EX188 Practice Test 2 — 10 Questions

Question 1

An administrator wants to forcefully kill a running container named runaway_job immediately by sending the SIGKILL signal. Which command should be used?

Accepted Answer

podman kill runaway_job. podman kill sends signals to containers, defaulting to SIGKILL.

Answer

podman terminate runaway_job

Answer

podman halt runaway_job

Answer

podman stop --force runaway_job

Question 2

Which instruction should be used in a Containerfile to copy local files from the host machine into the container filesystem?

Accepted Answer

COPY. The COPY instruction takes files from the local context and adds them to the container's filesystem.

Answer

TRANSFER

Answer

ADD

Answer

MOVE

Question 3

A container named api_gw is configured with a health check. An administrator needs to check the current health status (e.g., healthy, unhealthy, starting) using the command line without reading the full inspect JSON. Which command string achieves this?

Accepted Answer

podman inspect --format='{{json .State.Health.Status}}' api_gw. Using format strings with podman inspect allows extracting specific fields like the health status directly.

Answer

podman health status api_gw

Answer

podman ps --filter health=unhealthy

Answer

podman status api_gw

Question 4

An administrator needs to view the processes running inside a specific container named worker_node, along with custom ps options like -ef to see full command arguments. Which command accomplishes this?

Accepted Answer

podman top worker_node -ef. podman top displays the running processes of a container and accepts ps-compatible argument flags.

Answer

podman ps --processes worker_node

Answer

podman exec worker_node ps -ef

Answer

podman inspect --processes worker_node

Question 5

A security engineer is troubleshooting why signature verification fails when pulling an image from a trusted registry. The policy file (/etc/containers/policy.json) specifies 'signedBy' using a GPG key, but the transport uses 'dir://'. Where must the public GPG key be imported for Podman to successfully verify the signature?

Accepted Answer

Into the local GnuPG keyring using 'gpg --import'. Public keys used for verification must be imported into the local GPG keyring managed by GnuPG.

Answer

Into ~/.config/containers/policy.d/keys/

Answer

Into /etc/containers/certs.d/keys/

Answer

Into /var/lib/containers/sigstore/

Question 6

An administrator needs to inspect low-level configuration, network settings, and state details of a running container named redis_cache in JSON format. Which command provides this?

Accepted Answer

podman inspect redis_cache. podman inspect provides detailed configuration and state information about containers, images, and other objects in JSON.

Answer

podman show redis_cache

Answer

podman details redis_cache

Answer

podman query --json redis_cache

Question 7

An administrator is troubleshooting container exit codes. A container exited with code 137. What does this specific exit code typically signify in container engines?

Accepted Answer

The container was terminated forcefully by SIGKILL (often due to Out-Of-Memory).. Exit code 137 indicates that the container process was terminated forcibly by the OOM killer or SIGKILL (128 + 9).

Answer

The container executed an invalid system call blocked by seccomp.

Answer

The container encountered an application-level syntax error.

Answer

The container startup script had a permission denied error.

Question 8

An administrator wants to view the last 50 lines of logs for a running container named log_test and keep the log stream open for new entries. Which command should be used?

Accepted Answer

podman logs --tail 50 --follow log_test. The --tail and --follow (or -f) flags in podman logs control line limits and streaming.

Answer

podman tail 50 log_test

Answer

podman log-stream --lines=50 log_test

Answer

podman inspect --tail=50 log_test

Question 9

An administrator needs to inspect running containers and their resource consumption. Which TWO commands provide information about running container state or resource usage? (Choose TWO)

Accepted Answer

podman stats. podman ps lists containers, and podman stats displays live resource usage statistics.

Answer

podman storage

Answer

podman images

Answer

podman network ls

Question 10

A container named 'app_prod' is currently running, and an operator needs to troubleshoot its current configuration, network settings, and mounted volumes in detail. Which THREE commands or approaches can retrieve this information? (Choose THREE)

Accepted Answer

Run 'podman inspect app_prod' to output comprehensive JSON-formatted metadata regarding configuration, mounts, and network settings.. Podman provides several ways to inspect running containers, including 'podman inspect', 'podman port', and 'podman exec' / 'podman top'.

Answer

Run 'podman config app_prod' to print a summary of environment variables and limits.

Answer

Run 'podman diff app_prod' to view changes to the container's file system, which is primarily used for tracking modifications rather than initial configuration.