A developer creates a Docker container action. The action.yml correctly references a Dockerfile. When the action runs, it fails with 'docker: Error response from daemon: OCI runtime create failed'. The Dockerfile builds successfully locally. What is the most likely cause?

The Dockerfile's ENTRYPOINT is not executable.

The Dockerfile uses a base image that is not available on the runner.

The action.yml does not specify 'runs.using: docker'.

The action.yml is missing the 'image' property.

A Docker action fails with 'Error: Container action is not supported on this runner. Please use a JavaScript action or a composite action.' The action.yml and Dockerfile are correct. The workflow runs on a GitHub-hosted runner. What is the most likely cause?

The runner does not have Docker installed.

The workflow uses a runner label that does not support Docker actions.

The action.yml is missing the 'runs.using: docker' declaration.

The Dockerfile is not in the repository root.

What does it mean that actions are immutable once released?

Actions are automatically updated to the latest version.

A released action's code and metadata cannot be changed; any update requires a new release.

Actions cannot be deleted from the GitHub Marketplace.

Actions can only be used on GitHub-hosted runners.

GitHubActions Certification

Domain 3Objective 1

Create and Troubleshoot Custom Actions GH-200 Practice Questions (Page 1)

Part of the Author and maintain actions domain, which accounts for 15-20% of the GH-200 exam.

25questions here

5free pages

7concepts

15-20%of the exam

Questions 1–5

1application · medium
A developer creates a Docker container action. The action.yml correctly references a Dockerfile. When the action runs, it fails with 'docker: Error response from daemon: OCI runtime create failed'. The Dockerfile builds successfully locally. What is the most likely cause?
Select an answer first
2expert · hard
A Docker action fails with 'Error: Container action is not supported on this runner. Please use a JavaScript action or a composite action.' The action.yml and Dockerfile are correct. The workflow runs on a GitHub-hosted runner. What is the most likely cause?
Select an answer first
3foundation · easy
In a composite action's action.yml, which key is used to list the individual steps that the action will execute?
Select an answer first
4foundation · easy
Which two files are required to create a Docker container action?
Select an answer first
5foundation · easy
What does it mean that actions are immutable once released?
Select an answer first

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Create and Troubleshoot Custom Actions GH-200 Practice Questions (Page 1)

Questions 1–5

A developer creates a Docker container action. The action.yml correctly references a Dockerfile. When the action runs, it fails with 'docker: Error response from daemon: OCI runtime create failed'. The Dockerfile builds successfully locally. What is the most likely cause?

A Docker action fails with 'Error: Container action is not supported on this runner. Please use a JavaScript action or a composite action.' The action.yml and Dockerfile are correct. The workflow runs on a GitHub-hosted runner. What is the most likely cause?

In a composite action's action.yml, which key is used to list the individual steps that the action will execute?

Which two files are required to create a Docker container action?

What does it mean that actions are immutable once released?

Keep studying — Author and maintain actions