A team is deploying a Windows VM on a KVM host. They notice that disk I/O performance is poor. The VM uses an emulated IDE disk. What should they do to improve storage performance?

Increase the guest's RAM to reduce the need for disk swapping.

Convert the disk image from raw to qcow2 format.

Enable write-back caching on the host filesystem.

Install the VirtIO storage drivers in the Windows guest and change the QEMU disk device to virtio-blk.

How does KVM integrate with QEMU to provide hardware-accelerated virtualization?

KVM replaces QEMU's device emulation with paravirtualized drivers

KVM is a userspace library that QEMU links against for faster binary translation

KVM is a kernel module that exposes /dev/kvm, which QEMU uses to run guest code directly on the host CPU

KVM provides a virtual network bridge that QEMU automatically attaches to

A VM configured with a tap device cannot reach other hosts on the LAN, but it can communicate with the host. The tap device is attached to a bridge. What is the most likely cause of this issue?

The tap device is not enabled for promiscuous mode.

The VM's network interface is configured with a user-mode networking address.

The bridge does not have an IP address or is not attached to the host's physical NIC.

The QEMU process is not running with root privileges.

A sysadmin wants to run commands inside a QEMU guest from the host to automate application deployment. The guest is a Linux VM. What must be done to enable this capability?

Install the qemu-guest-agent package in the guest and start the QEMU Guest Agent service.

Use the QEMU monitor's sendkey command to type commands into the guest console.

Add the -virtio-serial-pci device to the QEMU command line and install VirtIO drivers in the guest.

Enable SSH in the guest and configure key-based authentication from the host.

LPIC-3 Virtualization and Containerization

Domain 1Objective 3

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

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 11–15

11application · medium
A team is deploying a Windows VM on a KVM host. They notice that disk I/O performance is poor. The VM uses an emulated IDE disk. What should they do to improve storage performance?
Select an answer first
12foundation · easy
How does KVM integrate with QEMU to provide hardware-accelerated virtualization?
Select an answer first
13application · medium
A VM configured with a tap device cannot reach other hosts on the LAN, but it can communicate with the host. The tap device is attached to a bridge. What is the most likely cause of this issue?
Select an answer first
14application · medium
A sysadmin wants to run commands inside a QEMU guest from the host to automate application deployment. The guest is a Linux VM. What must be done to enable this capability?
Select an answer first
15foundation · easy
Which QEMU networking model provides a virtual NAT'd network that requires no host configuration or root privileges?
Select an answer first

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