305-300 Practice Test 5 — 25 Questions

Question 1

You are configuring a Xen guest that requires direct hardware access to a specific network interface card. Which configuration parameter in the guest domain configuration file must be specified to enable PCI passthrough?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

pci = [ '00:1f.1' ]. The pci option in the Xen domain configuration file allows passing through physical PCI devices to the guest domain.

Answer

device_pass = 'eth0'

Answer

hw_access = '00:1f.1'

Answer

vif = [ 'type=pci, bus=00:1f.1' ]

Question 2

What is the default location for libvirt domain configuration XML files?

Accepted Answer

/etc/libvirt/qemu/. /etc/libvirt/qemu/ contains the XML definitions for KVM/QEMU domains.

Answer

/var/lib/libvirt/domains/

Answer

/etc/libvirt/networks/

Answer

/usr/share/libvirt/

Question 3

Which TWO of the following commands can be used to monitor VM resource utilization?

Accepted Answer

virsh domstats. virsh domstats and top (or virt-top) are used for monitoring.

Answer

virsh show-stats

Answer

virsh monitor-cpu

Answer

virsh check-load

Question 4

When defining a Vagrant network configuration for a libvirt provider, which mode allows the VM to receive an IP address directly from the physical network's DHCP server?

Accepted Answer

public_network. The 'public_network' mode bridges the VM's interface to the host's physical network interface, allowing it to act like a physical machine on that segment.

Answer

nat

Answer

forwarded_port

Answer

private_network

Question 5

Which TWO components are defined in a Packer 'build' block?

Accepted Answer

sources. A build block contains the 'sources' (builders) and 'provisioners' to be executed on those sources.

Answer

builders

Answer

plugins

Answer

variables

Question 6

When managing storage pools using virsh, which command would you use to list all defined storage pools, including those that are inactive?

Accepted Answer

virsh pool-list --all. virsh pool-list --all displays all pools regardless of their current status.

Answer

virsh list-pools --inactive

Answer

virsh pool-info --all

Answer

virsh pool-show --all

Question 7

You are configuring a virtual network with a static IP address for a VM. Where do you define the DHCP host entry in the libvirt network XML?

Accepted Answer

. The element inside the block of a definition is used for static leases.

Answer

<ip-assignment mac='...' ip='...'/>

Answer

<dhcp-host mac='...' ip='...'/>

Answer

<static-ip mac='...' ip='...'/>

Question 8

When configuring a VM in libvirt, you want to ensure the highest performance for disk I/O. Which driver type should you select for the disk device?

Accepted Answer

Virtio. Virtio is the paravirtualized driver standard for high-performance I/O in libvirt/KVM environments.

Answer

SCSI

Answer

IDE

Answer

SATA

Question 9

When configuring cloud-init 'network-config', which format is primarily used to describe network interfaces?

Accepted Answer

YAML. Cloud-init uses the 'network-config' key, often structured using the 'v1' (YAML) or 'v2' (Netplan) format.

Answer

Shell

Answer

INI

Answer

JSON

Question 10

A VM is hanging because of a specific hardware emulation bug in QEMU. You need to enable the 'qxl' video device to see if it resolves display issues. What is the XML tag to define the video device in the domain config?

Accepted Answer

<video><model type='qxl'/></video>. The <video> tag with a <model type='qxl'/> sub-tag defines the video device.

Answer

Answer

Answer

Question 11

What is the purpose of the 'virt-install' tool?

Accepted Answer

Provisioning new virtual machines. virt-install is a command-line tool for provisioning new virtual machines.

Answer

Migrating virtual machines

Answer

Monitoring VM performance

Answer

Editing VM XML

Question 12

Which hypervisor is known for being 'Type 2'?

Accepted Answer

VirtualBox. VirtualBox and VMware Workstation are hosted hypervisors (Type 2).

Answer

KVM

Answer

ESXi

Answer

Xen

Question 13

Which THREE of the following are valid options for 'virsh shutdown'?

Accepted Answer

--mode acpi. The --mode flag can accept 'acpi', 'agent', and 'initctl'.

Answer

--mode force

Answer

--mode hard

Question 14

You need to change the MAC address of a network interface for a virtual machine. Where is this configured?

Accepted Answer

Inside the tag of the VM XML. The MAC address is configured within the block of the domain XML.

Answer

Via the 'virsh set-mac' command

Answer

In the qemu-system-x86_64 startup parameters

Answer

In the host's /etc/network/interfaces

Question 15

Which utility is best for creating a new libvirt storage pool?

Accepted Answer

virsh pool-define-as. virsh pool-define-as is the command to create a pool definition.

Answer

virsh pool-create

Answer

virt-pool-builder

Answer

virsh add-pool

Question 16

Which TWO of the following are common ways to connect to a virtual machine's console?

Accepted Answer

VNC. VNC and Spice are the standard remote display protocols for KVM guests.

Answer

Telnet

Answer

HTTP

Answer

FTP

Question 17

Which of these is a valid virtualization storage pool type supported by libvirt?

Accepted Answer

dir. 'dir' is a common storage pool type that uses a directory in the host filesystem.

Answer

cpu

Answer

interface

Answer

network

Question 18

What is the purpose of the 'virsh' tool?

Accepted Answer

To manage virtual domains. virsh is the main command-line interface for managing libvirt-based virtualization.

Answer

To monitor host CPU temperature

Answer

To compile QEMU

Answer

To write disk images to USB

Question 19

Which THREE of the following are valid virtio device types?

Accepted Answer

virtio-scsi. virtio-blk, virtio-net, and virtio-scsi are standard virtio devices.

Answer

virtio-keyboard

Answer

virtio-mouse

Question 20

What is the purpose of the virtio-balloon driver in a guest?

Accepted Answer

To enable memory ballooning. The balloon driver allows the host to communicate with the guest for memory reclaiming.

Answer

To speed up network transfers

Answer

To provide disk caching

Answer

To enable 3D graphics