200-901 Application Deployment and Security Practice Question
A developer needs to share a Docker image built from a Dockerfile with team members. Which command correctly builds the image and tags it as 'myapp:v1'?
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 build --tag myapp:v1 .
Both the `--tag` flag and the `-t` shorthand are valid options for tagging a Docker image during build. `docker build --tag myapp:v1 .` and `docker build -t myapp:v1 .` are equivalent commands that build the image from the current directory and tag it as myapp:v1.
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 build --tag myapp:v1 .
Why this is correct
Correct. The `--tag` flag is the long form and works exactly like `-t`.
- ✓
docker build -t myapp:v1 .
Why this is correct
Correct. The `-t` flag is the shorthand for `--tag` and is also valid.
- ✗
docker build . --name myapp:v1
Why it's wrong here
Incorrect. The `--name` flag is not a valid option for `docker build`. Tagging is done with `--tag` or `-t`.
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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.