Pointers cannot be used to

Answer: Pointers cannot be used to reference a value directly.

Explanation: A pointer stores the memory address of a variable. To access or modify the value at that address you must dereference the pointer using the * operator. Therefore, pointers provide indirect access to values, not direct aliasing.

• Finding an address: pointers hold addresses. Example: int x = 5; int *p = &x; // p stores the address of x

• Simulating call by reference: pass an address to a function. Example: void inc(int *p) { (*p)++; } then call inc(&x);

• Manipulating dynamic structures: pointers link nodes and manage dynamic memory. Example: Node *n = malloc(sizeof(Node)); n->next = anotherNode;

Key idea: Pointers operate on addresses; to get or set the underlying value use the dereference operator. The phrase "reference value directly" implies being an alias to the variable itself, which is not how pointers behave in C.