100 Multiple Choice Questions In C Programming – Part 5

This collection of 100 Multiple Choice Questions and Answers (MCQs) In C Programming : Quizzes & Practice Tests with Answer focuses on “C Programming”.
 

1. How many times do we get through the following loop?

int c = 10;

while (( c <11 ) { 
	printf("Hello World\n"); 
}

A 0

B 1

C 9

D it is an infinite loop

2. Which data type is most appropriate for storing the value 57000 in a 32-bit system?

A signed short

B unsigned short

C long

D int

3. Which of the following is a user-defined data type?

A typedef int Boolean;

B typedef enum {Monday, Tuesday, Wednesday, Thursday, Friday} Days;

C struct {char address[25], int age};

D All the answers are true

4. How many times do we get through the following loop?

for ( counter = 2; counter < 9; counter += 2 )

A 4

B 5

C 7

D 8

5. What is the size of int type?

A 4 Bytes

B 8 Bytes

C Depends on system and compiler

D Cannot be determined

6. What is the output of the following C program?

#include <stdio.h>

int main()
{
   signed char c;
   c= 235;
   printf("%d\n", c);
   return 0;
}

A 235

B -235

C Depends on compiler

D None of the above

$gcc prog2.c
$ a.out
-128

7. What happens after a return?

A The function stops and returns the indicated result

B The function continues and returns the indicated result

C The function continues and returns no result

D None of the above

8. What is the output of the following C program?

#include <stdio.h>

int main()
{
    char c;
    int i = 0;
    FILE *file;

    // write to the text file
    file = fopen("test.txt", "w+");
    fprintf(file, "%c", 'x');
    fprintf(file, "%c", -1);
    fprintf(file, "%c", 'y');
    fclose(file);

    // read from the text file
    file = fopen("test.txt", "r");
    while ((c = fgetc(file)) != -1)
        printf("%c", c);
    return 0;
}

A Display x

B Infinite loop

C Depends on what fgetc returns

D Depends on compiler

$gcc prog3.c
$ a.out
x

9. What does “short int” mean in C programming?

A basic data type

B qualifier

C short is the qualifier and int is the basic data type

D All the answers are true

10. What is the output of the following C program?

#include <stdio.h>

int main()
{
    float a = 0.1;
    if (a == 0.1)
        printf("equal\n");
    else
        printf("not equal\n");
}

A equal

B not equal

C the output depends on the compiler

D None of the above

$gcc prog1.c
$ a.out
not equal

11. What is the output of the following C program?

#include <stdio.h>

int main()
{
    float a = 0.1;
    if (a == 0.1f)
        printf("equal\n");
    else
        printf("not equal\n");
}

A equal

B not equal

C the output depends on the compiler

D None of the above

$gcc prog2.c
$ a.out
equal

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