305-300 Practice Test 10 — 10 Questions

Question 1

Which THREE of the following are valid Libvirt storage pool types?

Accepted Answer

iscsi. Libvirt supports various backends for storage including directories, LVM volume groups, and iSCSI targets.

Answer

ram

Answer

usb

Question 2

You need to convert a raw disk image to QCOW2 format to enable snapshotting. Which command is correct?

Accepted Answer

qemu-img convert -f raw -O qcow2 source.img target.qcow2. qemu-img convert -f raw -O qcow2 source.img target.qcow2 is the standard syntax.

Answer

qemu-img convert -i raw -o qcow2 source.img target.qcow2

Answer

virsh image-convert source.img target.qcow2

Answer

qemu-img change -f raw -t qcow2 source.img

Question 3

You have an active domain named 'myvm'. How do you gracefully shut it down?

Accepted Answer

virsh shutdown myvm. virsh shutdown myvm sends an ACPI signal to the guest for a graceful shutdown.

Answer

virsh stop myvm

Answer

virsh poweroff myvm

Answer

virsh destroy myvm

Question 4

Which THREE of the following are valid components of a libvirt domain XML configuration?

Accepted Answer

. , , and are standard top-level or child blocks in the domain XML.

Answer

<kernel-module>

Answer

<network-config>

Question 5

You are using Packer to build a custom image for KVM. Which HCL2 block is specifically required to define the virtualization parameters like memory and CPU for the builder?

Accepted Answer

qemuargs. The 'qemu' builder in Packer utilizes specific configuration blocks to define virtual hardware settings when interfacing with KVM/QEMU.

Answer

provisioners

Answer

post-processors

Answer

boot_command

Question 6

Which libvirt network type uses a bridge on the host to connect virtual machines directly to the physical network?

Accepted Answer

bridge. A 'bridge' network mode in libvirt attaches the guest NIC directly to an existing host bridge, allowing the guest to obtain an IP on the physical network.

Answer

nat

Answer

isolated

Answer

direct

Question 7

What does the term 'KVM' stand for?

Accepted Answer

Kernel-based Virtual Machine. Kernel-based Virtual Machine.

Answer

K-Hypervisor Virtual Machine

Answer

Kernel Virtual Module

Answer

Kilo-Virtual Machine

Question 8

Which command checks the status of the libvirtd service?

Accepted Answer

systemctl status libvirtd. systemctl status libvirtd is the standard method for checking service status on systemd systems.

Answer

service libvirtd status

Answer

libvirtd --check

Answer

virsh service-status

Question 9

Which THREE of the following are valid elements inside the <interface type='bridge'> block?

Accepted Answer

. , , and are valid sub-elements for a bridged interface.

Answer

Answer

Question 10

A cloud-init configuration file is failing to apply the 'write_files' module. Which log file on the target instance should you examine to diagnose the parsing error?

Accepted Answer

/var/log/cloud-init.log. Cloud-init logs all activities to /var/log/cloud-init.log, while /var/log/cloud-init-output.log captures stdout and stderr from the modules.

Answer

/var/log/syslog

Answer

/var/log/messages

Answer

/var/log/auth.log