A developer has built a Backstage image and wants to run it locally to test the backend. The backend listens on port 7007. The developer wants to access the backend from their host machine. Which docker run command should be used?

docker run --expose 7007 backstage:latest

docker run --network host backstage:latest

docker run -p 7007:7007 backstage:latest

A Backstage project uses a custom plugin that requires a specific version of Node.js. The team wants to ensure the Docker build uses the correct Node version for both the build and runtime stages. What is the best way to specify the Node version in the Dockerfile?

Use different Node.js versions in the build and runtime stages to match each stage's needs.

Install Node.js manually in the runtime stage using apt-get.

Use a base image with the latest Node.js tag in both stages.

Use a specific Node.js version tag, such as node:20-alpine, in both the build and runtime stages.

How can you override a configuration value in Backstage's app-config.yaml when running the container, without modifying the image?

By using the `docker exec` command to change the file inside the running container.

By mounting a different app-config.yaml file over the original using a Docker volume.

By editing the Dockerfile to change the value and rebuilding the image.

By setting an environment variable, such as APP_CONFIG_backend_baseUrl, when running the container.

Certified Backstage Associate (CBA)

Domain 1Objective 5

Use Docker to Build a Container Image of a Backstage Project CBA Practice Questions (Page 1)

Part of the Backstage Development Workflow domain, which accounts for 24% of the CBA exam. Linux Foundation does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–14 in this domain), expect 2–3 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

7concepts

24%of the exam

Questions 1–5

1foundation · easy
Which command lists the images stored locally, allowing you to verify that your Backstage image was created?
Select an answer first
2application · easy
A developer has built a Backstage image and wants to run it locally to test the backend. The backend listens on port 7007. The developer wants to access the backend from their host machine. Which docker run command should be used?
Select an answer first
3foundation · easy
Which file in a Backstage project is essential for Docker to install the exact same JavaScript dependencies during the image build?
Select an answer first
4application · medium
A Backstage project uses a custom plugin that requires a specific version of Node.js. The team wants to ensure the Docker build uses the correct Node version for both the build and runtime stages. What is the best way to specify the Node version in the Dockerfile?
Select an answer first
5foundation · easy
How can you override a configuration value in Backstage's app-config.yaml when running the container, without modifying the image?
Select an answer first

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Use Docker to Build a Container Image of a Backstage Project CBA Practice Questions (Page 1)

Questions 1–5

Which command lists the images stored locally, allowing you to verify that your Backstage image was created?

A developer has built a Backstage image and wants to run it locally to test the backend. The backend listens on port 7007. The developer wants to access the backend from their host machine. Which docker run command should be used?

Which file in a Backstage project is essential for Docker to install the exact same JavaScript dependencies during the image build?

A Backstage project uses a custom plugin that requires a specific version of Node.js. The team wants to ensure the Docker build uses the correct Node version for both the build and runtime stages. What is the best way to specify the Node version in the Dockerfile?

How can you override a configuration value in Backstage's app-config.yaml when running the container, without modifying the image?

Keep studying — Backstage Development Workflow