200-901 Application Deployment and Security Practice Question
A developer needs to share a Docker image with a colleague. They decide to push the image to a registry. Which Docker command pushes an image to a registry?
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 push my-image:latest
docker push uploads a local image to a registry. docker pull downloads. docker push requires the image to be tagged with the registry URL.
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 export my-image:latest
Why it's wrong here
Export creates a tar archive, not push.
- ✗
docker commit my-image:latest
Why it's wrong here
Commit creates an image from a container.
- ✓
docker push my-image:latest
Why this is correct
Correct command to push.
- ✗
docker pull my-image:latest
Why it's wrong here
Pull downloads from registry.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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