EX188 Container Operations And Lifecycle Practice Test 3 — 15 Questions

Question 1

An administrator needs to commit the changes made to a running container named test_lab into a new image named my_custom_img:latest. Which command should be used?

Accepted Answer

podman commit test_lab my_custom_img:latest. podman commit creates a new image from a container's changes.

Answer

podman create-image test_lab my_custom_img:latest

Answer

podman save test_lab my_custom_img:latest

Answer

podman build --container test_lab -t my_custom_img:latest

Question 2

An administrator needs to inspect container health check logs to determine why recent health checks failed for a container named app_prod. Which command displays the container's health check log history?

Accepted Answer

podman inspect --format='{{json .State.Health.Log}}' app_prod. inspecting State.Health.Log within podman inspect shows recent health check execution details and error outputs.

Answer

podman logs --health app_prod

Answer

podman health-log app_prod

Answer

podman events --health app_prod

Question 3

An administrator is configuring a systemd service using podman generate systemd and wants the generated service to stop and remove the container automatically when the service stops, and create a fresh container when it starts. Which flag should be added?

Accepted Answer

--new. The --new flag tells podman generate systemd to create a unit file that runs podman run (creating a new container) rather than podman start (using an existing container).

Answer

--ephemeral

Answer

--recreate

Answer

--auto-remove

Question 4

An administrator needs to copy a directory named /app/logs from a running container named prod_app to the local host directory /var/backups/. Which command accomplishes this?

Accepted Answer

podman cp prod_app:/app/logs /var/backups/. podman cp supports copying from a container path to a host path using container_path:host_path syntax.

Answer

podman export --path /app/logs prod_app /var/backups/

Answer

podman pull prod_app:/app/logs /var/backups/

Answer

podman download prod_app:/app/logs /var/backups/

Question 5

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 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 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 8

An administrator is troubleshooting container startup failures and wants to inspect the exact entrypoint and command arguments configured for a container named app_run before it starts. Which inspect format expression retrieves this?

Accepted Answer

podman inspect --format='{{.Config.Entrypoint}} {{.Config.Cmd}}' app_run. The entrypoint and command arguments are stored in .Config.Entrypoint and .Config.Cmd.

Answer

podman ps --format='{{.Command}}' app_run

Answer

podman inspect --format='{{.State.Command}}' app_run

Answer

podman inspect --format='{{.Args}}' app_run

Question 9

An administrator wants to view a list of all running containers in a clean, tabular format without stopping containers or showing extra metadata. Which command should be used?

Accepted Answer

podman ps. podman ps lists running containers by default.

Answer

podman show running

Answer

podman list

Answer

podman containers

Question 10

An administrator has a container that failed to start correctly. They want to inspect the exit code and finished timestamp. Which inspect format string provides the finished time?

Accepted Answer

podman inspect --format='{{.State.FinishedAt}}' failed_app. Container lifecycle timestamps such as FinishedAt are stored under .State.

Answer

podman inspect --format='{{.Time.Ended}}' failed_app

Answer

podman inspect --format='{{.Finished}}' failed_app

Answer

podman ps --format='{{.FinishedAt}}' failed_app

Question 11

An administrator is managing rootless containers and wants to enable systemd linger for their user account so that user-level container services continue running after the user logs out. Which command should be run?

Accepted Answer

loginctl enable-linger. loginctl enable-linger enables systemd user services to persist after logout for rootless users.

Answer

systemctl enable --user --linger

Answer

podman system linger enable

Answer

usermod --linger=true $USER

Question 12

An administrator needs to manage container lifecycles in Podman. Which TWO of the following commands can be used to start an existing, stopped container? (Choose TWO)

Accepted Answer

podman start. podman start and podman restart (which starts a stopped or running container) can be used to start stopped containers. podman run creates a new container, and podman exec runs commands in running containers.

Answer

podman exec

Answer

podman run

Answer

podman up

Question 13

An administrator is troubleshooting a misbehaving container and needs to examine its output logs and event history. Which TWO commands are appropriate for this task? (Choose TWO)

Accepted Answer

podman logs. podman logs retrieves container stdout/stderr, and podman events streams system-wide container events.

Answer

podman inspect-logs

Answer

podman history

Answer

podman trace

Question 14

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 15

An administrator wants to temporarily pause a running container's processes and later resume them. Which TWO commands should be used? (Choose TWO)

Accepted Answer

podman unpause. podman pause suspends container processes, and podman unpause resumes them.

Answer

podman freeze

Answer

podman resume

Answer

podman stop