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📝 XDS-940 operating system

📖 From Operating System • 20. Influential Operating Systems • 8 questions available

Practice MCQs for XDS-940 operating system. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-27

2
Easy Questions
4
Medium Questions
2
Hard Questions

📝 Sample Questions

Q1. If a CPU can process input twice as fast as a single card reader can read cards, how many card readers working simultaneously are needed to keep the CPU continuously busy?

🔹 A. 1
🔹 B. 2
🔹 C. 3
🔹 D. 4

💡 Difficulty: easy | ✅ Correct: B

Q2. A batch system has three card readers and one tape drive. The CPU can process data at three times the speed of a single card reader. Will the CPU be idle while jobs are being prepared?

🔹 A. Yes, it will be idle
🔹 B. No, it will not be idle
🔹 C. It depends on the tape drive speed
🔹 D. Cannot be determined from the information given

💡 Difficulty: medium | ✅ Correct: B

Q3. A CPU reads from tape at 100 MB/s while a card reader writes at 30 MB/s. Approximately how many simultaneous card readers are required to keep the CPU fully utilized?

🔹 A. 2
🔹 B. 3
🔹 C. 4
🔹 D. 5

💡 Difficulty: hard | ✅ Correct: C

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🔗 Related Topics

📝 Feature Migration in Operating Systems📝 Early Computer Systems📝 Dedicated computer systems📝 Shared computer systems📝 Overlapped I/O operating system
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