C++ Pointers

What is a pointer in C++?

• A function that returns the value of a variable in C++

• A type of data structure in C++

• A variable that holds the memory address of another variable

• A keyword used to declare a variable in C++

How do you declare a pointer in C++?

• int ptr;

• ptr = ∫

• int *ptr;

• ptr = int;

What is the use of the 'new' keyword in C++?

• To dynamically allocate memory for a variable or an object.

• To declare a constant variable

• To print a message to the console

• To create a new function

What is the difference between a pointer and a reference in C++?

• A pointer stores the memory address of another variable, while a reference is an alias for a variable.

• A pointer is used for primitive data types, while a reference is used for complex data types

• A pointer can only be used to access the value of a variable, while a reference can only be used to access the memory address

• A pointer and a reference both store the actual value of a variable

How do you dereference a pointer in C++?

• pointerVariable--

• pointerVariable++

• (*pointerVariable)

• pointerVariable*

What is a null pointer in C++?

• A pointer that does not point to any memory location

• A pointer that points to the beginning of the memory

• A pointer that points to a random memory location

• A pointer that points to a specific memory address

What is the 'this' pointer in C++?

• Pointer that points to a random memory location

• Pointer that points to the object for which a member function is called

• Pointer that points to the beginning of a string

• Pointer that points to the end of an array

What is pointer arithmetic in C++?

• Performing arithmetic operations on pointers

• Using pointers to call functions

• Using pointers to access elements of an array

• Performing arithmetic operations on strings

What is a function pointer in C++?

• A function pointer in C++ is a pointer that points to a variable instead of pointing to a function.

• A function pointer in C++ is a pointer that can only be used with classes, not with regular functions.

• A function pointer in C++ is a pointer that cannot be used to call a function.

• A function pointer in C++ is a pointer that points to a function instead of pointing to a data value.

How do you pass a pointer to a function in C++?

• By using the '->' operator

• By passing the variable name as an argument

• By declaring the function parameter as a reference type

• By declaring the function parameter as a pointer type, and then passing the memory address of the variable when calling the function.