A JavaScript action fails with 'TypeError: core.getInput is not a function'. The action.yml is correct and the action is invoked. What is the most likely cause?

The action.yml specifies 'runs.using: node16' but the code uses Node 20 features.

The action imports core incorrectly, e.g., 'import core from "@actions/core"' instead of 'import * as core from "@actions/core"'.

The @actions/core package is not installed.

The action uses an outdated version of Node.js.

A developer is creating a JavaScript action that reads a user-provided input and writes a message to the workflow log. The action uses the @actions/core package. The developer has created action.yml and index.js, but when the action runs, it fails with 'Cannot find module @actions/core'. The package.json file exists. What is the most likely cause?

The index.js file is not the entry point specified in the 'main' field of action.yml.

The package.json file is missing the 'dependencies' field.

The node_modules directory is not committed to the repository.

The action.yml file does not specify a 'runs.using' value of 'node20'.

A JavaScript action fails with a "Cannot find module '@actions/core'" error. What is the most likely cause?

The action's inputs are not defined in action.yml.

The action is using the wrong runtime version.

The action's dependencies are not installed before the action runs.

The action.yml file is missing the `runs` section.

Why does immutability of actions affect version pinning?

Because actions cannot be pinned to a commit SHA.

Because immutability means you must always use the latest version.

Because version tags are automatically moved to the latest commit.

Because pinning to a specific tag ensures your workflow uses the exact code that was released, avoiding unexpected changes.

GitHubActions Certification

Domain 3Objective 1

Create and Troubleshoot Custom Actions GH-200 Practice Questions (Page 4)

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 16–20

16application · medium
A JavaScript action fails with 'TypeError: core.getInput is not a function'. The action.yml is correct and the action is invoked. What is the most likely cause?
Select an answer first
17application · medium
A developer is creating a JavaScript action that reads a user-provided input and writes a message to the workflow log. The action uses the @actions/core package. The developer has created action.yml and index.js, but when the action runs, it fails with 'Cannot find module @actions/core'. The package.json file exists. What is the most likely cause?
Select an answer first
18foundation · easy
A JavaScript action fails with a "Cannot find module '@actions/core'" error. What is the most likely cause?
Select an answer first
19foundation · easy
Why does immutability of actions affect version pinning?
Select an answer first
20foundation · easy
Which file is required in a JavaScript action to define the action's metadata, such as its name, inputs, and outputs?
Select an answer first

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Create and Troubleshoot Custom Actions GH-200 Practice Questions (Page 4)

Questions 16–20

A JavaScript action fails with 'TypeError: core.getInput is not a function'. The action.yml is correct and the action is invoked. What is the most likely cause?

A JavaScript action fails with a "Cannot find module '@actions/core'" error. What is the most likely cause?

Why does immutability of actions affect version pinning?

Which file is required in a JavaScript action to define the action's metadata, such as its name, inputs, and outputs?

Keep studying — Author and maintain actions