EX188 Timed Practice Test 3 — 10 Questions

Question 1

A container named 'metrics' has been running for several hours, and an engineer needs to inspect its current resource consumption (CPU, memory, and network I/O usage). Which Podman command provides a live-updating stream of resource usage statistics for running containers?

10 minute time limit — choose an answer to begin.

Accepted Answer

podman stats metrics. The 'podman stats' command displays a live stream of resource usage statistics for specified containers.

Answer

podman inspect metrics

Answer

podman top metrics

Answer

podman system df metrics

Question 2

An administrator wants to run a container with a custom health check command that disables health checking entirely for a container that inherited one from its base image. Which flag achieves this?

Accepted Answer

--health-cmd=none. Setting --health-cmd=none disables the health check inherited from the base image.

Answer

--health-enabled=false

Answer

--disable-health

Answer

--no-healthcheck

Question 3

An administrator is troubleshooting process execution and live configuration updates on a running container. Which TWO commands allow interacting with processes or updating resource limits on the fly? (Choose TWO)

Accepted Answer

podman update. podman top shows container processes, and podman update modifies container resources live.

Answer

podman exec-top

Answer

podman adjust

Answer

podman modify

Question 4

You are troubleshooting a build where a RUN instruction fails because it cannot reach a remote URL to download a file. The local network uses an HTTP proxy. How should you pass the proxy settings to the build command without hardcoding them into the image?

Accepted Answer

podman build --build-arg HTTP_PROXY=http://proxy.example.com:8080 .. Build arguments can be passed via --build-arg to provide proxy settings dynamically.

Answer

podman build --proxy http://proxy.example.com:8080 .

Answer

podman build --env HTTP_PROXY=http://proxy.example.com:8080 .

Answer

podman build --set-proxy http://proxy.example.com:8080 .

Question 5

An auditor notices that a container image runs its main application process as the 'root' user by default. Which Containerfile instruction can be added to ensure the container runs as a non-privileged user named 'appuser'?

Accepted Answer

RUN useradd -u 1000 appuser && chown -R appuser /app
USER appuser. Using USER appuser ensures that subsequent commands and the runtime process execute under that user account.

Answer

EXEC appuser

Answer

PRIVILEGE drop appuser

Answer

SECURITY --user=appuser

Question 6

An administrator needs to check the disk space consumption of all containers, images, and volumes managed by Podman. Which command should be run?

Accepted Answer

podman system df. podman system df shows disk usage by Podman objects.

Answer

podman storage show

Answer

podman disk usage

Answer

podman inspect --disk

Question 7

An administrator is configuring container health checks and wants to review health status or force immediate actions. Which TWO of the following statements or commands are accurate regarding Podman health checks? (Choose TWO)

Accepted Answer

podman inspect --format='{{json .State.Health.Status}}' can be used to check container health status.. podman inspect with health format templates can retrieve health status, and health checks can be defined at run time using --health-cmd.

Answer

Container health statuses are automatically logged to /var/log/podman-health.log on the host.

Answer

podman stop automatically triggers a health check before shutting down.

Answer

podman health-check status is a valid built-in standalone top-level command.

Question 8

An administrator needs to view logs or attach to a running container to troubleshoot an issue. Which TWO commands can be used to interact with container output streams? (Choose TWO)

Accepted Answer

podman attach. podman logs retrieves logged output, and podman attach connects to container input/output streams.

Answer

podman stream

Answer

podman view-logs

Answer

podman output

Question 9

An administrator needs to clean up stopped containers and unused data to reclaim disk space. Which TWO commands can be used to remove containers? (Choose TWO)

Accepted Answer

podman rm. podman rm removes specified containers, and podman container prune removes all stopped containers.

Answer

podman image prune

Answer

podman rmi

Answer

podman system clean

Question 10

An administrator wants to modify container settings or state. Which TWO of the following commands are valid Podman subcommands for container management? (Choose TWO)

Accepted Answer

podman restart. podman rename and podman restart are valid subcommands.

Answer

podman reconfigure

Answer

podman alter

Answer

podman modify