C Programming Quiz

What is the value of a NULL pointer in C?

• 0

• 1

• -1

• Undefined

How do you represent the end of a linked list in C?

• By setting the next pointer to 1

• By setting the next pointer to NULL

• By setting the next pointer to the first node

• By setting the next pointer to -1

Which keyword is used in C to indicate that a function does not return any value?

• int

• void

• return

• NULL

In C, what is the correct way to declare a pointer to an integer?

• int ptr

• int *ptr

• int &ptr

• int ptr*

Which of the following statements about function pointers is true?

• Function pointers cannot be assigned NULL.

• Function pointers can only point to int type functions.

• Function pointers can be passed as arguments to functions.

• Function pointers are not allowed in C.

What is the return type of malloc() in C?

• void

• int

• void*

• char*

How can you define optional parameters in C functions?

• Using the opt keyword

• Using pointers that can be NULL

• Using void keyword

• C does not support optional parameters

What does the following declaration mean: int (*ptr)(int);?

• ptr is a pointer to a function that takes an integer argument and returns an integer

• ptr is a pointer to an integer

• ptr is a function that takes an integer argument and returns a pointer

• ptr is an integer variable

What is the default value of an uninitialized pointer in C?

• NULL

• 0

• Garbage value

• -1

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

• malloc()

• free()

• allocate()

• mem_alloc()