C Programming MCQ Test (25 Marks)

MCQ Quiz on C Programming

1. Who is the father of C programming language?

James Gosling
Dennis Ritchie
Bjarne Stroustrup
Guido van Rossum

2. Which of the following is a valid C variable name?

2variable
variable_1
#var
variable-1

3. What is the size of `int` in C on a 32-bit system?

2 bytes
4 bytes
8 bytes
Depends on the compiler

4. What is the output of `printf("%d", (5 + 2) * 3);`?

15
21
17
Error

5. Which of the following is not a valid storage class in C?

auto
register
static
mutable

6. Which of the following is used to declare a constant in C?

#define
const
both a and b
none of the above

7. Which of the following is the correct syntax for a `for` loop in C?

for (int i = 0; i < 10; i++)
for (i = 0; i < 10)
for (i = 0; i < 10; i+=)
for (i < 10; i++)

8. Which header file is used for input/output operations in C?

stdio.h
conio.h
string.h
math.h

9. What is the purpose of `return 0;` in the `main()` function?

It indicates successful execution.
It terminates the program abnormally.
It returns the value of the main function to the compiler.
None of the above

10. Which operator is used to access the value at the address stored in a pointer variable?

*
&
->
.

11. What is the output of the following code: `printf("%d", 5 + 2 * 3);`?

21
17
15
Error

12. Which of the following is used to define a macro in C?

#include
#define
#ifdef
#ifndef

13. Which of the following is a correct way to declare a pointer in C?

int ptr;
int *ptr;
pointer int ptr;
ptr int *;

14. Which of the following operators is used to allocate memory dynamically in C?

malloc
calloc
realloc
All of the above

15. What is the correct syntax for declaring a function in C?

function void myFunc();
void myFunc();
void myFunc(void);
void myFunc{};

16. Which of the following is true about the `switch` statement in C?

It can have multiple `else` clauses.
It only works with integer and character types.
The `switch` expression can only be of type `int`.
The `break` statement is optional.

17. What does the `sizeof` operator in C return?

The number of bytes occupied by a variable or data type.
The address of the variable or data type.
The maximum value a variable can hold.
The length of the string variable.

18. Which of the following is the correct way to define an array in C?

int arr[10];
int[10] arr;
arr[10] int;
int arr(10);

19. What is the correct way to comment a block of code in C?

// This is a comment
/* This is a comment */

# This is a comment

20. Which of the following is the correct syntax to declare a constant in C?

const int a = 10;
int const a = 10;
Both a and b
None of the above

21. What is the result of the expression `5/2` in C when both operands are integers?

2.5
2
3
2.0

22. Which of the following is not a valid pointer operation in C?

Dereferencing a pointer
Arithmetic operations on pointers
Assigning an integer to a pointer directly
None of the above

23. Which keyword is used in C to define a constant value?

const
define
static
immutable

24. What is the default value of an uninitialized static variable in C?

0
Undefined
Garbage value
NULL

25. Which of the following operators is used for bitwise AND operation in C?

&
&&
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