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πŸ“ Direct Memory Access (DMA) Data Transfer in 8085 Microprocessor

πŸ“– From An Introduction To Microprocessor 8085 β€’ 7. Interrupt Instructions of 8085 β€’ 19 questions available

Practice MCQs for Direct Memory Access (DMA) Data Transfer in 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

πŸ”„ Last updated: 2026-07-30

4
Easy Questions
9
Medium Questions
6
Hard Questions

πŸ“ Sample Questions

Q1. What is the purpose of the CMA instruction in the two’s complement routine?

πŸ”Ή A. CMA
πŸ”Ή B. ADI
πŸ”Ή C. STAX D
πŸ”Ή D. ADD B

πŸ’‘ Difficulty: easy | βœ… Correct: A

Q2. If the byte at memory location 2101β€―H containsβ€―FFβ€―H, what value will be stored at 2201β€―H after the first iteration?

πŸ”Ή A. 00β€―H
πŸ”Ή B. 01β€―H
πŸ”Ή C. FEβ€―H
πŸ”Ή D. FFβ€―H

πŸ’‘ Difficulty: medium | βœ… Correct: A

Q3. In a scenario where the source and destination memory regions overlap, how would the 8085 two’s complement program behave compared to a DMA transfer?

πŸ”Ή A. Both would produce correct results
πŸ”Ή B. Only the 8085 program would handle overlap correctly
πŸ”Ή C. Only DMA would handle overlap correctly
πŸ”Ή D. Both would corrupt data

πŸ’‘ Difficulty: hard | βœ… Correct: C

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πŸ”— Related Topics

πŸ“ Memory Mapped I/O in 8085 MicroprocessorπŸ“ I/O Mapped I/O or Isolated I/O in 8085 MicroprocessorπŸ“ Data Transfer Schemes in 8085 MicroprocessorπŸ“ Programmed I/O Data Transfer in 8085 MicroprocessorπŸ“ Interrupt Driven I/O Data Transfer in 8085 Microprocessor
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