LCA Virtualization & Container Management 3

Question 1

In Podman, which command replaces 'docker-compose' for multi-container pod management?

Accepted Answer

podman-compose or podman play kube

Answer

podman-compose and 'podman play kube' both handle multi-container workloads as Podman alternatives to docker-compose.

Question 2

What virtualization type does Xen use when running unmodified guest OS kernels?

Accepted Answer

Full virtualization (HVM)

Answer

Xen HVM (Hardware Virtual Machine) mode uses CPU extensions (Intel VT-x/AMD-V) to run unmodified guest kernels.

Question 3

Which namespace type isolates process IDs between containers?

Accepted Answer

pid namespace

Answer

PID namespaces give each container its own process ID numbering, so PIDs don't collide between containers.

Question 4

What does the Docker instruction 'ENTRYPOINT' define?

Accepted Answer

The default executable run when the container starts

Answer

ENTRYPOINT sets the main command that always runs when the container starts, making the container behave like an executable.

Question 5

Which virsh command lists all defined virtual machine domains, including inactive ones?

Accepted Answer

virsh list --all

Answer

'virsh list --all' shows both running (active) and stopped (inactive) domain definitions.

(LCA) Certified Linux Administrator Practice Test