📝 Instruction Set of 8085 Microprocessor

📖 From An Introduction To Microprocessor 8085 • 5. The 8085 Microprocessor • 27 questions available

Practice MCQs for Instruction Set of 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

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📝 Sample Questions

Q1. What is the size of the program counter in the SAP-III computer?

🔹 A. 8-bit

🔹 B. 12-bit

🔹 C. 16-bit

🔹 D. 24-bit

💡 Difficulty: easy | ✅ Correct: C

Q2. Which register pair is used to hold a 16‑bit address for indirect memory operations?

🔹 A. A‑B

🔹 B. B‑C

🔹 C. D‑E

🔹 D. H‑L

💡 Difficulty: medium | ✅ Correct: D

Q3. Explain how the Carry flag is used to detect overflow in signed arithmetic on the 8085.

🔹 A. The Carry flag is set when the most significant bit flips from 0 to 1

🔹 B. The Carry flag is irrelevant for signed numbers; only the Sign flag matters

🔹 C. Overflow is indicated when the Carry into the MSB differs from the Carry out of the MSB

🔹 D. The Carry flag always mirrors the Zero flag for signed operations

💡 Difficulty: hard | ✅ Correct: D

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🔗 Related Topics

📝 Architecture of 8085 Microprocessor 📝 Register Section of 8085 Microprocessor 📝 Address Buffer and Address Data Buffer of 8085 Microprocessor 📝 Arithmetic and Logical Unit (ALU) of 8085 Microprocessor 📝 Timing and Control Unit of 8085 Microprocessor

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