- A
Assign each container a unique hostname using the --hostname flag
Why wrong: Within a pod, containers already resolve each other by container name; adding hostnames is redundant and does not fix the DNS issue.
- B
Recreate both containers with --net=host to share the host's network stack
Why wrong: Using --net=host would remove network isolation and is unnecessary; it would not solve the DNS resolution issue within the pod.
- C
Use 'podman pod inspect webpod' to verify both containers are part of the pod; if not, remove and recreate the containers using '--pod webpod' correctly
The most likely cause is that the containers were not properly added to the same pod; inspecting the pod will confirm their membership, and recreating them with the correct flag will enable automatic DNS resolution.
- D
Add entries to the /etc/hosts file of the webserver container using --add-host database:$(podman inspect --format '{{.NetworkSettings.IPAddress}}' database)
Why wrong: While this workaround might allow connectivity, it is not the correct solution because the root cause (containers not in the same pod) is not addressed; also the IP might change on restart.
EX200 Manage containers Practice Question
This EX200 practice question tests your understanding of manage containers. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An administrator creates a Podman pod named 'webpod' and adds two containers: 'webserver' and 'database'. Both containers are added using 'podman pod create --name webpod' followed by 'podman run --pod webpod --name webserver nginx' and 'podman run --pod webpod --name database postgres'. The administrator wants the webserver container to be able to reach the database container by the hostname 'database'. However, when the administrator executes 'podman exec webserver ping database', the ping fails with 'ping: database: Name or service not known'. Which of the following is the most likely cause and correct solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use 'podman pod inspect webpod' to verify both containers are part of the pod; if not, remove and recreate the containers using '--pod webpod' correctly
Option C is correct because Podman pods create a shared network namespace by default, enabling DNS-based container discovery. The ping failure indicates the containers are not sharing the same pod network namespace, likely due to a misconfiguration such as using 'podman run' without the '--pod' flag or a typo. Verifying with 'podman pod inspect webpod' and recreating the containers with '--pod webpod' ensures they are in the same pod, allowing DNS resolution of container names as hostnames.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign each container a unique hostname using the --hostname flag
Why it's wrong here
Within a pod, containers already resolve each other by container name; adding hostnames is redundant and does not fix the DNS issue.
- ✗
Recreate both containers with --net=host to share the host's network stack
Why it's wrong here
Using --net=host would remove network isolation and is unnecessary; it would not solve the DNS resolution issue within the pod.
- ✓
Use 'podman pod inspect webpod' to verify both containers are part of the pod; if not, remove and recreate the containers using '--pod webpod' correctly
Why this is correct
The most likely cause is that the containers were not properly added to the same pod; inspecting the pod will confirm their membership, and recreating them with the correct flag will enable automatic DNS resolution.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add entries to the /etc/hosts file of the webserver container using --add-host database:$(podman inspect --format '{{.NetworkSettings.IPAddress}}' database)
Why it's wrong here
While this workaround might allow connectivity, it is not the correct solution because the root cause (containers not in the same pod) is not addressed; also the IP might change on restart.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Red Hat often tests the misconception that container-to-container communication requires manual IP or host configuration, when in fact Podman pods provide automatic DNS resolution for container names within the same pod.
Detailed technical explanation
How to think about this question
Podman pods use a shared network namespace (by default) with an embedded DNS resolver (part of netavark/aardvark-dns) that resolves container names to their IP addresses within the pod. This mimics Kubernetes pod behavior where containers can reach each other by name. The 'podman pod create' command creates the network namespace, and 'podman run --pod' attaches containers to that namespace; if the --pod flag is omitted, the container gets its own network namespace and cannot resolve other container names.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this EX200 question test?
Manage containers — This question tests Manage containers — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use 'podman pod inspect webpod' to verify both containers are part of the pod; if not, remove and recreate the containers using '--pod webpod' correctly — Option C is correct because Podman pods create a shared network namespace by default, enabling DNS-based container discovery. The ping failure indicates the containers are not sharing the same pod network namespace, likely due to a misconfiguration such as using 'podman run' without the '--pod' flag or a typo. Verifying with 'podman pod inspect webpod' and recreating the containers with '--pod webpod' ensures they are in the same pod, allowing DNS resolution of container names as hostnames.
What should I do if I get this EX200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This EX200 practice question is part of Courseiva's free Red Hat certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the EX200 exam.
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