← Back to 2. Simple as Possible (SAP) - I

📝 Instruction Register of Simple as Possible (SAP) I Computer

📖 From An Introduction To Microprocessor 8085 • 2. Simple as Possible (SAP) - I • 8 questions available

Practice MCQs for Instruction Register 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

Easy Questions

Medium Questions

Hard Questions

📝 Sample Questions

Q1. What is stored in the Instruction Register (IR) of a CPU after the fetch phase?

🔹 A. The next memory address to be accessed

🔹 B. The current instruction fetched from memory

🔹 C. The result of the last ALU operation

🔹 D. The status flags of the CPU

💡 Difficulty: easy | ✅ Correct: B

Q2. Why does the control unit rely on the opcode portion of the instruction held in the IR to generate appropriate control signals?

🔹 A. Because the opcode contains the memory address of the next instruction

🔹 B. Because the opcode specifies the operation type the ALU must perform

🔹 C. Because the opcode holds the data values for arithmetic

🔹 D. Because the opcode determines the clock speed

💡 Difficulty: medium | ✅ Correct: B

Q3. In a synchronous CPU, what role does the clock pulse play in transferring the fetched instruction into the Instruction Register?

🔹 A. It determines the voltage level of the instruction bits

🔹 B. It synchronizes the latch that captures the instruction on a rising edge

🔹 C. It encrypts the instruction before storage

🔹 D. It directly computes the instruction's opcode

💡 Difficulty: hard | ✅ Correct: B

⬆️ View all questions in the quiz below

🔗 Related Topics

📝 Architecture of Simple as Possible (SAP) I Computer 📝 Instruction Set of Simple as Possible (SAP) I Computer 📝 Programming of Simple as Possible (SAP) I Computer 📝 Working of Simple as Possible (SAP) I Computer 📝 Fetch Cycle of Simple as Possible (SAP) I Computer

🚀 Start Quiz 📝 Practice Mode