200-901 Application Deployment and Security Practice Question
Which Docker command is used to view the logs of a running container in real-time?
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
✓
docker logs -f <container>
docker logs -f follows the log output, similar to tail -f.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
docker exec -it <container> tail -f /var/log/app.log
Why it's wrong here
This could work but is not the standard Docker command for logs.
- ✓
docker logs -f <container>
Why this is correct
The -f flag follows log output in real-time.
- ✗
docker attach <container>
Why it's wrong here
attach connects to the main process's STDIN/STDOUT, not logs.
- ✗
docker logs <container>
Why it's wrong here
This shows logs but not in real-time; it exits after showing current logs.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.