Learn and Master C Programming - What is a pointer?

The video tutorial explains pointers in C&C, covering their definition, declaration, and memory usage. It emphasizes the importance of initializing pointers to avoid errors and discusses how pointers are stored in memory. The tutorial also covers dereferencing pointers and how it affects the values stored in memory. Examples are provided to illustrate these concepts, and the differences between 32-bit and 64-bit systems are highlighted.

What is the primary purpose of a pointer in C?

• To store a memory address

• To store a variable name

• To store a function name

• To store a data type

Which symbol is used in C to declare a pointer?

• Dollar ($)

• Hash (#)

• Asterisk (*)

• Ampersand (&)

Why is it important to initialize pointers before using them?

• To save memory space

• To make the code more readable

• To avoid accessing unintended memory locations

• To increase program speed

What operator is used to assign an address to a pointer?

• Decrement operator (--)

• Increment operator (++)

• Address-of operator (&)

• Dereference operator (*)

On a 64-bit system, how many bytes does a pointer typically occupy?

• 16 bytes

• 8 bytes

• 4 bytes

• 2 bytes

What does dereferencing a pointer allow you to do?

• Change the pointer's address

• Access the value at the pointer's address

• Access the pointer's name

• Change the pointer's data type

If a pointer P points to an integer A, what does the expression *P = 15 do?

• Assigns 15 to the address of P

• Assigns 15 to A

• Assigns 15 to P

• Assigns 15 to the address of A