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Module 3: Instruction Set and Programming

20222m

PUSH and POP instructions are used to ____ and ____ respectively.
(i) Send the data from the stack, copy the data to the stack
(ii) Send the data to the stack, copy the data from the stack
(iii) All of the above
(iv) None of the above

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Answer: (ii) Send the data to the stack, copy the data from the stack

Explanation: PUSH sends/copies source byte to stack (write, SP++), POP copies data from stack to destination (read, SP--). Option (ii) states PUSH = to stack, POP = from stack, which is correct. Option (i) reverses them.

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