200-901 Application Deployment and Security Practice Question
In a Docker Compose file, which key is used to define the dependency order between services?
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
✓
depends_on
The depends_on key in Docker Compose allows specifying that one service depends on another, controlling startup order.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
links
Why it's wrong here
Incorrect. links is legacy and does not control startup order.
- ✗
volumes
Why it's wrong here
Incorrect. volumes define data persistence, not order.
- ✗
networks
Why it's wrong here
Incorrect. networks defines network connections, not order.
- ✓
depends_on
Why this is correct
Correct. depends_on defines service dependencies.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 200-901 question from scratch — 989 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.