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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 4

Question 30

A project lead describes the following situation: A repository agent needs a separate security analysis by a specialized reviewer. What should the developer do first?

  1. Keep branch protection checks and human review requirements enforced.
  2. Delegate the search to a supported subagent without unnecessary write tools.
  3. Configure automatic Copilot code review per supported repository policy.
  4. Invoke a supported security-review subagent with read-only scope.

Explanation

Correct Answer

D:

A separate focused agent can analyze security risk without modifying the primary worktree. Acceptance evidence: The report identifies concrete threat paths and no files were changed.

Incorrect Answers

A:

AI review is assistance and does not automatically replace required approval policy. That recommendation is relevant to a different task: A team wants to keep PR automation from overriding mandatory human approvals. In this case the main need is: A repository agent needs a separate security analysis by a specialized reviewer.

B:

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 repository agent needs a separate security analysis by a specialized reviewer.

C:

Review automation can run on PR changes without ad hoc manual requests. That recommendation is relevant to a different task: An organization wants automatic Copilot reviews on new PRs in an eligible repository. In this case the main need is: A repository agent needs a separate security analysis by a specialized reviewer.

Question 31

An enterprise wants to know who can configure repository-specific exclusions. Select the most appropriate next action for the team.

  1. Apply supported repository exclusions and access controls for both projects.
  2. Add the supported content exclusion through authorized repository settings.
  3. Configure supported content-exclusion patterns at the proper repository or organizational scope.
  4. Use appropriately authorized repository administrators rather than ordinary contributors.

Explanation

Correct Answer

D:

Exclusion management is permission controlled. Acceptance evidence: An authorized admin saves the rule and an ordinary contributor cannot alter it.

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: An enterprise wants to know who can configure repository-specific exclusions.

B:

Excluded content should not be analyzed by supported code review surfaces. That recommendation is relevant to a different task: A repository administrator needs to exclude a sensitive fixture from Copilot code review. In this case the main need is: An enterprise wants to know who can configure repository-specific exclusions.

C:

Documented exclusions can limit use of selected file content in supported surfaces. That recommendation is relevant to a different task: An organization wants Copilot to ignore a folder containing confidential deployment configuration. In this case the main need is: An enterprise wants to know who can configure repository-specific exclusions.

Question 32

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A user asks for unit tests but gives only the generated method, not the requirements.

  1. The proposal addresses cross-layer authentication and failure paths.
  2. The next diagnosis maps to the first true failure.
  3. Deliberately broken implementations fail the resulting assertions.
  4. The final implementation still honors all listed invariants.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: Deliberately broken implementations fail the resulting assertions. The requested action was: Supply independent behavior examples and expected exceptions.

Incorrect Answers

A:

“The proposal addresses cross-layer authentication and failure paths.” does not demonstrate the result required here: Deliberately broken implementations fail the resulting assertions.

B:

“The next diagnosis maps to the first true failure.” does not demonstrate the result required here: Deliberately broken implementations fail the resulting assertions.

D:

“The final implementation still honors all listed invariants.” does not demonstrate the result required here: Deliberately broken implementations fail the resulting assertions.

Question 33

Copilot suggests a dependency upgrade to fix a vulnerability. Which recommendation best addresses the stated constraint?

  1. Inspect the actual code path and reproduce the issue before making a high-risk change.
  2. Run concurrency stress tests and inspect shared-state access.
  3. Inspect release notes, compatibility, and pinned dependency scan results.
  4. Test authorization and response field filtering with low-privilege accounts.

Explanation

Correct Answer

C:

Upgrades can introduce breaking API or transitive dependencies. Acceptance evidence: The dependency scan clears the finding and integration tests remain green.

Incorrect Answers

A:

AI review alerts may be false positives. That recommendation is relevant to a different task: A code review bot finds a suspicious pattern but offers no line-specific evidence. In this case the main need is: Copilot suggests a dependency upgrade to fix a vulnerability.

B:

Concurrency correctness needs testing beyond sequential unit tests. That recommendation is relevant to a different task: Copilot writes a thread-safe cache claim without synchronization evidence. In this case the main need is: Copilot suggests a dependency upgrade to fix a vulnerability.

D:

Access control must be verified against real principals. That recommendation is relevant to a different task: An assistant writes a REST endpoint that returns all database fields to a normal user. In this case the main need is: Copilot suggests a dependency upgrade to fix a vulnerability.

Question 34

A chat session discussed one module, but a follow-up asks about a different module with the same class name. Which acceptance evidence should the team verify?

  1. The answer targets the specified new module and tests.
  2. The migration passes staging tests and rollback verification.
  3. The next answer uses explicitly reintroduced data.
  4. The final prompt contains one consistent API contract.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The answer targets the specified new module and tests. The requested action was: Reset or explicitly disambiguate file paths and namespaces.

Incorrect Answers

B:

“The migration passes staging tests and rollback verification.” does not demonstrate the result required here: The answer targets the specified new module and tests.

C:

“The next answer uses explicitly reintroduced data.” does not demonstrate the result required here: The answer targets the specified new module and tests.

D:

“The final prompt contains one consistent API contract.” does not demonstrate the result required here: The answer targets the specified new module and tests.

Question 35

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A developer needs an agent to change multiple files and run tests under supervision.

  1. The agent produces a scoped diff and test output for review.
  2. The reviewed file diff matches staged paths and commit intent.
  3. The agent completes the specific lookup but cannot modify unrelated systems.
  4. A test PR receives a Copilot review while human approval gates stay intact.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The agent produces a scoped diff and test output for review. The requested action was: Choose Copilot agent mode with reviewed tool permissions and changes.

Incorrect Answers

B:

“The reviewed file diff matches staged paths and commit intent.” does not demonstrate the result required here: The agent produces a scoped diff and test output for review.

C:

“The agent completes the specific lookup but cannot modify unrelated systems.” does not demonstrate the result required here: The agent produces a scoped diff and test output for review.

D:

“A test PR receives a Copilot review while human approval gates stay intact.” does not demonstrate the result required here: The agent produces a scoped diff and test output for review.

Question 36

A terminal session asks whether the current repository may be trusted by the assistant. Following the chosen solution, what evidence best proves that it worked?

  1. The session invokes the documented copilot binary rather than an unsupported legacy alias.
  2. The executable starts in a normal terminal session.
  3. The displayed usage informs whether to start a focused session.
  4. The session is restricted to the intended repository and task.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: The session is restricted to the intended repository and task. The requested action was: Inspect the working directory before approving trust.

Incorrect Answers

A:

“The session invokes the documented copilot binary rather than an unsupported legacy alias.” does not demonstrate the result required here: The session is restricted to the intended repository and task.

B:

“The executable starts in a normal terminal session.” does not demonstrate the result required here: The session is restricted to the intended repository and task.

C:

“The displayed usage informs whether to start a focused session.” does not demonstrate the result required here: The session is restricted to the intended repository and task.

Question 37

A team completed the change for this case: A model output includes a syntactically valid but invented dependency API. What observation best demonstrates the intended outcome?

  1. Review documentation identifies GitHub public-index scope and possible omissions.
  2. A build against installed package versions exposes the unsupported method.
  3. The agent summarizes the issue but does not follow the injected command.
  4. Correlation works without storing secrets or entire protected prompts.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: A build against installed package versions exposes the unsupported method. The requested action was: Explain that statistical generation does not execute or verify API calls.

Incorrect Answers

A:

“Review documentation identifies GitHub public-index scope and possible omissions.” does not demonstrate the result required here: A build against installed package versions exposes the unsupported method.

C:

“The agent summarizes the issue but does not follow the injected command.” does not demonstrate the result required here: A build against installed package versions exposes the unsupported method.

D:

“Correlation works without storing secrets or entire protected prompts.” does not demonstrate the result required here: A build against installed package versions exposes the unsupported method.

Question 38

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A developer asks Copilot to improve code using production incident records containing addresses.

  1. A supported inline suggestion no longer uses text from the excluded folder.
  2. The public Space contains only approved nonsensitive sources.
  3. The submitted context includes only the fields necessary for debugging.
  4. Eligible clients receive the intended rules across covered repositories.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The submitted context includes only the fields necessary for debugging. The requested action was: Redact identifying data and supply synthetic equivalent examples.

Incorrect Answers

A:

“A supported inline suggestion no longer uses text from the excluded folder.” does not demonstrate the result required here: The submitted context includes only the fields necessary for debugging.

B:

“The public Space contains only approved nonsensitive sources.” does not demonstrate the result required here: The submitted context includes only the fields necessary for debugging.

D:

“Eligible clients receive the intended rules across covered repositories.” does not demonstrate the result required here: The submitted context includes only the fields necessary for debugging.

Question 39

For this Copilot practice scenario, which verification result is most relevant? A user asks Copilot for a regular expression without examples of allowed strings.

  1. The model reasons from a minimal safe log sample.
  2. Invocations consistently apply the required checks to different files.
  3. Valid examples match and invalid prefixes are rejected.
  4. The answer identifies which requirement favors each option.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: Valid examples match and invalid prefixes are rejected. The requested action was: Supply permitted and rejected examples plus anchoring requirements.

Incorrect Answers

A:

“The model reasons from a minimal safe log sample.” does not demonstrate the result required here: Valid examples match and invalid prefixes are rejected.

B:

“Invocations consistently apply the required checks to different files.” does not demonstrate the result required here: Valid examples match and invalid prefixes are rejected.

D:

“The answer identifies which requirement favors each option.” does not demonstrate the result required here: Valid examples match and invalid prefixes are rejected.

Question 40

A project lead describes the following situation: A pull request changes a JWT authorization middleware. What should the developer do first?

  1. Add parallel worker tests and race detection.
  2. Generate tests for authorization boundaries and token claim validation.
  3. Generate security regression tests for issuer, audience, and expiry checks.
  4. Replace concatenation with parameters and add injection tests.

Explanation

Correct Answer

B:

Authentication tests need positive and negative principal fixtures. Acceptance evidence: A token missing the required claim is denied.

Incorrect Answers

A:

Concurrency defects rarely appear in sequential examples. That recommendation is relevant to a different task: A concurrency-safe counter implementation was drafted by an assistant. In this case the main need is: A pull request changes a JWT authorization middleware.

C:

Test generation can expose negative authorization paths. That recommendation is relevant to a different task: An endpoint must reject invalid authorization tokens while still allowing valid ones. In this case the main need is: A pull request changes a JWT authorization middleware.

D:

Parameterized statements prevent interpreting input as executable SQL syntax. That recommendation is relevant to a different task: A generated login form concatenates user input into a SQL string. In this case the main need is: A pull request changes a JWT authorization middleware.