Which component of QEMU is responsible for translating guest instructions to run on the host CPU when hardware acceleration is not available?

The memory management unit (MMU) emulation layer

The device emulation framework (e.g., virtio)

The virtual CPU (vCPU) using binary translation

A QEMU VM using a tap device attached to a bridge can ping the host but cannot ping other hosts on the LAN. The bridge has the host's physical NIC as a member. What is the most likely cause?

The host's physical NIC is not in promiscuous mode.

The tap device is not enabled for forwarding.

The bridge does not have an IP address assigned.

The VM's IP address is on a different subnet than the LAN.

A developer has a raw disk image that has grown to 50 GB on disk, but the VM only uses 10 GB of space inside. The developer wants to reduce the host storage footprint while keeping the ability to take snapshots. What should the developer do?

Shrink the raw image using qemu-img resize.

Mount the raw image and delete unused files inside it.

Convert the raw image to qcow2 format using qemu-img convert.

Use the dd command to copy the raw image to a smaller file.

A QEMU VM using user-mode networking cannot be reached from the host via SSH. What is the most likely cause?

The host firewall is blocking all traffic

The guest's SSH service is not running

The VM's network cable is unplugged

User-mode networking does not allow inbound connections by default; you must set up port forwarding

A team runs a production QEMU VM on a raw disk image. They need to implement a backup strategy that allows point-in-time recovery with minimal downtime. They are considering: (1) converting to qcow2 and using internal snapshots, (2) using external snapshots with qemu-img, and (3) shutting down the VM and copying the raw image. Which approach best balances recovery granularity and downtime?

Use external snapshots with qemu-img, creating a new overlay image while the VM continues running.

Use the QEMU Guest Agent to freeze the filesystem and copy the raw image while the VM is running.

Convert to qcow2 and use internal snapshots via the QEMU monitor.

Shut down the VM and copy the raw image to a backup location.

LPIC-3 Virtualization and Containerization

Domain 1Objective 3

351.3 QEMU (weight: 4) LPIC-3-VIRTUALIZATION Practice Questions (Page 1)

Part of the Topic 351: Full Virtualization domain, which makes up ~39% of our current practice bank. Linux Professional Institute does not publish an official question count, but from its 90-minute exam (~35–60 total, ~14–23 in this domain), expect 3–5 from this objective — we provide 34 practice questions to prepare you well beyond it. (estimate)

34questions here

7free pages

12concepts

Questions 1–5

1foundation · easy
Which component of QEMU is responsible for translating guest instructions to run on the host CPU when hardware acceleration is not available?
Select an answer first
2expert · hard
A QEMU VM using a tap device attached to a bridge can ping the host but cannot ping other hosts on the LAN. The bridge has the host's physical NIC as a member. What is the most likely cause?
Select an answer first
3application · medium
A developer has a raw disk image that has grown to 50 GB on disk, but the VM only uses 10 GB of space inside. The developer wants to reduce the host storage footprint while keeping the ability to take snapshots. What should the developer do?
Select an answer first
4foundation · easy
A QEMU VM using user-mode networking cannot be reached from the host via SSH. What is the most likely cause?
Select an answer first
5expert · hard
A team runs a production QEMU VM on a raw disk image. They need to implement a backup strategy that allows point-in-time recovery with minimal downtime. They are considering: (1) converting to qcow2 and using internal snapshots, (2) using external snapshots with qemu-img, and (3) shutting down the VM and copying the raw image. Which approach best balances recovery granularity and downtime?
Select an answer first

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