Pointers in C Quiz

What is a pointer in C?

• A function that returns a value in C

• A variable that holds the memory address of another variable

• A type of data structure in C

• A keyword used to declare a variable in C

How do you declare a pointer in C?

• By using the dollar sign ($) before the variable name.

• By using the hash symbol (#) before the variable name.

• By using the exclamation mark (!) before the variable name.

• By using the asterisk (*) symbol before the variable name.

How do you declare and use a pointer to pointer in C?

• int *ptr;

• int **ptr;

• int *ptr = &ptr;

• int ptr = &ptr;

How do you access the value pointed to by a pointer in C?

• Using the asterisk (*) symbol before the pointer name

• Using the exclamation mark (!) before the pointer name

• Using the hash symbol (#) before the pointer name

• Using the dollar sign ($) before the pointer name

What is the size of a pointer in C?

• Depends on the data type it points to

• Always 4 bytes

• Always 8 bytes

• Always 2 bytes

How do you declare and use a pointer to a constant in C?

• int *const ptr;

• const int *ptr;

• int const *ptr;

• Both A and B

What is the purpose of using double pointers in C?

• To store the memory address of a pointer

• To declare a new data type

• To perform arithmetic operations on strings

• To print the value of a pointer

How do you declare and use a pointer to a structure in C?

• struct *ptr = &structure;

• struct ptr = &structure;

• struct *ptr;

• struct ptr = structure;

How do you declare and use a pointer to a constant structure in C?

• const struct *ptr;

• struct const *ptr;

• struct *const ptr;

• Both A and C

What is the purpose of using void pointers to structures in C?

• To store the memory address of a structure

• To declare a new data type

• To perform arithmetic operations on strings

• To create a generic pointer to a structure