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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 24

Question 230

A user pastes malicious instructions from an untrusted issue comment into a Copilot task. Which acceptance evidence should the team verify?

  1. A controlled near-match yields the documented handling for that surface.
  2. The agent summarizes the issue but does not follow the injected command.
  3. The response changes appropriately when the precise relevant file is attached.
  4. Correlation works without storing secrets or entire protected prompts.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The agent summarizes the issue but does not follow the injected command. The requested action was: Treat the issue text as untrusted task data, not as higher-priority control instructions.

Incorrect Answers

A:

“A controlled near-match yields the documented handling for that surface.” does not demonstrate the result required here: The agent summarizes the issue but does not follow the injected command.

C:

“The response changes appropriately when the precise relevant file is attached.” does not demonstrate the result required here: The agent summarizes the issue but does not follow the injected command.

D:

“Correlation works without storing secrets or entire protected prompts.” does not demonstrate the result required here: The agent summarizes the issue but does not follow the injected command.

Question 231

A generated completion is displayed in the editor but should not alter source until accepted. Which recommendation best addresses the stated constraint?

  1. Keep generated output separate from committed code until user action.
  2. Describe model sampling and context sensitivity instead of treating suggestions as fixed compiler output.
  3. Review pre-inference input handling and post-generation output safeguards.
  4. Prioritize relevant context over sending all possible files.

Explanation

Correct Answer

A:

Inline suggestions require deliberate acceptance. Acceptance evidence: The Git diff stays unchanged when the suggestion is dismissed.

Incorrect Answers

B:

LLM inference is probabilistic and inputs can change subtly. That recommendation is relevant to a different task: A developer wants to explain why a completion is not guaranteed deterministic. In this case the main need is: A generated completion is displayed in the editor but should not alter source until accepted.

C:

Safety filtering can operate around the model as well as within prompts. That recommendation is relevant to a different task: An organization wants to understand where prompt safety filtering fits in suggestion generation. In this case the main need is: A generated completion is displayed in the editor but should not alter source until accepted.

D:

Context quality is often more important than raw prompt volume. That recommendation is relevant to a different task: A request uses an enormous project dependency tree yet Copilot answers a narrow bug correctly when a file is referenced. In this case the main need is: A generated completion is displayed in the editor but should not alter source until accepted.

Question 232

An editor user wants Copilot to complete a short Python expression while they type. Select the most appropriate next action for the team.

  1. Use inline suggestions in a supported Copilot-enabled IDE.
  2. Choose inline suggestions instead of agent-mode editing.
  3. Dismiss the inline suggestion without accepting it.
  4. Check effective organization policies and plan availability first.

Explanation

Correct Answer

A:

Inline completion predicts code near the cursor without a chat conversation. Acceptance evidence: The proposed expression appears as an inline suggestion and is accepted deliberately.

Incorrect Answers

B:

Interaction modes offer different levels of initiative. That recommendation is relevant to a different task: A user wants Copilot to produce small code completions, not autonomously modify the workspace. In this case the main need is: An editor user wants Copilot to complete a short Python expression while they type.

C:

Generated completion is optional and should not be inserted automatically. That recommendation is relevant to a different task: A developer sees a pale suggestion but wants to keep existing code unchanged. In this case the main need is: An editor user wants Copilot to complete a short Python expression while they type.

D:

IDE capabilities can be limited by policy, license, or extension support. That recommendation is relevant to a different task: An organization disables a Copilot capability but a developer expects the mode picker to expose it. In this case the main need is: An editor user wants Copilot to complete a short Python expression while they type.

Question 233

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? An engineer says Copilot's model must possess current repository status even without access to it.

  1. The answer updates only after actual current repository evidence is provided.
  2. An approved harmless request succeeds while the disallowed output remains suppressed.
  3. The answer reflects the referenced function description with the correct path.
  4. The Git diff stays unchanged when the suggestion is dismissed.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The answer updates only after actual current repository evidence is provided. The requested action was: Clarify the distinction between learned knowledge and fresh authorized retrieval.

Incorrect Answers

B:

“An approved harmless request succeeds while the disallowed output remains suppressed.” does not demonstrate the result required here: The answer updates only after actual current repository evidence is provided.

C:

“The answer reflects the referenced function description with the correct path.” does not demonstrate the result required here: The answer updates only after actual current repository evidence is provided.

D:

“The Git diff stays unchanged when the suggestion is dismissed.” does not demonstrate the result required here: The answer updates only after actual current repository evidence is provided.

Question 234

A billing endpoint may process the same webhook multiple times after retry. Select the most appropriate next action for the team.

  1. Generate decimal precision tests with expected financial rounding.
  2. Generate security regression tests for issuer, audience, and expiry checks.
  3. Generate idempotency tests using duplicate event IDs.
  4. Generate tests for authorization boundaries and token claim validation.

Explanation

Correct Answer

C:

At-least-once delivery must not duplicate business effects. Acceptance evidence: Replaying one event creates exactly one charge.

Incorrect Answers

A:

Financial assertions must use well-defined precision. That recommendation is relevant to a different task: A payment calculation uses floating-point arithmetic and fails on rounding cases. In this case the main need is: A billing endpoint may process the same webhook multiple times after retry.

B:

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 billing endpoint may process the same webhook multiple times after retry.

D:

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: A billing endpoint may process the same webhook multiple times after retry.

Question 235

A software team reports this Copilot-related situation: A developer needs the currently supported command flags after a CLI update. Which action most directly satisfies the requirement?

  1. Inspect the current context usage via the documented context command.
  2. Read the installed copilot help output rather than using legacy assumptions.
  3. Open the CLI help using /help in the interactive session.
  4. Upgrade Node to the documented supported prerequisite before installation.

Explanation

Correct Answer

B:

CLI flags may evolve between versions. Acceptance evidence: The selected invocation matches current help and exits cleanly.

Incorrect Answers

A:

Session windows have limits and can include tool output and history. That recommendation is relevant to a different task: A Copilot CLI session is consuming more context than expected during long debugging. In this case the main need is: A developer needs the currently supported command flags after a CLI update.

C:

Documented help reflects installed version capabilities. That recommendation is relevant to a different task: An engineer needs to find the available CLI slash commands without memorizing them. In this case the main need is: A developer needs the currently supported command flags after a CLI update.

D:

The npm distribution has a minimum Node runtime requirement. That recommendation is relevant to a different task: A Linux engineer installs via npm but the required Node.js version is too old. In this case the main need is: A developer needs the currently supported command flags after a CLI update.

Question 236

A teammate requests advice on a build error but has not provided the actual diagnostics. Following the chosen solution, what evidence best proves that it worked?

  1. The allowed mode appears only under an eligible authorized account.
  2. The diff identifies exactly which tests and source files were modified.
  3. The suggested fix addresses the reproduced error in a clean build.
  4. The accepted revision builds against the installed supported API.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The suggested fix addresses the reproduced error in a clean build. The requested action was: Attach sanitized error output and build configuration to Copilot Chat.

Incorrect Answers

A:

“The allowed mode appears only under an eligible authorized account.” does not demonstrate the result required here: The suggested fix addresses the reproduced error in a clean build.

B:

“The diff identifies exactly which tests and source files were modified.” does not demonstrate the result required here: The suggested fix addresses the reproduced error in a clean build.

D:

“The accepted revision builds against the installed supported API.” does not demonstrate the result required here: The suggested fix addresses the reproduced error in a clean build.

Question 237

A Copilot agent tries to use an MCP tool that has broader permissions than the ticket requires. Which acceptance evidence should the team verify?

  1. The primary agent receives file findings without the subagent changing code.
  2. The agent completes the specific lookup but cannot modify unrelated systems.
  3. Review comments cite actual violations instead of generic style advice.
  4. The agent completes a non-destructive analysis without running the script.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The agent completes the specific lookup but cannot modify unrelated systems. The requested action was: Restrict the MCP server credentials and tool allowlist before continuing.

Incorrect Answers

A:

“The primary agent receives file findings without the subagent changing code.” does not demonstrate the result required here: The agent completes the specific lookup but cannot modify unrelated systems.

C:

“Review comments cite actual violations instead of generic style advice.” does not demonstrate the result required here: The agent completes the specific lookup but cannot modify unrelated systems.

D:

“The agent completes a non-destructive analysis without running the script.” does not demonstrate the result required here: The agent completes the specific lookup but cannot modify unrelated systems.

Question 238

A software team reports this Copilot-related situation: A long prompt includes secrets and unrelated production logs. Which action most directly satisfies the requirement?

  1. Remove sensitive material and provide only sanitized relevant extracts.
  2. Provide a documentation style example and the actual function signature.
  3. Ask for a minimal patch limited to the affected function and relevant tests.
  4. Specify operating system, shell, quoting rules, and side-effect restrictions.

Explanation

Correct Answer

A:

Data minimization also improves signal in model context. Acceptance evidence: The model reasons from a minimal safe log sample.

Incorrect Answers

B:

Few-shot documentation context can establish required structure. That recommendation is relevant to a different task: A user wants Copilot to document a function in a particular format. In this case the main need is: A long prompt includes secrets and unrelated production logs.

C:

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 long prompt includes secrets and unrelated production logs.

D:

Command correctness depends on shell and platform specifics. That recommendation is relevant to a different task: A developer wants to generate a CLI command for an unfamiliar shell environment. In this case the main need is: A long prompt includes secrets and unrelated production logs.

Question 239

A code review unexpectedly mentions a file that administrators intended to exclude. Which recommendation best addresses the stated constraint?

  1. Treat absence of a reference as inconclusive and apply normal provenance review.
  2. Verify entitlement, repository access and organizational policy.
  3. Verify the exclusion pattern and relevant supported review surface.
  4. Inspect whether the file path matches an active exclusion rule.

Explanation

Correct Answer

C:

Incorrect rules or unsupported surfaces can leave intended exclusions ineffective. Acceptance evidence: The corrected review no longer incorporates restricted content.

Incorrect Answers

A:

The public-code index is incomplete and references may not appear for every match. That recommendation is relevant to a different task: A developer sees a suggestion with no code-reference notice and assumes it has zero copyright risk. In this case the main need is: A code review unexpectedly mentions a file that administrators intended to exclude.

B:

Availability depends on multiple authorization layers. That recommendation is relevant to a different task: Suggestions work in public code but not in a private repository after a seat change. In this case the main need is: A code review unexpectedly mentions a file that administrators intended to exclude.

D:

An excluded current file may no longer receive inline suggestions. That recommendation is relevant to a different task: Copilot stops suggesting in one file after an organization adds content exclusions. In this case the main need is: A code review unexpectedly mentions a file that administrators intended to exclude.

Question 240

A request for a security fix allows broad changes that are hard to review. Following the chosen solution, what evidence best proves that it worked?

  1. The diff is small and passes security regression checks.
  2. Only permitted files change and targeted tests pass.
  3. The output passes the requested Python interpreter syntax check.
  4. The proposed command passes a safe dry run on the target shell.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The diff is small and passes security regression checks. The requested action was: Ask for a minimal patch limited to the affected function and relevant tests.

Incorrect Answers

B:

“Only permitted files change and targeted tests pass.” does not demonstrate the result required here: The diff is small and passes security regression checks.

C:

“The output passes the requested Python interpreter syntax check.” does not demonstrate the result required here: The diff is small and passes security regression checks.

D:

“The proposed command passes a safe dry run on the target shell.” does not demonstrate the result required here: The diff is small and passes security regression checks.