8085 Interfacing MCQs

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

Question 1

Microprocessors & Microcontrollers8085 Interfacing

In the 8085, the lower-order address bus AD0-AD7 is multiplexed with the?

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Correct Answer: A. Data bus

Explanation: AD0-AD7 carry the low-order address during the first part of a machine cycle and data during later parts.

Reference: Standard microprocessors and microcontrollers: 8085 interfacing

Question 2

Microprocessors & Microcontrollers8085 Interfacing

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Correct Answer: A. ALE

Explanation: Address Latch Enable (ALE) indicates when AD0-AD7 contain the low-order address so an external latch can store it.

Reference: Standard microprocessors and microcontrollers: 8085 interfacing

Question 3

Microprocessors & Microcontrollers8085 Interfacing

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Correct Answer: A. Direct memory access

Explanation: An external DMA controller can assert HOLD; the processor responds with HLDA after relinquishing the buses.

Reference: Standard microprocessors and microcontrollers: 8085 interfacing