📝 Virtual Memory examples in Windows

Q1. What is the purpose of the modify (dirty) bit in a page frame?

💡 Difficulty: easy | ✅ Correct: B

Q2. Why does checking the modify bit before writing a victim page reduce overall page‑fault service time?

💡 Difficulty: medium | ✅ Correct: A

Q3. Given three frames with LRU order: Frame 1 (modify = 1), Frame 2 (modify = 0), Frame 3 (modify = 1). The LRU algorithm selects the least‑recently‑used frame. Which frame will be written to disk as part of the replacement?

💡 Difficulty: hard | ✅ Correct: D