GH-200 Exam Dumps - Microsoft GitHub Administrator Questions and Answers

For JavaScript custom actions, the metadata file supports lifecycle scripts through the runs section. The correct key for a script that runs before the main action entrypoint is pre, and the correct conditional key for controlling whether that pre-script runs is pre-if. Therefore, option B is the only valid metadata structure. GitHub Actions does not use start, start-if, before, or before-if as action metadata keys. Option C is also invalid because pre-if only defines a condition; it cannot contain both a condition and a script reference in one line. In GitHub Actions exam terms, this tests custom action metadata, JavaScript action lifecycle hooks, and conditional execution before the main action logic.

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Self-hosted runners can have default labels and custom labels. These labels are used in the runs-on field to route workflow jobs to runners that match the required criteria. When multiple labels are specified, the runner must match all listed labels before GitHub Actions can assign the job to that runner. Therefore, option A is correct. Option B is false because labels are especially important for self-hosted runners. Option C is incorrect because GitHub does not require the runner IP address as a routing label. Option D is also incorrect because workflows target runners by labels or runner groups, not by hostname. This topic validates runner selection, self-hosted runner configuration, and workflow job routing.

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A reusable workflow stored in another repository must be referenced using the repository owner, repository name, required .github/workflows/ directory, workflow filename, and a ref. GitHub documents the syntax as {owner}/{repo}/.github/workflows/{filename}@{ref}. Option B exactly follows this structure: octo-org identifies the owner, another-repo identifies the repository, the workflow resides under .github/workflows, and v1 supplies the branch, tag, or other valid ref. Options A and C omit the required .github/workflows path. Option D includes that directory but omits the repository owner, so it is not a valid cross-repository reference. Reusable workflows are invoked with jobs. < job_id > .uses, rather than through an ordinary step-level action reference. Therefore, option B is the only correctly formed external reusable workflow reference.

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GITHUB_WORKSPACE is a default environment variable in GitHub Actions that points to the directory on the runner where your repository is checked out. This variable allows you to access files within your repository during the workflow.

In a Docker container action, the action.yml file includes the runs.using field, which is set to docker to specify that the action runs inside a Docker container. This is the key indicator that the action is a Docker container action.

GitHub Enterprise Cloud can share actions and reusable workflows stored in an internal repository with workflows in other internal or private repositories. Access can be configured for repositories within the same organization or, where enterprise access is selected, repositories in organizations owned by the enterprise. Public repositories are deliberately excluded from this internal-action sharing model. GitHub explicitly states that actions and reusable workflows stored in internal repositories cannot be used by public repositories. The repository containing the action must also have its Actions Access setting configured appropriately; internal visibility alone does not automatically override that access control. Therefore, internal repositories and private repositories within the permitted organization or enterprise are the valid consumers, while both public-repository choices are incorrect.

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A JavaScript action is identified in its action metadata file by the runs.using runtime value. In older exam-style content, this is commonly shown as node16; in current GitHub documentation, supported JavaScript runtimes have moved forward, but the principle remains the same: JavaScript actions declare a Node.js runtime under runs.using and specify the main JavaScript file under runs.main. Option A is not reliable because a repository can contain package.json without being a JavaScript action. Option B is unrelated because workflow files do not define the action type. Option C is naming-based and has no technical meaning. GitHub metadata syntax defines runs.using as the runtime for JavaScript actions.

Since the self-hosted runner is configured on a Linux VM and the script is written in PowerShell, you can invoke the script using the pwsh (PowerShell Core) shell in a run step in the workflow. This ensures that the script runs as-is on the Linux runner, as PowerShell Core (pwsh) is cross-platform and supports Linux.

For a composite action, commands are defined inside the runs.steps section of the action metadata file. When a specific command must execute from a particular folder, the correct key is working-directory, and it must be applied at the individual run step level. Option D is correct because it keeps using: " composite " at the runs level and applies working-directory: ${{ inputs.dir }} directly to the step that runs the script. Option A is incorrect because directory is not a valid GitHub Actions run-step key. Option B incorrectly places directory at the runs level. Option C uses the right keyword but places it at the wrong level. This tests composite action metadata syntax and correct step-level execution configuration.

The run keyword is used to execute command-line programs and scripts on a GitHub Actions runner. When several commands must execute within the same workflow step, YAML ' s literal block indicator (|) can be placed after run: and the commands written on separate indented lines. GitHub ' s workflow syntax explicitly demonstrates this pattern with npm ci followed by npm run build. The shell keyword does not contain commands; it specifies which shell should interpret the commands supplied through run. Therefore, options B and C misuse the shell property. Option D also lacks the YAML literal block notation required to represent the multiple command lines as the value of run. Option A correctly executes both commands sequentially within the same shell process and is the documented syntax.

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