8085 Stack & Subroutines MCQs

Practice 8085 Stack & Subroutines MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Microprocessors & Microcontrollers8085 Stack & Subroutines

The 8085 PUSH B instruction places which register pair on the stack?

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Correct Answer: A. BC

Explanation: PUSH B means push the BC register pair onto the stack.

Reference: Standard microprocessors and microcontrollers: 8085 stack & subroutines

Question 2

Microprocessors & Microcontrollers8085 Stack & Subroutines

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Correct Answer: C. RET

Explanation: RET pops the saved return address from the stack into the program counter.

Reference: Standard microprocessors and microcontrollers: 8085 stack & subroutines

Question 3

Microprocessors & Microcontrollers8085 Stack & Subroutines

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Correct Answer: A. Stack

Explanation: CALL pushes the return address onto the stack before transferring control to the subroutine.

Reference: Standard microprocessors and microcontrollers: 8085 stack & subroutines

Question 4

Microprocessors & Microcontrollers8085 Stack & Subroutines

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Correct Answer: B. Lower memory addresses

Explanation: PUSH/CALL operations decrement the stack pointer, so the 8085 stack grows toward lower memory addresses.

Reference: Standard microprocessors and microcontrollers: 8085 stack & subroutines