Free RedHat EX188 Practice Exams

RedHat EX188 Practice Exams

Last updated on Oct 23,2026
  • Exam Code: EX188
  • Exam Name: Red Hat Certified Specialist in Containers
  • Certification Provider: RedHat
  • Latest update: Oct 23,2026
Question #371

Which option mounts a host directory as a read-only volume in a container?

  • A . -v /host:/container:ro
  • B . –mount /host:/container:ro
  • C . -v /host:/container:rw
  • D . –read-only

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Correct Answer: A
A

Explanation:

The :ro option mounts the directory in read-only mode, preventing modifications.
Question #372

What does podman volume prune do?

  • A . Lists all unused volumes
  • B . Deletes all unused volumes
  • C . Inspects all volumes
  • D . Exports all volumes

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Correct Answer: B
B

Explanation:

podman volume prune removes all unused volumes to free up storage space.
Question #373

Which Podman command updates the configuration of a running container?

  • A . podman update <container>
  • B . podman config <container>
  • C . podman modify <container>
  • D . podman restart <container>

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Correct Answer: A
A

Explanation:

The podman update command allows changes to the resource limits of a running container, such as CPU or memory limits.
Question #374

Which two commands display network information for a container? (Select two)

  • A . podman inspect
  • B . podman network ls
  • C . podman logs
  • D . podman network inspect

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Correct Answer: A, D
A, D

Explanation:

podman inspect shows network details for a specific container, while podman network inspect gives information about networks.
Question #375

What is a key security benefit of using the USER instruction in a Containerfile?

  • A . It prevents the container from running as root
  • B . It encrypts container data
  • C . It improves image build speed
  • D . It ensures image immutability

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Correct Answer: A
A

Explanation:

Using the USER instruction prevents the container from running with root privileges, reducing security risks.
Question #376

What is the effect of the –privileged option in Podman?

  • A . Grants the container full access to the host system
  • B . Restricts container capabilities
  • C . Runs the container in read-only mode
  • D . Prevents privilege escalation

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Correct Answer: A
A

Explanation:

The –privileged option gives the container full access to the host’s devices and capabilities, which can be a security risk.
Question #377

Which command lists all containers using a specific network?

  • A . podman network ls –containers
  • B . podman ps –network <network>
  • C . podman network inspect <network>
  • D . podman inspect –net <network>

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Correct Answer: C
C

Explanation:

podman network inspect <network> shows details, including which containers are using the network.
Question #378

Which instruction is used to define the base image in a Containerfile?

  • A . FROM
  • B . BASE
  • C . INIT
  • D . IMAGE

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Correct Answer: A
A

Explanation:

The FROM instruction sets the base image for the build process. It is mandatory in every Containerfile to establish the starting point for subsequent instructions.
Question #379

Which option mounts a directory read-only when using Podman?

  • A . -v /host:/container:ro
  • B . -v /host:/container:rw
  • C . -m /host:/container
  • D . –readonly

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Correct Answer: A
A

Explanation:

The :ro option in -v mounts the directory read-only, preventing write access from the container.
Question #380

How do you view the standard output of a running container?

  • A . podman stdout <container>
  • B . podman output <container>
  • C . podman logs <container>
  • D . podman show <container>

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Correct Answer: C
C

Explanation:

podman logs displays the standard output and error streams of a container.
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