200-901 Application Deployment and Security Practice Question
In a docker-compose.yaml file, which key is used to define the container image to be built from a Dockerfile in the current directory?
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
✓
build
The 'build' key specifies the path to the Dockerfile context; 'image' specifies a pre-built image from a registry.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
dockerfile
Why it's wrong here
'dockerfile' is a sub-option of 'build', not a top-level key.
- ✗
image
Why it's wrong here
'image' refers to an existing image, not a build context.
- ✗
context
Why it's wrong here
'context' is a sub-option of 'build', not a top-level key.
- ✓
build
Why this is correct
'build' specifies the build context for creating an image.
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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.