When should a pointer parameter p be a reference parameter? Group of answer choices When the function changes p, and you do NOT want the change to affect the actual pointer argument.  When the function changes p, and you want the change to affect the actual pointer argument. When the pointer points to a large object. When the function changes *p, and you do NOT want the change to affect the the object that is pointed at. When the function changes *p, and you want the change to affect the the object that is pointed at.

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Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.