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📝 Controller Sequencer of Simple as Possible (SAP) I Computer

📖 From An Introduction To Microprocessor 8085 • 2. Simple as Possible (SAP) - I • 12 questions available

Practice MCQs for Controller Sequencer of Simple as Possible (SAP) I Computer. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

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Q1. A microcontroller must compute 27 − 15 using its ALU. Which control signal should be asserted to perform this operation?

🔹 A. Add

🔹 B. Subtract

🔹 C. Multiply

🔹 D. Divide

💡 Difficulty: easy | ✅ Correct: B

Q2. A CPU fetches an instruction to multiply the contents of registers R1 = 4 and R2 = 5. Which sequence of control‑unit actions correctly describes the process?

🔹 A. Fetch instruction, decode, assert multiply control, store result

🔹 B. Decode, fetch, assert multiply control, store result

🔹 C. Fetch, assert multiply control, decode, store result

🔹 D. Fetch, decode, store result, assert multiply control

💡 Difficulty: medium | ✅ Correct: A

Q3. In a pipelined processor, the control unit must issue a branch instruction while the ALU is still processing a previous addition. Which technique ensures correct sequencing?

🔹 A. Stalling

🔹 B. Speculative execution

🔹 C. Out‑of‑order execution

🔹 D. Dynamic scheduling

💡 Difficulty: hard | ✅ Correct: A

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