Correct Answer : All of the mentioned
Explanation : * References are used to refer an existing variable in another name whereas pointers are used to store address of variable.
* References cannot have a null value assigned but pointer can.
* A reference variable can be referenced by pass by value whereas a pointer can be referenced but pass by reference.
* A reference must be initialized on declaration while it is not necessary in case of pointer.
* A reference shares the same memory address with the original variable but also takes up some space on the stack whereas a pointer has its own memory address and size on the stack.
