hardMultiple ChoiceObjective-mapped
XK0-006 Practice Question: A containerized application writes logs to…
A containerized application writes logs to /var/log/app.log. The administrator wants to ensure logs persist even if the container is removed. Which approach should be used?
⚠ Common exam trap
It's easy for candidates to confuse bind mounts with Docker volumes, thinking that any host-path mapping provides automatic persistence, or they may assume that docker logs retains logs after container removal, when in fact it only works for running or stopped containers, not removed ones.
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 a Docker volume mounted at /var/log
Docker volumes are managed by Docker and persist independently of the container lifecycle. By mounting a volume at /var/log, the application writes logs directly to the volume, ensuring the data survives container removal and can be reused by other containers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Copy logs to a bind mount
Why it's wrong here
A bind mount maps a host directory into the container; if not mounted, logs are lost. This is not automatic.
- ✗
Set the log driver to syslog
Why it's wrong here
Changes the logging driver to send logs to syslog, but still container-local unless syslog is external.
- ✗
Redirect logs to stdout and use docker logs
Why it's wrong here
This captures logs only while the container exists; logs are lost when the container is removed.
- ✓
Use a Docker volume mounted at /var/log
Why this is correct
A Docker volume is managed by Docker and persists across container removal, retaining logs.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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