Pointer | MCQs

Explanation

In both C and C++ programming languages, the symbol used to access the value stored at a memory address (dereferencing a pointer) is the asterisk (*).

* and & are the operators used in pointers.

* gives us the value stored at a particular address

whereas “ & “ gives us the address of the variable

Explanation

• the arrowhead that moves n the screen when you move the mouse is called the cursor
• **
• The mouse pointer, or cursor, represents the mouse on the computer screen
• The cursor usually looks like an arrow, but its shape can change depending on what you are aiming for.
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• Some people call the cursor the 'mouse pointer' or 'arrow'
• The small arrow on the computer screen is called a mouse pointer.
• **
• 
  

Explanation

In C, the asterisk (*) symbol is used to dereference a pointer.

It means to access the value stored at the address held by the pointer. 

Therefore, *ptr is the correct syntax to access the value at the address ptr.

Explanation

Null pointers can be used for various purposes in programming, including as an error value, a sentinel value, and to stop indirection in a recursive data structure.