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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 55

Question 540

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? An AI review returns an insecure hard-coded key suggestion.

  1. The review record contains the matched source URL and reported license.
  2. The committed change contains no embedded credential and scans pass.
  3. Explicit attack fixtures and human review supplement AI-generated checks.
  4. The final adopted code has reviewed licensing or a clean independent replacement.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The committed change contains no embedded credential and scans pass. The requested action was: Reject the suggestion and replace it with secret injection and rotation.

Incorrect Answers

A:

“The review record contains the matched source URL and reported license.” does not demonstrate the result required here: The committed change contains no embedded credential and scans pass.

C:

“Explicit attack fixtures and human review supplement AI-generated checks.” does not demonstrate the result required here: The committed change contains no embedded credential and scans pass.

D:

“The final adopted code has reviewed licensing or a clean independent replacement.” does not demonstrate the result required here: The committed change contains no embedded credential and scans pass.

Question 541

For this GitHub Copilot case, which implementation decision is best supported? A task in agent mode requires access to a third-party issue tracker that is not a native tool.

  1. Connect an approved Model Context Protocol server with least-privilege credentials.
  2. Grant membership only to the needed Space and verify access to each referenced source.
  3. Restrict the MCP server credentials and tool allowlist before continuing.
  4. Delegate the search to a supported subagent without unnecessary write tools.

Explanation

Correct Answer

A:

MCP can expose authorized external tools and context to agents. Acceptance evidence: The requested issue is read through the approved server and unrelated resources remain inaccessible.

Incorrect Answers

B:

Space sharing does not override a viewer’s independent permission to each source. That recommendation is relevant to a different task: An existing private Copilot Space must onboard a new teammate who cannot access every referenced repository. In this case the main need is: A task in agent mode requires access to a third-party issue tracker that is not a native tool.

C:

Tool integration can expand agent reach beyond the source repository. That recommendation is relevant to a different task: A Copilot agent tries to use an MCP tool that has broader permissions than the ticket requires. In this case the main need is: A task in agent mode requires access to a third-party issue tracker that is not a native tool.

D:

Subagents can separate exploratory context from the main task. That recommendation is relevant to a different task: A primary agent has a large codebase and a narrow exploratory subtask can be isolated. In this case the main need is: A task in agent mode requires access to a third-party issue tracker that is not a native tool.

Question 542

For this GitHub Copilot case, which implementation decision is best supported? A developer asks Copilot to explain a stack trace with no failing code attached.

  1. Provide a compact table of input, expected result, and corner cases.
  2. Include or reference the approved repository instructions and dependencies.
  3. Ask for constraints, trade-offs, and explicit evaluation criteria.
  4. Include the error, relevant call path and environment in context.

Explanation

Correct Answer

D:

Effective prompts provide the evidence needed to diagnose the specific issue. Acceptance evidence: The analysis identifies a reproducing call site instead of guessing.

Incorrect Answers

A:

Structured examples make coverage expectations concrete. That recommendation is relevant to a different task: A tester wants table-driven tests for a date parser. In this case the main need is: A developer asks Copilot to explain a stack trace with no failing code attached.

B:

Project conventions are not guaranteed from generic language prompts. That recommendation is relevant to a different task: A response must conform to company style and dependency policies. In this case the main need is: A developer asks Copilot to explain a stack trace with no failing code attached.

C:

A comparison prompt should request decision evidence, not only a recommendation. That recommendation is relevant to a different task: A teammate needs a structured design choice between two database options. In this case the main need is: A developer asks Copilot to explain a stack trace with no failing code attached.

Question 543

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A user requests changes to repository policy but their GitHub role lacks administrative rights.

  1. The corrected review no longer incorporates restricted content.
  2. The allowed request succeeds with safety protections intact.
  3. Only the authorized principal can alter the control.
  4. A test account cannot read the protected directory.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: Only the authorized principal can alter the control. The requested action was: Route the change to a repository or organization admin with the required authority.

Incorrect Answers

A:

“The corrected review no longer incorporates restricted content.” does not demonstrate the result required here: Only the authorized principal can alter the control.

B:

“The allowed request succeeds with safety protections intact.” does not demonstrate the result required here: Only the authorized principal can alter the control.

D:

“A test account cannot read the protected directory.” does not demonstrate the result required here: Only the authorized principal can alter the control.

Question 544

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A user needs a large refactor but cannot validate one huge generated patch safely.

  1. The corrected patch passes both old and new tests.
  2. Each subtask passes its focused tests before moving on.
  3. The next diagnosis maps to the first true failure.
  4. The migration passes staging tests and rollback verification.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: Each subtask passes its focused tests before moving on. The requested action was: Break the work into incremental, independently testable subtasks.

Incorrect Answers

A:

“The corrected patch passes both old and new tests.” does not demonstrate the result required here: Each subtask passes its focused tests before moving on.

C:

“The next diagnosis maps to the first true failure.” does not demonstrate the result required here: Each subtask passes its focused tests before moving on.

D:

“The migration passes staging tests and rollback verification.” does not demonstrate the result required here: Each subtask passes its focused tests before moving on.

Question 545

A project lead describes the following situation: An application duplicates validation logic in several endpoints. What should the developer do first?

  1. Request an initial script draft with quoting and failure handling.
  2. Ask Copilot to identify shared logic and propose a reusable validator.
  3. Ask Copilot to draft documentation from the actual signature and tests.
  4. Use Copilot to draft the translation with equivalence fixtures.

Explanation

Correct Answer

B:

Refactoring can centralize repeated checks and reduce drift. Acceptance evidence: All endpoints retain equivalent error behavior after extraction.

Incorrect Answers

A:

Copilot can accelerate routine automation script creation. That recommendation is relevant to a different task: A developer must write a Bash script to package artifacts on Linux. In this case the main need is: An application duplicates validation logic in several endpoints.

C:

Generated docstrings can reduce manual documentation effort. That recommendation is relevant to a different task: A public library method lacks useful usage documentation. In this case the main need is: An application duplicates validation logic in several endpoints.

D:

Language-porting assistance can reduce manual syntax conversion. That recommendation is relevant to a different task: An engineer needs to translate a Java data transformation into Python for a migration. In this case the main need is: An application duplicates validation logic in several endpoints.

Question 546

A developer sees a pale suggestion but wants to keep existing code unchanged. Which acceptance evidence should the team verify?

  1. The buffer remains unchanged after dismissal.
  2. The accepted revision builds against the installed supported API.
  3. After reauthentication, suggestions return in an allowed test repository.
  4. Only explicitly accepted completion text is inserted.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The buffer remains unchanged after dismissal. The requested action was: Dismiss the inline suggestion without accepting it.

Incorrect Answers

B:

“The accepted revision builds against the installed supported API.” does not demonstrate the result required here: The buffer remains unchanged after dismissal.

C:

“After reauthentication, suggestions return in an allowed test repository.” does not demonstrate the result required here: The buffer remains unchanged after dismissal.

D:

“Only explicitly accepted completion text is inserted.” does not demonstrate the result required here: The buffer remains unchanged after dismissal.

Question 547

A project lead describes the following situation: An engineer wants a short implementation plan before granting permission to edit code. What should the developer do first?

  1. Request a plan using a supported planning interaction before agent execution.
  2. Use an eligible Copilot coding-agent workflow with a scoped issue and review gates.
  3. Add reviewed repository custom instructions in the supported instructions file.
  4. Decline that tool command and request a plan that avoids destructive execution.

Explanation

Correct Answer

A:

Planning separates intended steps from authorized modifications. Acceptance evidence: The plan identifies affected files and test steps with no unapproved edits.

Incorrect Answers

B:

Delegated agents operate through reviewable repository changes. That recommendation is relevant to a different task: A user wants to delegate a bounded repository task to a remote coding agent. In this case the main need is: An engineer wants a short implementation plan before granting permission to edit code.

C:

Repository instructions provide coding context across supported Copilot workflows. That recommendation is relevant to a different task: A team wants consistent naming and test conventions during repository-local coding assistance. In this case the main need is: An engineer wants a short implementation plan before granting permission to edit code.

D:

Task delegation does not override command approval or environment safety. That recommendation is relevant to a different task: A developer requests a high-level refactor but the agent wants to run an untrusted migration script. In this case the main need is: An engineer wants a short implementation plan before granting permission to edit code.

Question 548

A team completed the change for this case: An inline suggestion accidentally breaks formatting style in a TypeScript project. What observation best demonstrates the intended outcome?

  1. Public signatures remain identical and compatibility tests pass.
  2. The answer correctly relates to earlier failure evidence without inventing new files.
  3. The formatted change passes the repository lint rules.
  4. After reauthentication, suggestions return in an allowed test repository.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The formatted change passes the repository lint rules. The requested action was: Review the inserted code and run the repository formatter and linter.

Incorrect Answers

A:

“Public signatures remain identical and compatibility tests pass.” does not demonstrate the result required here: The formatted change passes the repository lint rules.

B:

“The answer correctly relates to earlier failure evidence without inventing new files.” does not demonstrate the result required here: The formatted change passes the repository lint rules.

D:

“After reauthentication, suggestions return in an allowed test repository.” does not demonstrate the result required here: The formatted change passes the repository lint rules.

Question 549

A team completed the change for this case: A team needs a prompt that cannot accidentally request production deployment. What observation best demonstrates the intended outcome?

  1. The answer targets the specified new module and tests.
  2. The resulting assertion reflects the documented contract.
  3. No remote deployment or production write occurs.
  4. The next diagnosis maps to the first true failure.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: No remote deployment or production write occurs. The requested action was: Explicitly restrict the task to analysis, patch proposals, and local tests.

Incorrect Answers

A:

“The answer targets the specified new module and tests.” does not demonstrate the result required here: No remote deployment or production write occurs.

B:

“The resulting assertion reflects the documented contract.” does not demonstrate the result required here: No remote deployment or production write occurs.

D:

“The next diagnosis maps to the first true failure.” does not demonstrate the result required here: No remote deployment or production write occurs.

Question 550

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? An agent proposes changing 14 unrelated modules for a one-line defect.

  1. The final diff touches only necessary files and the regression passes.
  2. DNS resolution is restored and requests meet their normal timeout.
  3. A focused test reproduces the defect or documents a disproven finding.
  4. The patched endpoint preserves documented status and body semantics.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The final diff touches only necessary files and the regression passes. The requested action was: Review and minimize its diff before accepting it.

Incorrect Answers

B:

“DNS resolution is restored and requests meet their normal timeout.” does not demonstrate the result required here: The final diff touches only necessary files and the regression passes.

C:

“A focused test reproduces the defect or documents a disproven finding.” does not demonstrate the result required here: The final diff touches only necessary files and the regression passes.

D:

“The patched endpoint preserves documented status and body semantics.” does not demonstrate the result required here: The final diff touches only necessary files and the regression passes.