INTRODUCTION TO MICROPEOCESSOR
MICRO PROCESSOR AND MICRO CONTROLLER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which register holds the address for a stack whose value is supposed to be directed at the topmost position?
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Stack Pointer
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Stack Register
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Both a & b
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None of the above
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Explanation:
Detailed explanation-1: -The stack pointer “SP” is the register which holds the address of the top of the stack.
Detailed explanation-2: -On x86, the stack pointer is stored in the register called “rsp” (Register: Stack Pointer). Conceptually, the stack is divided into two areas: high addresses are all in use and reserved (you can’t change these values!), and lower addresses that are unused (free or scratch space).
Detailed explanation-3: -5. 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.
There is 1 question to complete.