📝 The Java virtual machine

📖 From Operating System • 16. Virtual Machines • 12 questions available

Practice MCQs for The Java virtual machine. 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. An administrator configures two zones on a Solaris 10 host and assigns each zone 50 % of the physical CPU capacity. Which statement best describes how each zone’s scheduler will treat its CPU resources?

🔹 A. Each zone will see two virtual CPUs and schedule them as if they were dedicated cores.

🔹 B. Each zone will perceive a single virtual CPU that can use the full physical CPU, but the global scheduler limits actual usage to 50 %.

🔹 C. Each zone receives a fixed time slice that guarantees exactly half of every CPU cycle.

🔹 D. Each zone’s scheduler is unaware of the physical limit and may over‑commit CPU time.

💡 Difficulty: easy | ✅ Correct: B

Q2. A zone is allocated 2 GB of memory, but a Java application inside the zone requires 3 GB. What is the most likely outcome?

🔹 A. The application will run normally because zones can borrow memory from the global pool.

🔹 B. The zone will trigger swapping, potentially degrading performance.

🔹 C. The VMM will automatically expand the zone’s memory limit to satisfy the request.

🔹 D. The application will fail to start with an OutOfMemoryError.

💡 Difficulty: medium | ✅ Correct: B

Q3. Why are Solaris zones considered lighter‑weight than full hardware virtualization solutions such as Xen or VMware?

🔹 A. Zones share the same kernel and avoid emulating hardware devices, reducing overhead.

🔹 B. Zones duplicate the entire operating system image, increasing memory usage.

🔹 C. Zones require a separate hypervisor that adds extra processing steps.

🔹 D. Zones virtualize the CPU using binary translation, which is slower than hardware assistance.

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Overview Virtual Machines 📝 History Virtual Machines 📝 Benefits and Features Virtual Machines 📝 Building Blocks in Virtual Machines 📝 Trap and emulate in Building Blocks

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