📝 Performance of demand paging

Q1. A system has a memory access time of 100 ns, a page‑fault service time of 8 ms, and a fault rate of 0.001. What is the effective access time (EAT) in microseconds?

💡 Difficulty: easy | ✅ Correct: B

Q2. A computer has a memory access time of 200 ns, a page‑fault service time of 5 ms, and wants an effective access time of 2 µs. What is the maximum allowable page‑fault rate?

💡 Difficulty: medium | ✅ Correct: D

Q3. A system has a page‑fault service time of 6 ms and a memory access time of 150 ns. To keep CPU utilization above 95%, what is the maximum permissible page‑fault rate?

💡 Difficulty: hard | ✅ Correct: D