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Exam Code: GH-300

Exam Name GitHub Copilot

Certification Provider: Microsoft

Corresponding Certification: GitHub Copilot

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GitHub Copilot (GH-300) Practice Tests

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Microsoft GH-300 Practice Test 41

Question 400

An assistant generates a package name that does not exist in the approved dependency registry. Which acceptance evidence should the team verify?

  1. The chosen installer has an official provenance and verified signature.
  2. The dry run lists only intended temporary files and the command is properly scoped.
  3. The manifest contains only verified allowed packages and the clean build resolves them.
  4. The issue and prompt context contain redacted synthetic data, not real customer records.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The manifest contains only verified allowed packages and the clean build resolves them. The requested action was: Check the package in the official registry and lockfile before adding it.

Incorrect Answers

A:

“The chosen installer has an official provenance and verified signature.” does not demonstrate the result required here: The manifest contains only verified allowed packages and the clean build resolves them.

B:

“The dry run lists only intended temporary files and the command is properly scoped.” does not demonstrate the result required here: The manifest contains only verified allowed packages and the clean build resolves them.

D:

“The issue and prompt context contain redacted synthetic data, not real customer records.” does not demonstrate the result required here: The manifest contains only verified allowed packages and the clean build resolves them.

Question 401

For this Copilot practice scenario, which verification result is most relevant? An engineer thinks an individual editor preference can override an enforced enterprise security restriction.

  1. A user lacking repository access cannot use its file context.
  2. An unauthorized collaborator cannot view restricted sources.
  3. Eligible clients receive the intended rules across covered repositories.
  4. The user cannot enable the prohibited option locally.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: The user cannot enable the prohibited option locally. The requested action was: Check the effective higher-level Copilot policy and request authorized change.

Incorrect Answers

A:

“A user lacking repository access cannot use its file context.” does not demonstrate the result required here: The user cannot enable the prohibited option locally.

B:

“An unauthorized collaborator cannot view restricted sources.” does not demonstrate the result required here: The user cannot enable the prohibited option locally.

C:

“Eligible clients receive the intended rules across covered repositories.” does not demonstrate the result required here: The user cannot enable the prohibited option locally.

Question 402

An application must support keyboard-only navigation after a generated UI rewrite. Select the most appropriate next action for the team.

  1. Remove and rotate the secret and run secret-scanning checks.
  2. Generate idempotency tests using duplicate event IDs.
  3. Generate tests for authorization boundaries and token claim validation.
  4. Add automated accessibility checks and manual keyboard traversal.

Explanation

Correct Answer

D:

Automated code generation can break focus order and semantic labels. Acceptance evidence: Every control is reachable and usable without a mouse.

Incorrect Answers

A:

Credentials in commits can remain accessible in history. That recommendation is relevant to a different task: A pull request adds an AWS access token into a configuration example. In this case the main need is: An application must support keyboard-only navigation after a generated UI rewrite.

B:

At-least-once delivery must not duplicate business effects. That recommendation is relevant to a different task: A billing endpoint may process the same webhook multiple times after retry. In this case the main need is: An application must support keyboard-only navigation after a generated UI rewrite.

C:

Authentication tests need positive and negative principal fixtures. That recommendation is relevant to a different task: A pull request changes a JWT authorization middleware. In this case the main need is: An application must support keyboard-only navigation after a generated UI rewrite.

Question 403

For this Copilot practice scenario, which verification result is most relevant? A developer thinks putting a file in .gitignore automatically excludes it from every Copilot prompt.

  1. The MCP credentials themselves cannot read the protected path.
  2. The effective policy lists the sensitive path explicitly.
  3. The sensitive source is inaccessible to the assistant despite client limitations.
  4. A test workflow cannot access the secret even when the symlink exists.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The effective policy lists the sensitive path explicitly. The requested action was: Configure dedicated Copilot content exclusion rather than assume .gitignore is sufficient.

Incorrect Answers

A:

“The MCP credentials themselves cannot read the protected path.” does not demonstrate the result required here: The effective policy lists the sensitive path explicitly.

C:

“The sensitive source is inaccessible to the assistant despite client limitations.” does not demonstrate the result required here: The effective policy lists the sensitive path explicitly.

D:

“A test workflow cannot access the secret even when the symlink exists.” does not demonstrate the result required here: The effective policy lists the sensitive path explicitly.

Question 404

A team completed the change for this case: A function that calculates discounts lacks branch-level unit tests. What observation best demonstrates the intended outcome?

  1. Discount tests cover the zero, threshold, and upper-bound cases.
  2. Invalid tokens fail and a correctly scoped token succeeds.
  3. An injection fixture is treated as data and cannot change query structure.
  4. Stress tests produce correct totals without data-race findings.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: Discount tests cover the zero, threshold, and upper-bound cases. The requested action was: Ask Copilot to draft tests for each rate boundary and then validate expected totals.

Incorrect Answers

B:

“Invalid tokens fail and a correctly scoped token succeeds.” does not demonstrate the result required here: Discount tests cover the zero, threshold, and upper-bound cases.

C:

“An injection fixture is treated as data and cannot change query structure.” does not demonstrate the result required here: Discount tests cover the zero, threshold, and upper-bound cases.

D:

“Stress tests produce correct totals without data-race findings.” does not demonstrate the result required here: Discount tests cover the zero, threshold, and upper-bound cases.

Question 405

A billing endpoint may process the same webhook multiple times after retry. Which acceptance evidence should the team verify?

  1. Replaying one event creates exactly one charge.
  2. An injected script payload is displayed safely and never runs.
  3. Invalid rows are flagged and legitimate rows retain correct types.
  4. Discount tests cover the zero, threshold, and upper-bound cases.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: Replaying one event creates exactly one charge. The requested action was: Generate idempotency tests using duplicate event IDs.

Incorrect Answers

B:

“An injected script payload is displayed safely and never runs.” does not demonstrate the result required here: Replaying one event creates exactly one charge.

C:

“Invalid rows are flagged and legitimate rows retain correct types.” does not demonstrate the result required here: Replaying one event creates exactly one charge.

D:

“Discount tests cover the zero, threshold, and upper-bound cases.” does not demonstrate the result required here: Replaying one event creates exactly one charge.

Question 406

Copilot suggests a dependency upgrade to fix a vulnerability. Following the chosen solution, what evidence best proves that it worked?

  1. A focused test reproduces the defect or documents a disproven finding.
  2. The final diff touches only necessary files and the regression passes.
  3. The dependency scan clears the finding and integration tests remain green.
  4. The bug is reproduced without changing shared production data.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The dependency scan clears the finding and integration tests remain green. The requested action was: Inspect release notes, compatibility, and pinned dependency scan results.

Incorrect Answers

A:

“A focused test reproduces the defect or documents a disproven finding.” does not demonstrate the result required here: The dependency scan clears the finding and integration tests remain green.

B:

“The final diff touches only necessary files and the regression passes.” does not demonstrate the result required here: The dependency scan clears the finding and integration tests remain green.

D:

“The bug is reproduced without changing shared production data.” does not demonstrate the result required here: The dependency scan clears the finding and integration tests remain green.

Question 407

Two similar functions differ in validation behavior and Copilot picks the wrong one as context. Which recommendation best addresses the stated constraint?

  1. Include the exact selection and relevant surrounding code in chat context.
  2. Reference the exact target file and method in the prompt.
  3. Reject the proposal and provide current project API references.
  4. Reject that action and narrow the authorized working set.

Explanation

Correct Answer

B:

Precise context reduces mis-targeted code edits. Acceptance evidence: The patch changes the intended method and tests cover both implementations.

Incorrect Answers

A:

Focused selection helps avoid unrelated guesses. That recommendation is relevant to a different task: A workspace requires the assistant to consider the currently selected failing assertion. In this case the main need is: Two similar functions differ in validation behavior and Copilot picks the wrong one as context.

C:

Inline predictions may follow outdated or irrelevant patterns. That recommendation is relevant to a different task: A generated autocomplete suggestion contains a deprecated API method. In this case the main need is: Two similar functions differ in validation behavior and Copilot picks the wrong one as context.

D:

Agent permission control applies even if the task is otherwise legitimate. That recommendation is relevant to a different task: An agent tool call is asking to modify a secrets file outside the requested work area. In this case the main need is: Two similar functions differ in validation behavior and Copilot picks the wrong one as context.

Question 408

For this GitHub Copilot case, which implementation decision is best supported? A developer asks Copilot to improve code using production incident records containing addresses.

  1. Apply supported repository exclusions and access controls for both projects.
  2. Redact identifying data and supply synthetic equivalent examples.
  3. Disable unauthorized tools and provide least-privilege connectors.
  4. Decline it and review code reference and provenance before use.

Explanation

Correct Answer

B:

Prompt minimization is needed even when the repository itself is private. Acceptance evidence: The submitted context includes only the fields necessary for debugging.

Incorrect Answers

A:

Permission scoping and context isolation limit accidental cross-project use. That recommendation is relevant to a different task: A project wants to prevent code from one private repository being reused as context for another project. In this case the main need is: A developer asks Copilot to improve code using production incident records containing addresses.

C:

Tool permissions are a separate control from prompt wording. That recommendation is relevant to a different task: A platform team wants to isolate private data from unapproved Copilot integrations. In this case the main need is: A developer asks Copilot to improve code using production incident records containing addresses.

D:

Permissions to receive a suggestion do not settle ownership or suitability. That recommendation is relevant to a different task: A developer sees a suggestion that may contain a proprietary algorithm unrelated to their own task. In this case the main need is: A developer asks Copilot to improve code using production incident records containing addresses.

Question 409

A team completed the change for this case: A workflow needs one question answered directly from a script without an interactive session. What observation best demonstrates the intended outcome?

  1. File references and tool results stay within the intended project.
  2. The process returns a response and exits with the expected status.
  3. The selected invocation matches current help and exits cleanly.
  4. The displayed usage informs whether to start a focused session.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The process returns a response and exits with the expected status. The requested action was: Invoke the current CLI with a documented -p prompt.

Incorrect Answers

A:

“File references and tool results stay within the intended project.” does not demonstrate the result required here: The process returns a response and exits with the expected status.

C:

“The selected invocation matches current help and exits cleanly.” does not demonstrate the result required here: The process returns a response and exits with the expected status.

D:

“The displayed usage informs whether to start a focused session.” does not demonstrate the result required here: The process returns a response and exits with the expected status.

Question 410

A model produces a plausible answer but does not state assumptions about concurrency. Which acceptance evidence should the team verify?

  1. The plan identifies thread-safety and cancellation requirements.
  2. Each subtask passes its focused tests before moving on.
  3. The comparison reports valid outputs under a fixed schema.
  4. The answer labels uncertainty and requests only missing proof.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The plan identifies thread-safety and cancellation requirements. The requested action was: Ask it to list assumptions and failure modes before implementing.

Incorrect Answers

B:

“Each subtask passes its focused tests before moving on.” does not demonstrate the result required here: The plan identifies thread-safety and cancellation requirements.

C:

“The comparison reports valid outputs under a fixed schema.” does not demonstrate the result required here: The plan identifies thread-safety and cancellation requirements.

D:

“The answer labels uncertainty and requests only missing proof.” does not demonstrate the result required here: The plan identifies thread-safety and cancellation requirements.