Module4LECMT7

What is a pointer in C?

• A function that points to memory.

• A variable that stores an address of another variable.

• A constant memory location.

• A variable that can only store integers.

Which operator is used to retrieve the address of a variable?

• *

• &

• ->

• .

What does the * operator do when used with a pointer?

• Declares a pointer variable.

• Initializes a pointer.

• Dereferences the pointer to access the value stored at the address.

• Retrieves the size of a pointer.

Which of the following is a valid pointer declaration?

• int *ptr;

• int ptr*;

• int &ptr;

• *int ptr;

What value does a NULL pointer contain?

• -1

• 1

• 0

• An undefined value

What is the size of a void pointer on a 32-bit system?

• 2 bytes

• 4 bytes

• 8 bytes

• It depends on the data type it points to.

What happens if a pointer is not initialized?

• It points to the value 0.

• It causes a segmentation fault.

• It holds a garbage address.

• The program will not compile.

Which keyword is used to declare a void pointer?

• null

• generic

• void

• nullptr

Which operation cannot be performed on pointers?

• Incrementing a pointer.

• Adding two pointers.

• Subtracting one pointer from another.

• Comparing two pointers.

What does the following statement do? int *p = &a;

• Creates an integer variable p and assigns it the value of a.

• Declares p as a pointer to a.

• Declares an integer a and points to it.

• Declares a as a pointer to p.