📝 Interprocess communication using Windows 7 messaging

📖 From Operating System • 19. Windows 7 • 8 questions available

Practice MCQs for Interprocess communication using Windows 7 messaging. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

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📝 Sample Questions

Q1. What does the abbreviation APC stand for in Windows kernel terminology?

🔹 A. Asynchronous Procedure Call

🔹 B. Automatic Process Control

🔹 C. Advanced Priority Context

🔹 D. Atomic Process Communication

💡 Difficulty: easy | ✅ Correct: A

Q2. A driver receives a hardware timer interrupt and queues a DPC to handle the timer expiration. Which of the following best describes the order in which the ISR, DPC, and normal thread execution will occur?

🔹 A. ISR → normal thread → DPC

🔹 B. ISR → DPC → normal thread

🔹 C. normal thread → ISR → DPC

🔹 D. DPC → ISR → normal thread

💡 Difficulty: medium | ✅ Correct: A

Q3. Why are DPC routines prohibited from accessing pageable memory, and what could happen if this rule is violated?

🔹 A. Accessing pageable memory may cause a page fault at DISPATCH_LEVEL, leading to a system crash

🔹 B. Pageable memory is encrypted, so DPCs cannot read it

🔹 C. The kernel automatically swaps pageable memory, which slows down DPCs but is safe

🔹 D. Violating the rule results in a compile‑time error, preventing the driver from loading

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 History of Windows 7 📝 Security in Windows 7 📝 Reliability of Windows 7 📝 Windows and POSIX application compatibility 📝 Windows 7 designed for High performance

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