305-300 Multiple Select — 10 Questions

Question 1

Which TWO of the following commands can be used to manage virtual networks in libvirt?

Accepted Answer

virsh net-define. virsh net-list and virsh net-define are standard commands.

Answer

virsh net-config

Answer

virsh net-start-all

Answer

virsh net-status

Question 2

Which THREE of the following attributes can be defined within the <memoryBacking> XML block?

Accepted Answer

<hugepages/>. hugepages, locked, and source (type) are all valid components of memory backing.

Answer

<swap-limit/>

Answer

<balloon-rate/>

Question 3

Which THREE networking modes are natively supported by Docker?

Accepted Answer

bridge. Bridge, host, and none are standard Docker network drivers.

Answer

gateway

Answer

tunnel

Question 4

Which TWO commands are used to manage images in Docker?

Accepted Answer

docker tag. 'docker build' creates images, and 'docker tag' renames/labels them.

Answer

docker run

Answer

docker create

Answer

docker attach

Question 5

You are optimizing a Dockerfile to reduce image size. Which THREE of the following practices are recommended?

Accepted Answer

Remove /var/lib/apt/lists/* after installing packages. Multi-stage builds, minimizing layers, and cleaning up caches are standard practices.

Answer

Use the FROM latest tag for all base images

Answer

Always install recommended packages for security

Question 6

Which THREE storage drivers are supported by Docker?

Accepted Answer

devicemapper. Overlay2, devicemapper, and aufs are well-known Docker storage drivers.

Answer

xfs

Answer

ext4

Question 7

Which TWO commands are valid for inspecting container network settings?

Accepted Answer

docker inspect. 'docker inspect' provides detailed JSON, and 'docker network inspect' shows network-specific details.

Answer

docker show net

Answer

docker net status

Answer

docker list network

Question 8

Which THREE instructions in a Dockerfile can modify the image's filesystem?

Accepted Answer

ADD. RUN, COPY, and ADD all add or modify content within the image layers.

Answer

ENV

Answer

EXPOSE

Question 9

Which THREE items are typically included in an OpenVZ configuration file?

Accepted Answer

User Beancounters (resource limits). OpenVZ configs contain networking definitions, resource limits (UBC), and OS template references.

Answer

BIOS settings

Answer

Kernel source code

Question 10

Which TWO items are typically included in a Docker context?

Accepted Answer

Local files in the build directory. The Docker context includes the Dockerfile and the build directory contents.

Answer

The host kernel

Answer

Remote images

Answer

Running containers