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📝 Architecture of 8085 Microprocessor

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

Practice MCQs for Architecture 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. A program needs to store the 16‑bit address 0x3A7F using register pairs. Which pair should be used so that the high‑order byte is in the first register?

🔹 A. B‑C pair
🔹 B. D‑E pair
🔹 C. H‑L pair
🔹 D. A‑B pair

💡 Difficulty: easy | ✅ Correct: C

Q2. When does the Sign flag (S) become set after an arithmetic operation on the accumulator?

🔹 A. When the result is zero
🔹 B. When the most significant bit of the accumulator is 1
🔹 C. When there is a carry out
🔹 D. When the parity of the result is odd

💡 Difficulty: medium | ✅ Correct: B

Q3. Which statement correctly distinguishes the roles of the Program Counter (PC) and the Stack Pointer (SP) in the 8085 microprocessor?

🔹 A. PC holds address of next instruction while SP holds address of current instruction
🔹 B. PC points to top of stack and SP points to next instruction
🔹 C. PC contains address of next instruction to fetch; SP points to the most recent location pushed onto the stack
🔹 D. PC and SP are interchangeable registers used for any memory addressing

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 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📝 Interrupt Control of 8085 Microprocessor
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