📖 From An Introduction To Microprocessor 8085 • 10. Programmable Keyboard and Display Interface: 8279 • 9 questions available
Practice MCQs for Two key Lockout of 8279. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.
🔄 Last updated: 2026-07-30
Q1. In an 8253 timer circuit, which pin provides the ground connection?
💡 Difficulty: easy | ✅ Correct: A
Q2. A microcontroller wants to read the current value of counter 1. Which combination of control signals must be asserted?
💡 Difficulty: medium | ✅ Correct: A
Q3. To write a mode word to counter 0, which control‑signal settings are required?
💡 Difficulty: hard | ✅ Correct: B
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