8085 Logical Instructions MCQs

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

Question 1

Microprocessors & Microcontrollers8085 Logical Instructions

If A=3CH in the 8085, executing CMA produces?

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Correct Answer: A. C3H

Explanation: CMA complements every accumulator bit. The one's complement of 3CH (00111100) is C3H (11000011).

Reference: Standard microprocessors and microcontrollers: 8085 logical instructions

Question 2

Microprocessors & Microcontrollers8085 Logical Instructions

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Correct Answer: A. CMP

Explanation: CMP internally compares by subtraction for flag setting but leaves the accumulator unchanged.

Reference: Standard microprocessors and microcontrollers: 8085 logical instructions

Question 3

Microprocessors & Microcontrollers8085 Logical Instructions

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Correct Answer: B. Zero

Explanation: If A-B=0 during comparison, the Zero flag is set.

Reference: Standard microprocessors and microcontrollers: 8085 logical instructions