- A
Use the `--read-only` flag.
Why wrong: The --read-only flag makes the container's filesystem read-only, preventing data writes entirely.
- B
Use the `--tmpfs` flag.
Why wrong: The --tmpfs flag mounts a temporary filesystem in memory, which is lost when the container stops.
- C
Create a named volume with `podman volume create` and mount it.
Named volumes are managed by Podman and persist even after the container is removed, unless explicitly deleted.
- D
Mount a host directory using `-v /host/data:/var/lib/mysql`.
This bind mount stores data in the host directory, which persists independently of the container.
- E
Use the `--rm` flag when running the container.
Why wrong: The --rm flag removes the container and any associated anonymous volumes upon exit, so data is lost.
Two Methods to Ensure Data Persists After Container Removal
This EX200 practice question tests your understanding of manage containers. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A system administrator needs to ensure that data written to a container's `/var/lib/mysql` directory persists after the container is removed. Which TWO methods accomplish this requirement?
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
Create a named volume with `podman volume create` and mount it.
Option C is correct because a named volume created with `podman volume create` is managed by Podman and persists independently of the container lifecycle. When mounted to `/var/lib/mysql`, data written to that directory is stored in the volume and remains available even after the container is removed. This is the recommended method for persistent data in production environments.
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.
- ✗
Use the `--read-only` flag.
Why it's wrong here
The --read-only flag makes the container's filesystem read-only, preventing data writes entirely.
- ✗
Use the `--tmpfs` flag.
Why it's wrong here
The --tmpfs flag mounts a temporary filesystem in memory, which is lost when the container stops.
- ✓
Create a named volume with `podman volume create` and mount it.
Why this is correct
Named volumes are managed by Podman and persist even after the container is removed, unless explicitly deleted.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Mount a host directory using `-v /host/data:/var/lib/mysql`.
Why this is correct
This bind mount stores data in the host directory, which persists independently of the container.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use the `--rm` flag when running the container.
Why it's wrong here
The --rm flag removes the container and any associated anonymous volumes upon exit, so data is lost.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `--tmpfs` with persistent storage, not realizing that tmpfs is volatile and exists only in RAM, or they mistakenly think `--rm` helps with persistence when it actually ensures automatic cleanup of the container's writable layer.
Detailed technical explanation
How to think about this question
Under the hood, Podman volumes are stored on the host filesystem under `/var/lib/containers/storage/volumes/` by default, using overlay or vfs drivers. When a host directory is mounted with `-v /host/data:/var/lib/mysql`, the bind mount directly maps the container path to a host directory, bypassing the container's union filesystem. In real-world scenarios, using named volumes is preferred for portability and backup, while bind mounts are useful for sharing configuration files or logs between host and container.
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: Create a named volume with `podman volume create` and mount it. — Option C is correct because a named volume created with `podman volume create` is managed by Podman and persists independently of the container lifecycle. When mounted to `/var/lib/mysql`, data written to that directory is stored in the volume and remains available even after the container is removed. This is the recommended method for persistent data in production environments.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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