In PUSH instruction, after each execution of the instruction, the stack pointer is a) incremented by 1 b) decremented by 1 c) incremented by 2 d) decremented by 2 Answer: d Explanation: The actual current stack-top is always occupied by the previously pushed data.

What is push to stack pointer?

A stack pointer is a small register that stores the address of the last program request in a stack. ... When a new data item is entered or "pushed" onto the top of a stack, the stack pointer increments to the next physical memory address, and the new item is copied to that address.

What is the pointer used in the stack?

The Stack Pointer (SP) register is used to indicate the location of the last item put onto the stack. When you PUT something ONTO the stack (PUSH onto the stack), the SP is decremented before the item is placed on the stack.