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📝 8085 Microprocessor Based Temperature Controller

📖 From An Introduction To Microprocessor 8085 • 15. Applications of Microprocessor • 17 questions available

Practice MCQs for 8085 Microprocessor Based Temperature Controller. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-30

4
Easy Questions
7
Medium Questions
6
Hard Questions

📝 Sample Questions

Q1. In order to show a temperature value on the six 7‑segment displays, which register must contain the BCD‑coded digit before the display routine is called?

🔹 A. Register A
🔹 B. Register B
🔹 C. Register C
🔹 D. Register D

💡 Difficulty: easy | ✅ Correct: A

Q2. If the 8085 uses the RST7.5 interrupt every 1 ms to count seconds, how many interrupts must occur to represent one full second?

🔹 A. \(500\)
🔹 B. \(1000\)
🔹 C. \(2000\)
🔹 D. \(1024\)

💡 Difficulty: medium | ✅ Correct: A

Q3. When adding a heating element control to the temperature controller, which port bit should be toggled to switch the heater on after the measured temperature exceeds the setpoint?

🔹 A. Port A bit 0
🔹 B. Port B bit 3
🔹 C. Port C bit 7
🔹 D. Port D bit 2

💡 Difficulty: hard | ✅ Correct: C

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