📝 Clocks and timers in Application I/O Interface

Q1. What is the name of the hardware line that the CPU monitors after each instruction to detect an interrupt request?

💡 Difficulty: easy | ✅ Correct: A

Q2. Why should an operating system defer interrupt handling while executing a critical section of code?

💡 Difficulty: medium | ✅ Correct: A

Q3. In a system with a high‑priority timer interrupt and a low‑priority I/O interrupt, what happens if the timer interrupt arrives while the low‑priority handler is running?

💡 Difficulty: hard | ✅ Correct: B