Free RedHat EX188 Practice Exams

RedHat EX188 Practice Exams

Last updated on Oct 22,2026
  • Exam Code: EX188
  • Exam Name: Red Hat Certified Specialist in Containers
  • Certification Provider: RedHat
  • Latest update: Oct 22,2026
Question #291

What happens if a container runs with the –read-only option?

  • A . The filesystem becomes immutable
  • B . The container runs in the background
  • C . The container uses named volumes
  • D . The container auto-restarts

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Correct Answer: A
A

Explanation:

The –read-only option makes the container’s filesystem immutable, preventing any changes.
Question #292

Which instruction sets the default working directory inside a container?

  • A . WORKDIR
  • B . CMD
  • C . ENTRYPOINT
  • D . RUN

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Correct Answer: A
A

Explanation:

The WORKDIR instruction sets the default working directory for subsequent instructions.
Question #293

Which command lists all the exposed ports of a container?

  • A . podman ports <container>
  • B . podman ps –ports
  • C . podman inspect <container>
  • D . podman netstat <container>

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Correct Answer: A
A

Explanation:

The podman port command shows all ports mapped between the container and host.
Question #294

Which tool is used for copying images between different registries?

  • A . podman copy
  • B . skopeo copy
  • C . podman transfer
  • D . skopeo push

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Correct Answer: B
B

Explanation:

skopeo copy transfers images between registries without storing them locally, useful for mirroring or migrating images.
Question #295

Which Podman command displays the size of container images?

  • A . podman images
  • B . podman size
  • C . podman inspect
  • D . podman stats

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Correct Answer: A
A

Explanation:

The podman images command lists all images and displays their sizes, helping you manage storage effectively.
Question #296

Which command shows the layers of an image and the commands used to create them?

  • A . podman inspect <image>
  • B . podman history <image>
  • C . podman view <image>
  • D . podman diff <image>

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Correct Answer: B
B

Explanation:

podman history displays the image’s layer history, showing the commands and their respective sizes.
Question #297

Which option forces a container to use a read-only filesystem?

  • A . –read-only
  • B . –rofs
  • C . –no-write
  • D . –immutable

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Correct Answer: A
A

Explanation:

The –read-only option ensures the container’s filesystem is immutable, enhancing security.
Question #298

Which option allows you to set environment variables for a container during runtime?

  • A . –env
  • B . –set-env
  • C . –variables
  • D . –export-env

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Correct Answer: A
A

Explanation:

The –env option sets environment variables for the container, allowing configuration without modifying the image.
Question #299

What does podman inspect -f ‘{{.State.Status}}’ <container> display?

  • A . Container creation time
  • B . Container state (running, stopped, etc.)
  • C . Container logs
  • D . Container network settings

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Correct Answer: B
B

Explanation:

This Go template extracts the current state of the container (e.g., running, stopped).
Question #300

What is the purpose of using podman commit?

  • A . Backing up a container’s filesystem state as an image
  • B . Pushing a container to a registry
  • C . Exporting an image to a tar file
  • D . Restoring a container from an image

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Correct Answer: A
A

Explanation:

podman commit saves the current state of a container as a new image, including changes made during runtime.
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