📖 From An Introduction To Microprocessor 8085 • 7. Interrupt Instructions of 8085 • 8 questions available
Practice MCQs for Hardware Interrupts in 8085 Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.
🔄 Last updated: 2026-07-30
Q1. A microcontroller must compute the 2's complement of a 3‑byte number stored starting at address 2101H. Which register pair should be initialized with the address of the first byte before the loop begins?
💡 Difficulty: easy | ✅ Correct: A
Q2. What is the machine‑code opcode for the 8085 instruction CMA (Complement Accumulator)?
💡 Difficulty: medium | ✅ Correct: A
Q3. Assume N = 04h (four bytes) and the source bytes at 2101H‑2104H are FFh, 00h, 7Fh, 80h. After the program finishes, which value will be stored at 2204H?
💡 Difficulty: hard | ✅ Correct: D
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