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📝 Memory Mapped I/O in 8085 Microprocessor

📖 From An Introduction To Microprocessor 8085 • 7. Interrupt Instructions of 8085 • 12 questions available

Practice MCQs for Memory Mapped I/O in 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

2
Easy Questions
6
Medium Questions
4
Hard Questions

📝 Sample Questions

Q1. Which opcode complements the accumulator in the 8085 instruction set?

🔹 A. CMA
🔹 B. DAA
🔹 C. RLC
🔹 D. STC

💡 Difficulty: easy | ✅ Correct: C

Q2. Why is the carry flag essential when forming the two’s complement of a multi‑byte number?

🔹 A. It indicates overflow from the low‑order byte to the next byte
🔹 B. It stores the most significant bit of the original number
🔹 C. It determines whether the number is signed or unsigned
🔹 D. It has no effect on multi‑byte operations

💡 Difficulty: medium | ✅ Correct: A

Q3. Given N = 03 H and the three source bytes at 2101 H–2103 H are FF H, 00 H, 01 H, what will be stored at 2201 H–2203 H after the program finishes?

🔹 A. 00 H, FF H, FE H
🔹 B. 01 H, FF H, FF H
🔹 C. 00 H, 00 H, FE H
🔹 D. 01 H, 00 H, FF H

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 I/O Mapped I/O or Isolated I/O in 8085 Microprocessor📝 Data Transfer Schemes in 8085 Microprocessor📝 Programmed I/O Data Transfer in 8085 Microprocessor📝 Interrupt Driven I/O Data Transfer in 8085 Microprocessor📝 Direct Memory Access (DMA) Data Transfer in 8085 Microprocessor
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