200-901 Application Deployment and Security Practice Question
A developer is using Docker Compose to run a multi-service application. Which THREE keys are valid top-level keys in a docker-compose.yml file? (Choose three.)
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
✓
volumes
Services, networks, and volumes are top-level keys in Docker Compose. Ports is a key within a service definition, not top-level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
volumes
Why this is correct
Correct. volumes is a top-level key for defining named volumes.
- ✗
environment
Why it's wrong here
Incorrect. environment is a key under a service.
- ✗
ports
Why it's wrong here
Incorrect. ports is a key under a service, not top-level.
- ✓
services
Why this is correct
Correct. services is a top-level key defining the services.
- ✓
networks
Why this is correct
Correct. networks is a top-level key for defining networks.
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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.