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📝 Serial Input and Output Data Transfer in 8085 Microprocessor

📖 From An Introduction To Microprocessor 8085 • 7. Interrupt Instructions of 8085 • 25 questions available

Practice MCQs for Serial Input and Output Data Transfer in 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

6
Easy Questions
12
Medium Questions
7
Hard Questions

📝 Sample Questions

Q1. What is the opcode mnemonic used to load the accumulator with immediate data in 8085?

🔹 A. MVI A, data
🔹 B. LXI A, data
🔹 C. ADI data
🔹 D. STA address

💡 Difficulty: easy | ✅ Correct: A

Q2. In the program, what is the purpose of register B after the JNC instruction?

🔹 A. It holds the carry flag for the next addition
🔹 B. It stores the count of remaining bytes
🔹 C. It contains the address of the next memory location
🔹 D. It is used as a temporary accumulator

💡 Difficulty: medium | ✅ Correct: A

Q3. If the program needs to compute the 10’s complement instead of the 2’s complement for each byte, which instruction should replace ADI 01 H?

🔹 A. ADI 09 H
🔹 B. ADI 0A H
🔹 C. CMA only
🔹 D. SUB 01 H

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 Memory Mapped I/O in 8085 Microprocessor📝 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
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