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15. Applications of Microprocessor - An Introduction To Microprocessor 8085

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Practice MCQs for 15. Applications of Microprocessor. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

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Q1. What is the purpose of the monitor program located at 0347 H in the real‑time clock design?

🔹 A. Clear the 7‑segment display

🔹 B. Initialize the timer registers

🔹 C. Increment the seconds counter

🔹 D. Store the current time in RAM

💡 Difficulty: easy | ✅ Correct: B

Q2. Which registers must be loaded with 00 h or 01 h before calling the display routine, and why?

🔹 A. A and B, to select address or data field

🔹 B. C and D, to set timer mode

🔹 C. A and C, to enable interrupts

🔹 D. B and D, to reset counters

💡 Difficulty: medium | ✅ Correct: A

Q3. A student modifies the program so that the seconds display increments by 2 each cycle. What unintended effect is most likely to appear?

🔹 A. The clock will run twice as fast, skipping odd seconds

🔹 B. The display will show blank segments

🔹 C. The minutes will never increment

🔹 D. The hour counter will overflow after 12 hours

💡 Difficulty: hard | ✅ Correct: B

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