of mathematical functions in C?

atan2()

fabs()

exp()

All of the above.

Question Number 29

The following program is used to add two distances ( inch to feet ) using structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

struct Distance
{
    int feet;
    float inch;
};
Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

if (sum.inch>12.0)

Distance dist1, dist2, sum;

sum.inch = dist1.inch + dist2.inch

No change needed, program will give the correct output.

Question Number 30

Which of the following type specifiers are used to denote a floating point value in the scanf() function?

All of the above.

Question Number 31

The following program is used to copy a file. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");
    fclose(source);

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(target);

    return 0;
}

FILE *source, *target;

source = fopen("CopyFile.txt", "r");

fclose(source);

No change needed, program will give the correct output.

Question Number 32

Give the output of the following code snippet :

void main()
{
    int x=3,y=6;
    double z=sqrt((double)x);
    printf("%.2f",z);
}

1.73

Compilation error

Question Number 33

The following program is used to generate the palindrome of a number. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

reverse = reverse * 10;

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 34

Give the output of the following code snippet:

void main()
{
    int c;
    scanf ("%d",c);
    printf("Obtained value is %d", c);
}

Garbage value

Run time error

None of the above

Question Number 35

Which of the following are types of C constants ?

Enumeration constants

Real or floating point constants.

Octal / Hexadecimal constants

All of the above.

Question Number 36

The following program is used to generate the palindrome of a number. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = value;

reverse = reverse * 10;

reverse = reverse + num;

No change needed, program will give the correct output.

Question Number 37

Which of the following are types of C constants ?

Integer constants

Real or floating point constants.

Character constants

All of the above.

Question Number 38

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    return count;
}

while (s[count] != '\0') count++;

while (s[count] != 1) count--;

while (s != '\0') count++;

No change needed, program will give the correct output.

Question Number 39

A character constant in C is an integer, with a single character within:

" "

' '

None of the above.

Question Number 40

Give the output of the following code snippet :

#define CUBE(X) X*X*X
void main()
{
    printf("%d  ", CUBE(3));
    printf("%d", CUBE(2+3));
}

27 125

27 225

18 17

27 17

Question Number 41

The following program is used to delete a file. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int status;

    if (status == 0)
        printf("File has been deleted successfully\n");
    else
    {
        printf("Unable to delete the file\n");
        perror("Error");
    }
    return 0;
}

status = remove();

status = delete("Input.txt");

status = remove("Input.txt");

No change needed, program will give the correct output.

Question Number 42

Give the output of the following code snippet :


int main()
{
    int y=128;
    const int x=y;
    printf("%d\n", x);
    return 0;
}

128

Compiler error

Garbage value.

Question Number 43

Give the output of the following code snippet :

void main()
{
    int long;
    long=10;
    printf("%d",long);
}

Garbage value

Compilation error

Question Number 44

What is a header file in C?

A text file.

A graphic image.

An excel sheet

None of the above.

Question Number 45

The following program is used to add two complex numbers by passing structure to a function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(struct complex n1, struct complex n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

temp = Add(struct complex n1, struct complex n2);

struct complex Add(struct complex n1, struct complex n2)

temp.imag = n1.imag + n2.imag;

No change needed, program will give the correct output.

Question Number 46

The following program is used to find the GCD and LCM of two numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y % 10;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

a = x;

b = y % 10;

No change needed, program will give the correct output.

Question Number 47

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fileopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

source = fileopen("CopyFile.txt", "r");

if (source == NULL)

No change needed, program will give the correct output.

Question Number 48

Input switching is invisible if input comes from another program using pipe mechanism in C.State true or false.

Always true.

Always false.

Sometimes true and sometimes false.

Not enough information to provide the right answer .

Question Number 49

The following program is used to merge two arrays into a single array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

else if (j == num1)

result[i] = arry1[j];

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 50

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] == '\0')
        count++;

    return count;
}

while (s[count] == '\0')

length = string_length(str);

scanf("%s", str);

No change needed, program will give the correct output.

Question Number 51

Give the output of the following code snippet :

#define SWAP(a,b)(a=a+b,b=a-b,a=a-b)
void main()
{
    int a=3,b=10,c=5;
    SWAP(a,b);
    printf("%d %d",a,b);
}

10 3

3 10

No output

Compilation error

Question Number 52

The following program is used to find the substring in a string without using string function. Which of the following statement(s) given in the choices should reordered to make the program compile, link and run and give the desired output?

int main()
{
    char str[100], sub[100];
    int position, length, count;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        sub[count] = str[position + count - 1];
        count++;
    }
    count = 0;
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

count = 0;

sub[count] = '\0';

while (count < length)

No change needed, program will give the correct output.

Question Number 53

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?


int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        count++;
    }
    d[count] = '\0';
}

copy_str(char[], char[]);

void copy_str(char[], char[]);

void copy_str(char[]);

No change needed, program will give the correct output.

Question Number 54

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
void complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

void complex Add(struct complex n1, struct complex n2)

temp.real = n1.real + n2.real;

temp.imag = n1.imag + n2.imag;

No change needed, program will give the correct output.

Question Number 55

structure complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

structure complex

temp = Add(n1, n2);

struct complex temp;

No change needed, program will give the correct output.

Question Number 56

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        count = num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

count = num2;

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 57

The following program is used to compare two strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (a[count] == '\0')

if (a[count] == '\0' && b[count] != '\0')

if (a[count] == '\0' || b[count] == '\0')

No change needed, program will give the correct output.

Question Number 58

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1;
    value2 = temp;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

value1 + temp = value2;

value1 = value2;

value2/ temp = value2;

No change needed, program will give the correct output.

Question Number 59

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be rearranged to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {
                arry[d] = arry[d + 1];
                temp = arry[d];
                arry[d + 1] = temp;
            }
        }
    }
}

arry[d] = arry[d + 1];

for (d = 0; d < n - c - 1; d++)

if (arry[d] > arry[d + 1])

No change needed, program will give the correct output.

Question Number 60

Give the output of the following code snippet :

int main()
{
#ifdef Hello
    printf("Hello\t");
#else
    printf("World\t");
#endif
}

Hello

World

No output

Compilation error

Question Number 61

The following program is used to find the maximum value in an array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (count = 1; count <  size; count++)
    {
        maximum = array[count];
        location = count + 1;
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

if (array[count] == maximum)

if (array[count] > maximum)

maximum = array[count];

No change needed, program will give the correct output.

Question Number 62

Which of the following statements is true about the scanf() function in C?

It reads the characters from a string.

Stops execution when some input fails to match control specification

The return value of the function is float.

All of the above.

Question Number 63

The following program is used to add 'n' numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int num, sum = 0, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = sum; count < = 0 ; count--)
    {
        scanf("%d", &value);
        sum = sum + value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

for (count = sum; count < = 0 ; count--)

scanf("%d", &value);

sum = sum + value;

No change needed, program will give the correct output.

Question Number 64

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < stringlength.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[d] = str[count];

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

#include < stdio.h>

#include < stringlength.h>

strlength = strlen(str);

No change needed, program will give the correct output.

Question Number 65

Give the output of the following code snippet :

#if(10)
int main()
{
    printf("Hello World");
    return 0;
}
#else
int main()
{
    printf("Hello World :Round two");
}
#endif

Hello World

Hello World : Round two

No output

Compiler error

Question Number 66

Give the output of the following code snippet :

#define FUNC(a,b) (a*b+20);
void main()
{
    int a=3,b=10;
    int c=FUNC(a,b);
    printf("%d %d %d",a,b,c);
}

3 10 40

3 10 50

10 3 20

Compilation error

Question Number 67

The following program is used to sort an array of structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (student[i].studId <  student[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

if (student[i].studId < student[j].studId)

stud[i] = stud[j];

scanf("%d", &stud[i].marks);

No change needed, program will give the correct output.

Question Number 68

The following program is used to find the GCD and LCM of two numbers. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

lcm = (x*y) / gcd;

lcm = (x%y) / gcd;

lcm = (x*y) / a;

No change needed, program will give the correct output.

Question Number 69

The following program is used to check if the given number is a prime number or not. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int value, i, flag = 0;
    printf("Enter a positive value: ");
    scanf("%d", &value);
    for (i = 2; i < = value / 2; ++i)
    {
        if (value % i == 0)
        {
            flag = 1;
            break;
        }
    }
    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

scanf("%d", &value);

for (i = 2; i < = value / 2; ++i)

if (flag == 0)

No change needed, program will give the correct output.

Question Number 70

What are the restrictions places on the names of variables and constants in C?

Should contain only letters and digits.

The first character should be a letter.

Keywords such as if, else, for etc. should not be used as variable names.

All of the above.

Question Number 71

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        count++;
    }
    sub[count] = '\0';
    sub[count] = str[position + count - 1];

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

sub[count] = str[position + count - 1];

count++;

No change needed, program will give the correct output.

Question Number 72

Give the output of the following C code snippet :

void main()
{
    printf(" Make hay \n");
    printf("While the sun shines");
}

Make hay While the sun shines

Make hay
While the sun shines

Either 1 or 2

None of the above.

Question Number 73

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] == arry[d + 1])
            {

                temp = arry[d];
                arry[d] = arry[d + 1];
                arry[d + 1] = temp;
            }
        }
    }
}

for (c = 0; c < (n - 1); c++)

for (d = 0; d > n ; d++)

if (arry[d] == arry[d + 1])

No change needed, program will give the correct output.

Question Number 74

Give the output of the following code :


#define Message "Hello World"

int main()
{

    printf("%d\n",Message);
    return 0;
}

Hello World

Compiler error

No output

Garbage value

Question Number 75

Give the output of the following code snippet :

# define max
void Test()
{
    printf("Hello");
}
void main()
{
    max;
    Test();
}

Hello

No output

Compiler error

Garbage value

Question Number 76

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

student stud[10],temp;

if (stud[i].studId < stud[j].studId)

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 77

The following program is used to copy a file. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

int *source, *target;

char *source, *target;

No change needed, program will give the correct output.

Question Number 78

The following program is used to find the maximum value in an array. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (count = 1; count <  size; count++)
    {
        if (array[count] > maximum)
        {
            size = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

size = array[count];

location = count + 1;

for (size = 1; count < size; size ++)

No change needed, program will give the correct output.

Question Number 79

The following program is used to execute a command in the OS. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>
#include< stdlib.h>

int main()
{
    int files;

    printf("Executing command : 'DIR'\n");
    files = systems("dir");

    printf("Returned value is: %d.\n", files);
    return 0;
}

files = systems("dir");

printf("Returned value is: %d.\n", files);

#include< stdlib.h>

No change needed, program will give the correct output.

Question Number 80

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) == EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) == EOF)

fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF)

No change needed, program will give the correct output.

Question Number 81

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    while (str1[count] != '\0')
    {
        count++;
    }

    str1[count] = '\0';
}

str1[count] = '\0';

str1[count] = str2[d]; d++;

while (str1[count] != '\0') { count++; }

No change needed, program will give the correct output.

Question Number 82


int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

int str_compare(char[], char[]);

int str_compare();

str_compare(char[], char[]);

No change needed, program will give the correct output.

Question Number 83

Give the output of the following code snippet :

void main()
{
    int k = 8;
    int m = 7;
    int z = k <  m ? k++ : m++;
    printf("%d", z);
}

Question Number 84

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    while (num < = 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = value;

while (num < = 0)

reverse = reverse * 10;

No change needed, program will give the correct output.

Question Number 85

Give the output of the following code snippet :

#define X (4+Y)
#define Y (X+3)

int main()
{
    printf("%d\n", 4*X+2);
    return 0;
}

Compiler error

Garbage value

Question Number 86

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, str1);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

strcpy(str1, str2);

strcpy(str2, str1);

No change needed, program will give the correct output.

Question Number 87

Which of the following is a valid variable initialization :

char esc='\\';

int x;

float escape;

All of the above.

Question Number 88

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (count = n; count <  size/2; count++)
    {
        if (array[count] > maximum)
        {
            maximum = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

maximum = array[n+1];

for (count = n; count < size/2; count++)

if (array[count] > maximum)

No change needed, program will give the correct output.

Question Number 89

int string_length(char[]);

int main()
{
    char str;
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

char str;

length = string_length(str);

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 90

Which of the following statements is true about EOF in C?

It is a symbolic constant.

It is defined in the header file stdio.h

The value of EOF is typically 1.

Both 1 and 2

Question Number 91

Expressions connected by logical operators && and || are evaluated from

Right to Left

Left to Right

Either 1 or 2

None of the above.

Question Number 92

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    for (count = 0; count <  n; count++)
        scanf("%d", &array[count]);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count <  n - 1; count++)
        {
            array[count] = array[count + 1];
            array[count + 1] = array[count -1];
        }


        printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

array[count] = array[count + 1];

array[count + 1] = array[count -1];

for (count = position - 1; count < n - 1; count++){

No change needed, program will give the correct output.

Question Number 93

What is the value obtained when the sizeof operator is applied to a structure?

Total number of elements in the structure.

Total number of bytes in the structure object.

Size of the largest element in the structure.

None of the above.

Question Number 94

Give the output of the following code snippet :

#define CUBE(p)(p*p*p);
void main()
{
    int a=3,b=10,c=5;
    int x=CUBE(a);
    int y=CUBE(b+c);
    printf("%d %d",x,y);
}

27 125

27 115

36 125

Compilation error

Question Number 95

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

else if (j < num2) { for (; i < num1 + num2;) { result[i] = arry2[k]; k++; } }

else if (j > num1) { for (; i < num1 + num2;) { result[i] = arry2[k]; i++; } }

else if (j == num1) { for (; i < num1 + num2;) { result[i] = arry2[k]; k++; i++; } }

No change needed, program will give the correct output.

Question Number 96

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

while (a[count] == b[count])

while (a[count] > b[count])

while (a[count] < b[count])

No change needed, program will give the correct output.

Question Number 97

The following program is used to print the effective username of the current user when invoked. Which of the following statement(s) given in the choices should be added to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < stdlib.h>


int main()
{
    return 0;
}

system("C:\\WINDOWS\\System32\\user");

system("C:\\WINDOWS\\System32\\user_name ");

system("C:\\WINDOWS\\System32\\whoami ");

No change needed, program will give the correct output.

Question Number 98

Which of the following sequences are not valid in C language?

#if
#else
#endif

#if
#elif
#endif

#if
#if
#endif

#if
#undef
#endif

Question Number 99

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x + y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

temp = b;

gcd = a;

lcm = (x + y) / gcd;

No change needed, program will give the correct output.

Question Number 100

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    if (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

if (b != 0)

b = a % b;

No change needed, program will give the correct output.

Question Number 101

Shifting a value x two positions to the left i.e x << 2 is equivalent to :

Multiplication of x by 4.

Division of x by 4.

Adding x to 4.

Subtracting 4 from x.

Question Number 102

Which of the following are examples of derived data types?

union

int

pointer

Both 1 and 3

Question Number 103

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = value;

reverse = reverse * 10;

reverse = reverse + num % 10;

No change needed, program will give the correct output.

Question Number 104

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    for (count = 0; count <  n; count++)
        scanf("%d", &array[count]);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count <  n - 1; count++)
            array[count] = array[count + 1];

        printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

if (position == n + 1)

array[count -1] = array[count + 1];

for (count = position - 1; count < n - 1; count++)

No change needed, program will give the correct output.

Question Number 105

Give the output of the following code snippet :

void main()
{
#define max 37
    printf("%d", max);
}

No output

Compilation error

Question Number 106

structure Distance
{
    int feet;
    float inch;
};
struct Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

structure Distance { int feet; float inch; };

struct Distance dist1, dist2, sum;

sum.inch = dist1.inch + dist2.inch

No change needed, program will give the correct output.

Question Number 107

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp= n1.real + n2.real;
    temp= n1.imag + n2.imag;
    return(temp);
}

struct complex temp;

temp= n1.real + n2.real; temp= n1.imag + n2.imag;

return(temp);

No change needed, program will give the correct output.

Question Number 108

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud;
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

temp = stud;

stud[i] = stud[j];

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 109

Which of the following functions are declared in the header file math.h?

sin()

isalpha()

toupper()

strcat()

Question Number 110

What is a Library in C?

Contains the definitions of the functions defined in the header files.

Is a set of C standard built in functions, constants and header files.

Both 1 and 2.

None of the above.

Question Number 111

Which of the following is possible with any 2 operators in C?

Same associativity, different precedence

Same associativity, same precedence

Different associativity, different precedence

All of the above

Question Number 112

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    if (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

if (num != 0)

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 113

Give the output of the following code snippet :

#define Cprog 100
int main()
{
    int a = 2;
#ifdef Cprog
    a = 1;
    printf("%d",Cprog);
}

100

Compilation error

Question Number 114

The following program is used to check if the given number is odd or even. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int value;
    printf("Enter the value to be checked : ");
    scanf("%d", &value);
    if ((value % 2) == -1)
        printf("%d is even", value);
    else
        printf("%d is odd ", value);
    return 0;
}

printf("Enter the value to be checked : ");

scanf("%d", &value);

if ((value % 2) == -1)

No change needed, program will give the correct output.

Question Number 115

The following program is used to add two distances ( inch to feet ) using structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct Distance
{
    int feet;
    float inch;
};
struct Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

if (sum > 12.0)

if (sum.inch>12.0)

while (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 116

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < lib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

#include < lib.h>

fclose(source);

target = fopen("Destination.txt", "w");

No change needed, program will give the correct output.

Question Number 117

The group of statements in a C program are enclosed within what type of brackets?

[]

()

{}

None of the above.

Question Number 118

Give the output of the following code snippet :

#define FUNC(x,y,z) x##y##z
void main()
{
    int val=100;
    int val12=200;
    int val1val2=300;
    printf("%d",FUNC(val1,val,2));
}

100

200

300

Compilation error

Question Number 119

Which of the following is the general declaration of the minprintf() function?

int minprintf(char *fmt,....)

void minprintf(char *fmt,....)

void minprintf(char *fmt,char *fm2)

char minprintf(char *fmt,char *fm2);

Question Number 120

The following program is used to find the factorial of a number. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        for (count = 1; count < = n; ++count)
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

for (count = 1; count < = n; ++count)

int fact = 1;

fact = fact * count

No change needed, program will give the correct output.

Question Number 121

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }
}

str1[count] = '\0';

str1[d] = '\0';

str1[count] = 1;

No change needed, program will give the correct output.

Question Number 122

The following program is used to merge two arrays into a single array. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] != arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

if (j < num1 && k < num2)

if (arry1[j] != arry2[k])

result[i] = arry1[j];

No change needed, program will give the correct output.

Question Number 123

The following program is used to sort an array of structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

stud[i] = stud[j]; stud[j] = temp;

stud = stud[j]; stud = temp;

stud[j - 1] = stud[j]; stud[j + 1] = temp;

No change needed, program will give the correct output.

Question Number 124

Give the output of the following code snippet :

#define PI 3.14
int main()
{
    float r=3,area;
    area = 3 * r * PI;
    printf("%f",area);
    return 0;
}

28.260000

Compiler error

Question Number 125

Consider the following code snippet :

void main()
{
    int c=10;
    printf("%d",c);
}
Give the value of c before the line 'int c=10' gets executed.

Garbage value

None of the above.

Question Number 126

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x % y;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = x % y;

b = y;

a = temp;

No change needed, program will give the correct output.

Question Number 127

What are the uses of libraries in C?

Contains the definitions for the functions that are declared in the header files.

Library functions can be used to implement a lot of repetitive and complicated code.

Both 1 and 2

None of the above.

Question Number 128

Give the output of the following code snippet :

#define VAR 100
void func();
void main()
{
    int a=100;
#define VAR 200
    func();
    printf("%d ",VAR+a);

}
void func()
{
    printf("%d ",VAR);
}

200 200

300 300

300 200

200 300

Question Number 129

Give the output of the following code snippet :

#define ABC 5
#define PQR "Hello World"

int main()
{
#ifdef ABC
    printf("%d",ABC * ABC);
#else
    printf("%s",PQR);
#endif

    return 0;
}

Hello World

Compiler error

Question Number 130

Give the output of the following code snippet :


int func();
extern float a;
void main()
{
    int a=func();
    printf("%d",a);
}
float a=100.50;
int func()
{

    return a;
}

100

0.00

100.50

Question Number 131

The following program is used to swap two values. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1;
    value1 = value2;
    value2 = value1 + value2;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1;

value1 = value2;

value2 = value1 + value2;

No change needed, program will give the correct output.

Question Number 132

Give the output of the following code snippet :

int x=10;
void main()
{
    {
        int x=20;
        x+=10;
        printf("%d ",x);
    }
    x=x+10;
    printf("%d",x);
}

20 40

20 30

30 40

30 20

Question Number 133

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        ++count;
        printf("%d ", result);
    }
    num1 = num2;
    num2 = result;
    return 0;
}

result = num1 + num2;

num1 = num2; num2 = result;

while (count< n)

No change needed, program will give the correct output.

Question Number 134

void string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

void string_length(char[]);

length = string_length(str);

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 135

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen(source);

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

target = fopen(source);

fclose(source);

fputc(ch, target);

No change needed, program will give the correct output.

Question Number 136

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        while (a[count] == '\0' || b[count] == '\0')
            continue;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

while (a[count] == b[count])

while (a[count] == '\0' || b[count] == '\0') continue;

if (a[count] == '\0' && b[count] == '\0') return 0;

No change needed, program will give the correct output.

Question Number 137

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(str1, temp);

strcpy(str2, temp);

strcpy(str2);

No change needed, program will give the correct output.

Question Number 138

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 - num2; i++)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

result[i] = arry2[k];

for (i = 0; i < num1 - num2; i++)

else if (j == num1)

No change needed, program will give the correct output.

Question Number 139

struct complex
{
    float real;
    float imag;
};
struct complex Add(complex n1, complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

temp.real = n1.real + n2.real;

temp.imag = n1.imag + n2.imag;

struct complex Add(complex n1, complex n2);

No change needed, program will give the correct output.

Question Number 140

Give the output of the following code snippet :

int main()
{
    int x = 2, y = 0;
    int z = y && (y != 10);
    printf("%d\n", z);
    return 0;
}

No output

Question Number 141

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

for (count = 1; count < = n; ++count) { fact = fact % count; }

for (count = 1; count < = n; ++count) { fact = fact / count; }

for (count = 1; count < = n; ++count) { fact = fact * count; }

No change needed, program will give the correct output.

Question Number 142

Give the output of the following code snippet :

#define Hello
int main()
{
#ifdef Hello
    printf("Hello\t");
#undef Hello
#endif
#ifdef Hello
    printf("World\t");
#endif
}

Hello

Hello World

World

Compilation error

Question Number 143

A user defined header file is generally specified using :

< >

" "

()

All of the above.

Question Number 144

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs2 = fopen("File2.txt", "r");

fs2 = fopen("File2.txt");

fs2 = fopen("r");

No change needed, program will give the correct output.

Question Number 145

The following program is used to add 'n' numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int num, sum = 1, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = 1; count < = num; count++)
    {
        scanf("%d", &value);
        sum = sum / value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

sum = sum / value;

sum = 1;

sum = value;

No change needed, program will give the correct output.

Question Number 146

The following program is used to add 'n' numbers. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int num, sum = 0, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = 1; count < = num; count++)
    {
        sum = sum + value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

scanf("%d", &value);

scanf("%d", value);

scanf("%d", sum);

No change needed, program will give the correct output.

Question Number 147

Give the output of the following code snippet :

void main()
{
    int x=1;
    int i=0;
    int n2=printf("%d\n",++x);
    for(i=0; i< n2; i++)
    {
        printf("Hello");
    }
}

0
HelloHello

1
HelloHelloHello

2
HelloHello

Compilation error

Question Number 148

Give the output of the following code snippet :

#define FUNC(x)  while(i!=0) \
				{\
				  i--;\
				  printf("%d ",x);\
				  }

int main()
{
    int z=10,i=2;
    FUNC(z);
}

10 10

10 10 10

Compilation error

Question Number 149

#include< stdio.h>

int main()
{
    int num, sum, count, value;
    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = 1; count < = num; count++)
    {
        scanf("%d", &value);
        sum = sum + value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

sum = 0;

sum = 1;

sum = value;

No change needed, program will give the correct output.

Question Number 150

Give the output of the following code snippet :

int x=10;
void func()
{
    int x=100;
    printf("%d  ",x);
}
void main()
{
    x+=10;
    func();
    printf("%d  ",x);
}

100 20

10 20

10 10

0 20

Question Number 151

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                temp = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

temp = stud[j];

if (stud[i].studId < stud[j].studId)

for (i = 0; i < num; i++)

No change needed, program will give the correct output.

Question Number 152

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

temp = Add(complex n1, complex n2);

temp = Add();

temp = Add(n1, n2);

No change needed, program will give the correct output.

Question Number 153

The function to generate a sequence of pseudo-random integers is defined in which header file?

math.h

stdlib.h

ctype.h

stdio.h

Question Number 154

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(str1, str2);
    strcpy(str2, temp);
    strcpy(temp, str1);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

scanf("%s", str1);

No change needed, program will give the correct output.

Question Number 155

What is the return type of rand() function?

short

int

long

double

Question Number 156

What is the default return-type of function putchar()?

char

int

char

double

Question Number 157

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

reverse[d] = str[count];

reverse[count + 1] = str[count];

reverse[count] = str[d + 1];

No change needed, program will give the correct output.

Question Number 158

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count == 0; count++, d++)
        reverse[d] = str[count];

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

for (count = strlength - 1, d = 0; count == 0; count++, d++)

reverse[d] = str[count];

reverse[d] = '\0';

No change needed, program will give the correct output.

Question Number 159

Give the output of the following code :

void main()
{
    char c='a';
    printf("Initial value = %c", c);
    scanf("%d",&c);
    printf("New value=%d",c);
}
Assume that the input given  is c='12'. Give the final value of c :

Garbage value

Question Number 160

Give the output of the following code snippet :

void fun()
{
    printf("%d\n", test(-3, 3));
}
int main()
{
#define test(x, y) x / y + x
    fun();
}

-8

-4

Compiler error

Question Number 161

Give the output of the following code snippet :

#define PRINT(int) printf("Val=%d ", int);

int main()
{
    int a=2, b=3;
    PRINT(a);
    PRINT(b);
    return 0;
}

Val=2, Val=3

Val=1,Val=2

Val=0,Val=0

Val=3, Val=2

Question Number 162

Which of the following are not unary operators in C?

sizeof

Question Number 163

Give the output of the following code snippet :

void main()
{
    int a = 2 + 3 - 4 + 8 -  5 % 4;
    printf("%d\n", a);
}

Question Number 164

Which of the following statements are not true about macros in C?

They are case sensitive.

Substitution of macros do not take place within quoted strings.

Macros cannot be defined with arguments.

Both 1 and 2

Question Number 165

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {

                temp = arry[d];
                arry[d] = arry[d + 1];
                arry[d + 1] = temp;
                break;
            }
        }
    }
}

temp = arry[d];

arry[d] = arry[d + 1];

break;

No change needed, program will give the correct output.

Question Number 166

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    if (count == n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

if (count == n)

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 167

Give the output of the following code snippet :

#define MIN 10
#ifdef MIN
#define MAX 20
#endif
int main()
{
    printf("%d %d\n", MAX, MIN);
    return 0;
}

20 10

0 10

0 0

Compilation error

Question Number 168

Which preprocessor operator allows to convert any argument in a macro function to a string?

Question Number 169

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

source = fopen("CopyFile.txt");

source = fopen(CopyFile.txt, r);

source = fopen("CopyFile.txt", "r");

No change needed, program will give the correct output.

Question Number 170

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    if ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

if ((ch = fgetc(fs1)) != EOF)

fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF)

No change needed, program will give the correct output.

Question Number 171


{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

structure complex

struct complex

struct

No change needed, program will give the correct output.

Question Number 172

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

while (a[count] == b[count])

flag = str_compare();

flag = str_compare(str1, str2);

No change needed, program will give the correct output.

Question Number 173

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        count++;
    }
    d[count] = s[count++];
}

d[count] = s[count++];

d[count] = s[count];

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 174

What is the meant by ‘a’ in the following operation?

fp = fopen(“New.txt”, “a”);

Attach

Append

Apprehend

Add

Question Number 175

str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

str_cat();

str_cat(str1, str2);

str1[count] = str2[d];

No change needed, program will give the correct output.

Question Number 176

Give the output of the following code snippet :

void main()
{
    int x = 5.3 % 2;
    printf("%d", x);
}

2.3

0.3

Compiler error.

Question Number 177

Give the output of the following code snippet :

#define A 4-2

#define B 3-1

int main()
{

    int ratio=A/B;

    printf("%d ",ratio);

    return 0;
}

Question Number 178

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen(target,"r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

if (source == NULL)

source = fopen(target,"r");

No change needed, program will give the correct output.

Question Number 179

The following program is used to find length of a string without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;
    return count;

    while (s[count] != '\0')
        count++;
}

return count;

length = string_length(str);

int string_length(char[]);

No change needed, program will give the correct output.

Question Number 180

Give the output of the following code snippet :

void main()
{
#define const float
    const float val = 100.25;
    printf("%.2f", val);
}

0.00

100.25

Garbage value

Compilation error

Question Number 181

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str2); strcpy(temp, str1);

strcpy(temp, str2); strcpy(str2, str1);

strcpy(temp, str1); strcpy(str1, str2);

No change needed, program will give the correct output.

Question Number 182

Give the importance of header files in C:

To provide information to the compiler about the library functions used in the program.

Contains the declarations of the functions used.

Both 1 and 2

None of the above.

Question Number 183

Give the output of the following code snippet :

int a;
int main()
{

    printf("%d\n",a);
    return 0;
}

Garbage value

Compiler error.

Question Number 184

Give the output of the following code snippet:

#define SQUARE(x) x*x

int main()
{
    float t=2,a;
    a =SQUARE(t);
    printf("Result = %f", a);
    return 0;
}

0.000000

4.000000

Question Number 185

C preprocessor is conceptually the first step during compilation.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 186

Which of the following data types fall under the floating types classification in C?

float

char

long int

All of the above

Question Number 187

Which of the following statements is true about minprintf() functions in C :

minprint() does not return the number of characters printed.

minprintf() perform similar functions to printf().

minprintf() is used when the number of arguments is not known.

All of the above.

Question Number 188

The function ungetc() may be used with which of the following functions?

scanf

getc

getchar

All of the above.

Question Number 189

While including a header file, if the file name is specified between <>, then where is the file searched?

File is searched for only in the current working directory.

File is searched for in the current directory and then the parent directories present in the path.

Either 1 or 2

None of the above.

Question Number 190

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[count] == '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

while (str1[count] != '\0')

while (str2[count] == '\0')

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 191

Give the output of the following code snippet :

#define START void main() {

#define PRINT printf("Hello World");

#define END }

START

PRINT

END

Hello World

Hello

No output

Compiler error

Question Number 192

Give the output of the following code :

int main()
{
    const c = -11;
    const int d = 34;
    printf("%d, %d\n", c, d);
    return 0;
}

-11 34

11 34

Garbage value

Compiler error.

Question Number 193

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {


            result[i] = arry1[j];
            j++;
        }
        else
        {
            result[i] = arry2[k];
            k++;
        }
        i++;
    }

    else if (j == num1)
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry2[k];
            k++;
            i++;
        }
    }

    else
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry1[j];
            j++;
            i++;
        }
    }
}
}

if (arry1[j] == arry2[k])

if (j < num1 && k < num2)

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 194

Give the output of the following code snippet :

#define a 10
#define a 68
int main()
{
    printf("%c ",a);

    return 0;
}

Compiler error.

Question Number 195

Give the output of the following code snippet :

#include (stdio.h)

void main()
{
    printf("Hello");
}

Hello

No output

Compiler error

None of the above.

Question Number 196

Name the library function used in C to get the input from the user through the console :

scanf ()

main()

printf()

None of the above .

Question Number 197

The following program is used to find the factorial of a number. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        for (count = n; count < = 0; --count)
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

int fact = 1;

for (count = n; count < = 0; --count)

if (n< 0)

No change needed, program will give the correct output.

Question Number 198

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        printf("%d ", result);
    }
    return 0;
}

num2 = result; ++count;

num1 = result; ++count;

num2 = num1; --count;

No change needed, program will give the correct output.

Question Number 199

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fgets("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

source = fgets("CopyFile.txt", "r");

if (source == NULL)

No change needed, program will give the correct output.

Question Number 200

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

for (count = 1; count < = n; ++count)

for (count = 1; count < = fact; ++count)

for (count = 1; count < = n+fact; ++count)

No change needed, program will give the correct output.

Question Number 201

A leading 0 (zero) on an integer constant is used to denote:

octal

hexadecimal

long

None of the above.

Question Number 202

#include< stdio.h>

struct
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

struct { char name[50]; int studId; int marks; }

stud[i] = stud[j]; stud[j] = temp;

if (stud[i].studId < stud[j].studId)

No change needed, program will give the correct output.

Question Number 203

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%c", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

char str1[100], str2[100], temp[50];

scanf("%c", str1);

No change needed, program will give the correct output.

Question Number 204

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud.studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

scanf("%d", &stud.studId);

if (stud[i].studId < stud[j].studId)

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 205

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen(source,"r");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

target = fopen(source,"r");

fclose(source);

fputc(ch, target);

No change needed, program will give the correct output.

Question Number 206



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        --count;
        printf("%d ", result);
    }
    return 0;
}

while (count < n)

--count;

num2 = result;

No change needed, program will give the correct output.

Question Number 207

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");


    return 0;
}

fclose(source); fclose(target);

fclose();

fclose(source,target);

No change needed, program will give the correct output.

Question Number 208

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

while (b != 0)

if (b != 0)

while (b == 0)

No change needed, program will give the correct output.

Question Number 209

The following program is used to check if the given number is a prime number or not. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int value, i, flag = 0;
    printf("Enter a positive value: ");
    scanf("%d", &value);
    for (i = 2; i < = value / 2; ++i)
    {
        if (value == 0)
        {
            flag = 1;
            break;
        }
    }
    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

scanf("%d", &value);

if (value == 0)

if (flag == 0)

No change needed, program will give the correct output.

Question Number 210

The following program is used to find the substring in a string without using string function. Which of the following statement(s) given in the choices should corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        sub[count] = str[position];
        length--;
    }
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

sub[count] = str[position]; length--;

printf("Input a string : \n"); scanf("%s",str);

No change needed, program will give the correct output.

Question Number 211

The following program is used to compare two strings without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    flag = str_compare(str1, str2);

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (a[count] == '\0' || b[count] == '\0') break;

flag = str_compare(str1, str2);

if (a[count] == '\0' && b[count] == '\0') return 0;

No change needed, program will give the correct output.

Question Number 212

Give the output of the following code snippet :

#define SWAP(a,b,c)(c=a,a=b,b=c)
void main()
{
    int a=3,b=10,c=5;
    SWAP(a,b,c);
    printf("%d %d",a,b);
}

10 3

3 10

No output

Compilation error

Question Number 213

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    if (str2[d] == '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

str1[count] = str2[d];

if (str2[d] == '\0')

while (str2[d] != '\0')

No change needed, program will give the correct output.

Question Number 214

A long constant in C is written with the terminal :

l(ell)

Either 1 or 2

None of the above.

Question Number 215

#include< stdio.h>

student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

student{ char name[50]; int studId; int marks; }

stud[i] = stud[j]; stud[j] = temp;

if (stud[i].studId < stud[j].studId)

No change needed, program will give the correct output.

Question Number 216

Give the output of the following code :


#define Message "Hello World"

int main()
{

    printf("%s\n",Message);
    return 0;
}

Hello World

Compiler error

No output

None of the above

Question Number 217

#include< stdio.h>
#include< stdlib.h>

int main()
{
    int files;

    printf("Executing command : 'DIR'\n");
    files = system("dirctry");

    printf("Returned value is: %d.\n", files);
    return 0;
}

files = system("dirctry");

printf("Returned value is: %d.\n", files);

#include< stdlib.h>

No change needed, program will give the correct output.

Question Number 218

The conditional directives #if and #ifdef perform the same operations. State true or false.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 219

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] == arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

else if (j == num1)

if (arry1[j] == arry2[k])

if (j < num1 && k < num2)

No change needed, program will give the correct output.

Question Number 220



#include < stdio.h>

int main()
{
    int count, n, num1, num2, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

count = 0; num1 = 0; num2 = 0;

count = 2; num1 = 0; num2 = 0;

count = 2; num1 = 0; num2 = 1;

No change needed, program will give the correct output.

Question Number 221

Give the output of the following code snippet :

void main()
{
    double x=205.25;
    int y=10;
    double z;
    z=x % y;

    printf("%d",z);
}

5.25

Compilation error

Question Number 222



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

result = num1 + num2;

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 223

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

stdlibrary.h

lib.h

stdlib.h

No change needed, program will give the correct output.

Question Number 224

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fclose("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fclose("File1.txt", "r");

fs2 = fopen("File2.txt", "r");

if (fs1 == NULL || fs2 == NULL)

No change needed, program will give the correct output.

Question Number 225

Give the output of the following code snippet :

void func(int a)
{
    int a=200;
    printf("%d",a);
}
void main()
{
    func(10);
}

200

No output

Compilation error

Question Number 226

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fopen(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

source = fopen("CopyFile.txt", "r");

fclose(source);

while ((ch = fopen(source)) != EOF)

No change needed, program will give the correct output.

Question Number 227

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10];
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

struct student

scanf("%s", stud[i].name);

printf("Name: %s", stud[i].name);

No change needed, program will give the correct output.

Question Number 228

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length()
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

while (s[count] != '\0')

int string_length()

return count;

No change needed, program will give the correct output.

Question Number 229

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    for (count = 0; count <  n; count++)
        scanf("%d", &array[count]);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count > 0; count--)
            array[count] = array[count + 1];

        printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

for (count = 0; count < position; count++)

array[count] = array[count + 1];

for (count = position - 1; count > 0; count--)

No change needed, program will give the correct output.

Question Number 230

Which keyword specifies the range of positive and negative values that can be assigned for the character data type?

long

signed

short

All of the above

Question Number 231

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    d[count] = s[count];
    while (s[count] != '\0')
    {
        count++;
    }
    d[count] = '\0';
}

d[count] = '\0';

copy_str(dest, str);

d[count] = s[count];

No change needed, program will give the correct output.

Question Number 232

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

b = a % b;

b = a / b;

b = a * b;

No change needed, program will give the correct output.

Question Number 233

Give the output of the following code snippet :

int x;
float y;
void main()
{

    printf("%d %.2f",x,y);
}

0 0.00

Garbage values

No output

Compilation error

Question Number 234

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
    }
    count++;
    d[count] = '\0';
}

count++;

d[count] = '\0';

copy_str(dest, str);

No change needed, program will give the correct output.

Question Number 235

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fopen(ft)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fopen(ft)) != EOF)

fs2 = fopen("File2.txt", "r");

if (ft == NULL)

No change needed, program will give the correct output.

Question Number 236

If there is any error while opening a file, fopen will return

Nothing

EOF

NULL

Question Number 237

Give the output of the following code snippet :

void main()
{
    int k = sqrt(-4);
    printf("%d\n", k);
}

NAN

Compiler error

Question Number 238

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        d[count] = d[count-1];
        count++;
    }
    d[count] = '\0';
}

d[count] = s[count];

d[count] = d[count-1];

count++;

No change needed, program will give the correct output.

Question Number 239

How is the header file included in the C program?

#include "file.h"

#include < file.h>

Either 1 or 2

None of the above.

Question Number 240

Give the output of the following code snippet :

# define max

void main()
{
    max;

}

No output

Compiler error

Question Number 241

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    ft = fopen("Final.txt", "w");

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fopen("File1.txt", "r"); fs2 = fopen("File2.txt", "r");

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

ft = fopen("Final.txt", "w");

No change needed, program will give the correct output.

Question Number 242

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be removed to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);
    strcpy(str2, str1);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

strcpy(str1, str2);

strcpy(str2, str1);

No change needed, program will give the correct output.

Question Number 243

What are the qualifiers that can be applied to a character type in C?

short

long

signed

All of the above.

Question Number 244

Give the output of the following code snippet :

void main()
{

    printf("%+07d\n", 762);

}

+0762

+762

+000762

0000762

Question Number 245

Which of the following statements is true about the function srand()?

Sets the seed for rand.

Helps to generate a random value.

Is defined in the header file stdib.h

All of the above.

Question Number 246

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            count++;
        break;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

while (a[count] == b[count]) {

if (a[count] == '\0' || b[count] == '\0')

count++;

No change needed, program will give the correct output.

Question Number 247

Give the output of the following code snippet :

#define CUBE(x) (x*x*x)
#define M 10
#define N M+1

int main()
{

    int volume =CUBE(3+2);

    printf("%d %d ",volume,N);

    return 0;
}

17 11

343 11

17 0

Compiler error

Question Number 248

Give the output of the following code snippet :

void main()
{
    int b = 5 + 7 * 4 - 9 * (3-2);
    printf("%d", b);
}

Question Number 249

A string constant in C is a sequence of zero or more characters within:

" "

' '

None of the above.

Question Number 250

struct Distance
{
    int feet;
    float inch;
};
struct Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum = dist1.feet + dist2.feet;
    sum = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

struct Distance dist1, dist2, sum;

sum = dist1.feet + dist2.feet; sum = dist1.inch + dist2.inch;

if (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 251

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
    }
    num = num / 10;
    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

reverse = reverse * 10;

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 252

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b == 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

while (b == 0)

b = a % b;

No change needed, program will give the correct output.

Question Number 253

The following program is used to swap two values. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1;
    value1 = value2 - 1;
    value2 = temp;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1;

value1 = value2 - 1;

value2 = temp;

No change needed, program will give the correct output.

Question Number 254

structure student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10];
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

structure student

struct student stud[10];

stud[i].studId = i + 1;

No change needed, program will give the correct output.

Question Number 255

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    for (count = 0; count <  n; count++)
        scanf("%d", &array[count]);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count <  n - 1; count++)
            if (array[i+1] == array[count + 1])
                array[count] = array[count + 1];

        printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

for (count = position - 1; count < n - 1; count++)

if (array[i+1] == array[count + 1])

array[count] = array[count + 1];

No change needed, program will give the correct output.