📝 Building Blocks in Virtual Machines

Q1. A virtual machine needs to perform disk I/O on a host that supports hardware-assisted virtualization. Which building block most directly enables this capability?

💡 Difficulty: easy | ✅ Correct: C

Q2. In a dual‑mode CPU (user and kernel), a hypervisor must handle privileged instructions issued by a guest OS. Which technique allows the hypervisor to correctly manage these instructions without modifying the guest?

💡 Difficulty: medium | ✅ Correct: B

Q3. A cloud provider wants to run a hypervisor inside a guest VM to support nested virtualization. Which building block is essential to maintain performance and isolation for the inner guest?

💡 Difficulty: hard | ✅ Correct: C