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Exam Code: GH-300

Exam Name GitHub Copilot

Certification Provider: Microsoft

Corresponding Certification: GitHub Copilot

Microsoft GH-300 Bundle $25.00
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GitHub Copilot (GH-300) Practice Tests

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Microsoft GH-300 Practice Test 5

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.

Question 41

For this GitHub Copilot case, which implementation decision is best supported? An engineer is writing a repetitive data mapping function with a clear existing pattern.

  1. Request an initial script draft with quoting and failure handling.
  2. Generate initial model definitions and validate field constraints.
  3. Use Copilot to draft the translation with equivalence fixtures.
  4. Use Copilot to draft the repetitive mapping and review each field.

Explanation

Correct Answer

D:

Pattern-based generation can save time on predictable boilerplate. Acceptance evidence: Every required source field maps correctly under fixture tests.

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 engineer is writing a repetitive data mapping function with a clear existing pattern.

B:

Copilot can accelerate schema-to-code transformations. That recommendation is relevant to a different task: A user wants to convert a documented JSON schema into strongly typed application models. In this case the main need is: An engineer is writing a repetitive data mapping function with a clear existing pattern.

C:

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 engineer is writing a repetitive data mapping function with a clear existing pattern.

Question 42

A Copilot code suggestion matches old public source but has no active license notice. Which acceptance evidence should the team verify?

  1. The approved account logs in successfully with policy-compliant permissions.
  2. The final adopted code has reviewed licensing or a clean independent replacement.
  3. A controlled match is withheld under the effective client setting.
  4. Adopted code has approved provenance after independent verification.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: Adopted code has approved provenance after independent verification. The requested action was: Review the matching repository's current provenance and do not assume omission means free use.

Incorrect Answers

A:

“The approved account logs in successfully with policy-compliant permissions.” does not demonstrate the result required here: Adopted code has approved provenance after independent verification.

B:

“The final adopted code has reviewed licensing or a clean independent replacement.” does not demonstrate the result required here: Adopted code has approved provenance after independent verification.

C:

“A controlled match is withheld under the effective client setting.” does not demonstrate the result required here: Adopted code has approved provenance after independent verification.

Question 43

A platform team wants to audit policy changes made by administrators to Copilot settings. Select the most appropriate next action for the team.

  1. Configure model availability in the enterprise or organization policy controls.
  2. Check and enable the effective Copilot code review policy at authorized scope.
  3. Review the relevant GitHub organization or enterprise audit events.
  4. Filter auditable organization events by the relevant policy action and time.

Explanation

Correct Answer

C:

Audit logs help trace administrative actions and times. Acceptance evidence: A test policy edit appears with actor, event type, and timestamp.

Incorrect Answers

A:

Administrators can constrain supported model choices separately from general access. That recommendation is relevant to a different task: An enterprise needs to limit which AI models employees can select in Copilot. In this case the main need is: A platform team wants to audit policy changes made by administrators to Copilot settings.

B:

Higher-level settings can restrict repository-level feature use. That recommendation is relevant to a different task: A code review policy is disabled centrally, but a repo owner expects automatic reviews. In this case the main need is: A platform team wants to audit policy changes made by administrators to Copilot settings.

D:

Policy change history is more reliable than informal administrator recollections. That recommendation is relevant to a different task: A compliance officer needs to know who changed Copilot policy after a reported incident. In this case the main need is: A platform team wants to audit policy changes made by administrators to Copilot settings.

Question 44

A prompt includes contradictory instructions to both preserve and rename public interfaces. Select the most appropriate next action for the team.

  1. Explicitly restrict the task to analysis, patch proposals, and local tests.
  2. Resolve the conflict explicitly before generating a patch.
  3. Ask it to list assumptions and failure modes before implementing.
  4. Reset or explicitly disambiguate file paths and namespaces.

Explanation

Correct Answer

B:

Contradictory constraints cannot both be honored reliably. Acceptance evidence: The final prompt contains one consistent API contract.

Incorrect Answers

A:

Permission and side-effect boundaries belong in task instructions. That recommendation is relevant to a different task: A team needs a prompt that cannot accidentally request production deployment. In this case the main need is: A prompt includes contradictory instructions to both preserve and rename public interfaces.

C:

Explicit assumptions expose gaps that require user decisions. That recommendation is relevant to a different task: A model produces a plausible answer but does not state assumptions about concurrency. In this case the main need is: A prompt includes contradictory instructions to both preserve and rename public interfaces.

D:

Chat history can bias interpretation toward an earlier referent. That recommendation is relevant to a different task: A chat session discussed one module, but a follow-up asks about a different module with the same class name. In this case the main need is: A prompt includes contradictory instructions to both preserve and rename public interfaces.

Question 45

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A team needs to rename a deprecated helper across source and tests.

  1. Public API checks and tests pass after the rename.
  2. The proposed call-site list matches a source search.
  3. The final commit message describes the changed behavior and tests.
  4. Before-and-after fixtures produce identical outputs.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: Public API checks and tests pass after the rename. The requested action was: Use Copilot-assisted refactoring with a scoped, reviewed diff.

Incorrect Answers

B:

“The proposed call-site list matches a source search.” does not demonstrate the result required here: Public API checks and tests pass after the rename.

C:

“The final commit message describes the changed behavior and tests.” does not demonstrate the result required here: Public API checks and tests pass after the rename.

D:

“Before-and-after fixtures produce identical outputs.” does not demonstrate the result required here: Public API checks and tests pass after the rename.

Question 46

An assistant uses a function that existed in last year's SDK but was removed in the installed version. Select the most appropriate next action for the team.

  1. Avoid treating wording fluency as calibrated confidence.
  2. Break work into verifiable units and inspect all affected call sites.
  3. Use installed help and current official docs to select the supported flag.
  4. Check current package docs and the repository lockfile.

Explanation

Correct Answer

D:

Model knowledge can lag recent API changes. Acceptance evidence: The corrected implementation compiles against the installed version.

Incorrect Answers

A:

LLM surface confidence is not a trustworthy accuracy metric. That recommendation is relevant to a different task: A developer interprets high-confidence prose as an exact probability of correctness. In this case the main need is: An assistant uses a function that existed in last year's SDK but was removed in the installed version.

B:

A model may fail to account for distant dependencies. That recommendation is relevant to a different task: A large refactor request produces a partial change that leaves tests stale. In this case the main need is: An assistant uses a function that existed in last year's SDK but was removed in the installed version.

C:

CLI syntax and feature lifecycles evolve. That recommendation is relevant to a different task: An assistant suggests a deprecated CLI flag from an older product version. In this case the main need is: An assistant uses a function that existed in last year's SDK but was removed in the installed version.

Question 47

A software team reports this Copilot-related situation: A function must remain backward compatible but the initial prompt omits compatibility rules. Which action most directly satisfies the requirement?

  1. Ask for a minimal patch limited to the affected function and relevant tests.
  2. Include public API invariants and tests in the prompt.
  3. Create a reusable prompt file with focused instructions and context references.
  4. Include representative input and output examples in the prompt.

Explanation

Correct Answer

B:

Explicit negative constraints prevent unintended interface changes. Acceptance evidence: Callers using the previous signature still work.

Incorrect Answers

A:

Scope restrictions help maintain code reviewability. That recommendation is relevant to a different task: A request for a security fix allows broad changes that are hard to review. In this case the main need is: A function must remain backward compatible but the initial prompt omits compatibility rules.

C:

Reused prompt templates reduce accidental drift in task requirements. That recommendation is relevant to a different task: A candidate wants to improve responses to a recurring repository task without repeating a large prompt. In this case the main need is: A function must remain backward compatible but the initial prompt omits compatibility rules.

D:

Few-shot examples help constrain desired behavior and formatting. That recommendation is relevant to a different task: An engineer wants a function generated from a specification but has no sample calls. In this case the main need is: A function must remain backward compatible but the initial prompt omits compatibility rules.

Question 48

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A workspace requires the assistant to consider the currently selected failing assertion.

  1. The inserted assertion runs and fails if the implementation is deliberately broken.
  2. The proposed expression appears as an inline suggestion and is accepted deliberately.
  3. The proposed diagnosis cites the assertion and its actual expected values.
  4. The agent's actual diff and test logs correspond to the requested fix.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The proposed diagnosis cites the assertion and its actual expected values. The requested action was: Include the exact selection and relevant surrounding code in chat context.

Incorrect Answers

A:

“The inserted assertion runs and fails if the implementation is deliberately broken.” does not demonstrate the result required here: The proposed diagnosis cites the assertion and its actual expected values.

B:

“The proposed expression appears as an inline suggestion and is accepted deliberately.” does not demonstrate the result required here: The proposed diagnosis cites the assertion and its actual expected values.

D:

“The agent's actual diff and test logs correspond to the requested fix.” does not demonstrate the result required here: The proposed diagnosis cites the assertion and its actual expected values.

Question 49

For this Copilot practice scenario, which verification result is most relevant? An old synchronous HTTP client must be modernized to a supported asynchronous API.

  1. Integration tests confirm timeouts and cancellation remain correct.
  2. Examples compile and describe the method's real side effects.
  3. The learner can trace promise resolution and error propagation correctly.
  4. The summary references real incident timestamps and does not invent events.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: Integration tests confirm timeouts and cancellation remain correct. The requested action was: Use Copilot for a staged migration with behavior-preserving tests.

Incorrect Answers

B:

“Examples compile and describe the method's real side effects.” does not demonstrate the result required here: Integration tests confirm timeouts and cancellation remain correct.

C:

“The learner can trace promise resolution and error propagation correctly.” does not demonstrate the result required here: Integration tests confirm timeouts and cancellation remain correct.

D:

“The summary references real incident timestamps and does not invent events.” does not demonstrate the result required here: Integration tests confirm timeouts and cancellation remain correct.

Question 50

A Copilot Space links to a GitHub README that later changes. Which recommendation best addresses the stated constraint?

  1. Use the linked GitHub source instead of pasting a stale copy into every prompt.
  2. Provide explicit code review instructions with measurable guidelines.
  3. Use a task-specific prompt file instead of global instructions.
  4. Decline that tool command and request a plan that avoids destructive execution.

Explanation

Correct Answer

A:

GitHub-based sources in Spaces can refresh with repository updates. Acceptance evidence: A new question reflects the latest committed README content.

Incorrect Answers

B:

Custom review instructions can focus feedback on local standards. That recommendation is relevant to a different task: A project wants Copilot to flag style violations using repository standards. In this case the main need is: A Copilot Space links to a GitHub README that later changes.

C:

Prompt files can be invoked only for the relevant task. That recommendation is relevant to a different task: A task needs a repeatable test-generation instruction without changing repository-wide behavior. In this case the main need is: A Copilot Space links to a GitHub README that later changes.

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: A Copilot Space links to a GitHub README that later changes.