C Programming MCQ Questions and Answers

C Programming MCQ Questions and Answers downlaod c mcq gk question for all exams

Which one of the following is not a valid variable name declaration?
1. int _a3;
2. int a_3;
3. int 3_a;
4. int _3a;

Ans. C (int 3_a;)

If integer needs 2 bytes of storage, then maximum value of an unsigned integer is?
1. 2¹¹
2. 2¹⁶– 1
3. 2¹⁵ – 1
4. 2¹⁶

Ans. D (2¹⁶-1)

Which is the only function in all C programs must contain?
1. Printf( )
2. start ( )
3. main ( )
4. System ( )

Ans. C (main( ))

An array elements are always stored in-----------memory locations.
1. Random
2. Sequential
3. Sequential and Random
4. None of these

Ans. B (Sequential)

If the two strings are identical, then strcmp()function returns
1. 0
2. True
3. 1
4. None of these

Ans. A (0)

Which one of the following function is more appropriate for reading in a multi-word string?
1. scanf( )
2. Printf( )
3. puts( )
4. gets( )

Ans. D (gets( ))

What keyword is used to transfer control from a function back to the calling function is
1. switch
2. return
3. goto
4. goback

Ans. B (return)

What are the types of linkages?
1. Internal
2. External and Internal
3. External, Internal and None
4. External and None

Ans. C (External, Internal and None)

How can you round off a value from 1.66 to 2.0?
1. Ceil (1.66)
2. Roundup (1.66)
3. Roundto (1.66)
4. Floor (1.66)

Ans. A (ceil (1.66)

A real number is treated by default as a ________?
1. Double
2. Float
3. Long double
4. Far double

Ans. A (double)

The following statement is a declaration or definition?
extern int i;
1. Definition
2. Function
3. Declaration
4. Error

Ans. C (Declaration)

In which header file is the NULL macro defined?
1. stddef.h
2. math.h
3. stdio.h
4. stdio.h and stddef.h

Ans. D (Stdio.h and stddef.h)

Which operator is used to get value at address stored in a pointer variable is?
1. &&
2. ||
3. *
4. &

Ans. C ( * )

Ans. B (printf(“
”)

Which header file will be included to use functions like malloc()and calloc()?
1. dos.h
2. string.h
3. stdlibh
4. memory.h

Ans. C (stdlib.h)

What function will be used to free the memory allocated by calloc()?
1. free( );
2. dealloc( );
3. malloc( )
4. memalloc(variable_name, 0)

Ans. A (free( ); )

Which keyword will be used for coming out of recursion?
1. Break;
2. Exit;
3. Return;
4. None of these

Ans. C (return;)

What is the invalid identifier from the below?
1. __0__
2. volatile
3. DOUBLE
4. Int

Ans. B (volatile)

What is the built in function to compare 2 strings?
1. strcmp( )
2. string_cmp( )
3. equals( )
4. str_compare( )

Ans. A (strcmp( ))

Which one of the following is an invalid assignment operator?
1. a /= 10;
2. a %= 10;
3. a |= 10;
4. None of these

Ans. D (None of these)

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