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πŸ“ Register Section of 8085 Microprocessor

πŸ“– From An Introduction To Microprocessor 8085 β€’ 5. The 8085 Microprocessor β€’ 18 questions available

Practice MCQs for Register Section of 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
5
Hard Questions

πŸ“ Sample Questions

Q1. What are the four additional 8‑bit registers provided by the SAP‑III computer?

πŸ”Ή A. A, B, C, D
πŸ”Ή B. D, E, H, L
πŸ”Ή C. X, Y, Z, W
πŸ”Ή D. M, N, O, P

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

Q2. If the program counter is 16β€―bits wide, what is the maximum amount of memory that can be directly addressed?

πŸ”Ή A. 64β€―KB
πŸ”Ή B. 128β€―KB
πŸ”Ή C. 256β€―KB
πŸ”Ή D. 512β€―KB

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

Q3. An arithmetic shift left is performed on the accumulator containing 0x7F (01111111β‚‚). What is the new accumulator value and which flags are affected?

πŸ”Ή A. 0xFE, S=1, Z=0, CY=0, P=0
πŸ”Ή B. 0xFE, S=0, Z=0, CY=1, P=1
πŸ”Ή C. 0xFF, S=1, Z=0, CY=0, P=1
πŸ”Ή D. 0x00, S=0, Z=1, CY=1, P=1

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

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πŸ”— Related Topics

πŸ“ Architecture of 8085 MicroprocessorπŸ“ Address Buffer and Address Data Buffer of 8085 MicroprocessorπŸ“ Arithmetic and Logical Unit (ALU) of 8085 MicroprocessorπŸ“ Timing and Control Unit of 8085 MicroprocessorπŸ“ Interrupt Control of 8085 Microprocessor
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