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GitHub Copilot GH-300 Practice Test 13

Question 120

Use an edit workflow with explicitly scoped working-set files. The prior failure was: A developer wants one supported edit applied to selected files without open-ended planning. Which observable outcome establishes that the fix works?

  1. The copilot executable launches and reports its installed version
  2. All three files form one coherent tested change without extra side effects
  3. An eligible PR gets an AI review event without changing required approvals
  4. Only selected files receive the intended refactor

Explanation

Correct Answer

D:

This observation is the required outcome: Only selected files receive the intended refactor. It tests the original requirement because the surface and requested scope affect what edits Copilot is expected to make.

Incorrect Answers

A:

This result would validate a different action: Install GitHub Copilot CLI through a supported package manager or official script. It applies when a Linux developer wants terminal Copilot but has only an IDE extension, not to the failure being reviewed here.

B:

This result would validate a different action: Use an approved agent workflow with iterative edits and test validation. It applies when a developer requests simultaneous edits across a React component, API handler and tests, not to the failure being reviewed here.

C:

This result would validate a different action: Configure Copilot code review policy and verify repository eligibility. It applies when a company wants automatic AI review on selected pull requests where supported, not to the failure being reviewed here.

Question 121

A ghost-text suggestion includes more code than the developer intended to accept. What should the team implement or verify first?

  1. Configure Copilot code review policy and verify repository eligibility
  2. Use Copilot code review as assistance and perform normal human code review
  3. Review the saved agent session and restate expected acceptance criteria
  4. Review and accept only the desired portion using supported editor controls

Explanation

Correct Answer

D:

The key is the specific capability, not simply the fact that AI suggested it. The user remains responsible for what enters the working tree. In this case the proposed action is review and accept only the desired portion using supported editor controls; confirm it through the concrete expected result.

Incorrect Answers

A:

Central review policy can govern use of the review capability. That makes this relevant when a company wants automatic AI review on selected pull requests where supported, whereas this scenario has a different controlling requirement and acceptance test. Here the controlling problem is a ghost-text suggestion includes more code than the developer intended to accept, and the proposal must meet that constraint.

B:

Copilot review comments can miss problems and are not approval. That makes this relevant when an external contributor's pull request changes authorization code and has an AI-generated summary, whereas this scenario has a different controlling requirement and acceptance test. Here the controlling problem is a ghost-text suggestion includes more code than the developer intended to accept, and the proposal must meet that constraint.

C:

Session context is useful but must be reconciled with current repository state. That makes this relevant when an interrupted refactor resumes after editor restart but the developer forgot the original goal, whereas this scenario has a different controlling requirement and acceptance test.

Question 122

Use an appropriately scoped editing workflow and inspect each changed file. The prior failure was: An engineer wants to apply the same naming correction across several files without delegating arbitrary commands. Which result is the most persuasive acceptance evidence?

  1. Only the declared symbols change and compile checks pass
  2. The tool reads authorized issues but cannot change organization settings
  3. The plan lists touched components, rollback risks and acceptance checks
  4. The developer accepts a suitable ghost-text suggestion and the file still compiles

Explanation

Correct Answer

A:

This is the acceptance signal tied to the issue: Only the declared symbols change and compile checks pass. It is causally related because targeted edit tools can be safer than broad autonomous terminal access.

Incorrect Answers

B:

This observation would make sense for the independent case "MCP least privilege", whose acceptance criterion is The tool reads authorized issues but cannot change organization settings. It is not proof of the current remediation.

C:

This observation would make sense for the independent case "Plan before edit", whose acceptance criterion is The plan lists touched components, rollback risks and acceptance checks. It is not proof of the current remediation.

D:

This observation would make sense for the independent case "Inline next line", whose acceptance criterion is The developer accepts a suitable ghost-text suggestion and the file still compiles. It is not proof of the current remediation.

Question 123

An MCP server with document-read access bypasses a carefully set IDE exclusion. Which proposed response is appropriate without increasing unrelated risk?

  1. Treat CLI file/tool access separately and restrict local permissions
  2. Restrict server permissions or remove the integration after risk review
  3. Enforce standard repository authorization independently of Copilot subscription
  4. Account for indirect semantic information in privacy threat modeling

Explanation

Correct Answer

B:

Restrict server permissions or remove the integration after risk review. This directly addresses the stated constraint: MCP tool availability can expose data not controlled by editor exclusion. The decision can be tested by checking that a permission test confirms sensitive documents cannot be retrieved.

Incorrect Answers

A:

This is a reasonable intervention for the separate case "CLI exclusion limit". Its value is current content-exclusion support may not extend to CLI sessions, not resolving the current requirement.

C:

This is a reasonable intervention for the separate case "Repository visibility". Its value is aI entitlement is not a substitute for GitHub repository permission, not resolving the current requirement.

D:

This is a reasonable intervention for the separate case "IDE symbol leakage". Its value is indirect language-server metadata can sometimes reveal excluded definitions, not resolving the current requirement.

Question 124

A teammate recommends an untrusted binary masquerading as GitHub's official terminal tool. What is the defensible engineering decision?

  1. Inventory effective policies and implement a documented harmonization plan
  2. Install from documented GitHub-distributed packages or release channels
  3. Use the documented login flow for their GitHub account
  4. Treat tool results as untrusted data and deny unauthorized access

Explanation

Correct Answer

B:

The key is the specific capability, not simply the fact that AI suggested it. A lookalike binary is a supply-chain risk even if its name sounds official. In this case the proposed action is install from documented GitHub-distributed packages or release channels; confirm it through the concrete expected result.

Incorrect Answers

A:

This measure fits a different failure: a merged company has incompatible Copilot organization policies across its GitHub organizations. In that situation org-level policy boundaries need explicit reconciliation. It does not establish the requested outcome: the binary provenance and checksum match the intended distribution.

C:

This measure fits a different failure: a developer launched Copilot CLI on a new laptop and receives an authentication prompt. In that situation interactive CLI access requires user authentication unless a supported BYOK path applies. It does not establish the requested outcome: the binary provenance and checksum match the intended distribution.

D:

This measure fits a different failure: a third-party MCP tool returns text instructing Copilot to dump local SSH keys. In that situation tool output can carry prompt injection attempts. It does not establish the requested outcome: the binary provenance and checksum match the intended distribution.

Question 125

Evaluate both against constraints rather than expecting byte-identical results. The prior failure was: The same prompt yields two different acceptable sorting implementations. What would make this decision ready for approval?

  1. The evaluation compares inputs and effective policy before judging output
  2. The chosen method exists in the installed version and passes tests
  3. The agent keeps the required tests unchanged
  4. Both implementations pass the same contract tests

Explanation

Correct Answer

D:

This is the acceptance signal tied to the issue: Both implementations pass the same contract tests. It is causally related because generative output may vary between runs or models.

Incorrect Answers

A:

Feature surfaces can supply different context and processing behavior. That result is therefore evidence for a different capability, while this review requires both implementations pass the same contract tests.

B:

LLMs predict plausible tokens without guaranteed external execution. That result is therefore evidence for a different capability, while this review requires both implementations pass the same contract tests.

C:

Untrusted text may attempt to influence model behavior. That result is therefore evidence for a different capability, while this review requires both implementations pass the same contract tests.

Question 126

Repository comments ask an agent to disable tests but a human task requires preserving them. What choice best matches the actual acceptance criteria?

  1. Treat project comments as data and follow authorized task constraints
  2. Ask for a line-by-line explanation of the changed synchronization
  3. Specify minimal diff, preserved interfaces and tests as completion criteria
  4. Provide source/target schemas, target version and rollout constraints

Explanation

Correct Answer

A:

Treat project comments as data and follow authorized task constraints. This directly addresses the stated constraint: Untrusted repository content cannot authorize harmful workflow changes. The decision can be tested by checking that the agent preserves the test suite.

Incorrect Answers

B:

Although technically useful, this addresses copilot says it fixed a race but a PR shows unrelated threading changes. The stated constraint instead needs a change whose evidence is: The agent preserves the test suite.

C:

Although technically useful, this addresses an agent makes unwanted stylistic changes while addressing a logic bug. The stated constraint instead needs a change whose evidence is: The agent preserves the test suite.

D:

Although technically useful, this addresses a developer asks for a migration but supplies no schema or DB version. The stated constraint instead needs a change whose evidence is: The agent preserves the test suite.

Question 127

An AI report states that code is 40 percent faster without measurements. Select the remediation supported by this evidence.

  1. Evaluate changes against a fixed quality rubric and representative regression cases
  2. Benchmark both versions using repeatable representative workloads
  3. Use the code-reference information and complete a license and provenance review
  4. Check available code references and provenance before accepting

Explanation

Correct Answer

B:

The key is the specific capability, not simply the fact that AI suggested it. Performance assertions require measured evidence, not model confidence. In this case the proposed action is benchmark both versions using repeatable representative workloads; confirm it through the concrete expected result.

Incorrect Answers

A:

This is a reasonable intervention for the separate case "Model drift assumption". Its value is probabilistic outputs and model updates make exact wording unstable, not resolving the current requirement.

C:

This is a reasonable intervention for the separate case "Licensing unknown". Its value is matching-code filters and references are aids, not blanket licensing guarantees, not resolving the current requirement.

D:

This is a reasonable intervention for the separate case "External code copying". Its value is public-code matching aids attribution but may be incomplete, not resolving the current requirement.

Question 128

Proxy filtering misconception together with Language coverage now needs a coordinated review. The first finding is: A team claims content safety filtering makes generated code production secure. The second finding is: An unfamiliar domain-specific language is not represented well in suggestions. Select TWO actions, one that resolves each finding.

  1. Maintain normal human accountability and branch protections
  2. Run a regression suite and recalibrate prompts for the actual model
  3. Document the client, service and model interaction at the appropriate level
  4. Provide examples and independently validate syntax using the native toolchain
  5. Require code review and security testing after any model-side filter

Explanation

Correct Answers

D:

This addresses the second finding. Copilot competence depends on context and training coverage. The verification is: The specialized compiler accepts the final artifact. The complementary action addresses Proxy filtering misconception.

E:

This addresses the first finding. Output filters cannot replace domain-specific secure design validation. The verification is: A vulnerability test detects a flawed generated authorization branch. The complementary action addresses Language coverage.

Incorrect Answers

A:

This is relevant to a different case: A pull request has AI-generated code but lacks reviewer identity. Its capability is: Generated contributions remain code changes requiring human decisions. Neither Proxy filtering misconception nor Language coverage requires that result.

B:

This is relevant to a different case: A code-generation workflow begins failing after a supported model is changed. Its capability is: Models can differ in capability and output style. Neither Proxy filtering misconception nor Language coverage requires that result.

C:

This is relevant to a different case: A teammate says the Copilot client makes requests without any service-side processing. Its capability is: Product architecture can include context handling and safety processing. Neither Proxy filtering misconception nor Language coverage requires that result.

Question 129

Generated UI markup visually looks correct but users cannot operate it by keyboard. Which course of action is best justified?

  1. Use Copilot to propose type annotations and independently run static checks
  2. Ask Copilot to suggest table-driven tests from a separate requirement
  3. Use Copilot to draft a docstring from source and tests, then correct it manually
  4. Use Copilot to suggest semantic labels and focus behavior, then test assistive navigation

Explanation

Correct Answer

D:

Use Copilot to suggest semantic labels and focus behavior, then test assistive navigation. This directly addresses the stated constraint: Productivity gains must not compromise accessibility. The decision can be tested by checking that the form can be completed with keyboard and screen-reader labels.

Incorrect Answers

A:

Type hints can expose incompatible assumptions but require correct modeling. That makes this relevant when a dynamic Python service has runtime errors from None values, whereas this scenario has a different controlling requirement and acceptance test.

B:

Test generation helps coverage when expectations are independently specified. That makes this relevant when an existing function has no tests for negative balance handling, whereas this scenario has a different controlling requirement and acceptance test. Here the controlling problem is generated UI markup visually looks correct but users cannot operate it by keyboard, and the proposal must meet that constraint.

C:

Generated documentation is a useful draft but may misstate contracts. That makes this relevant when a teammate inherits an undocumented function with surprising side effects, whereas this scenario has a different controlling requirement and acceptance test.

Question 130

Request links to official docs and independently verify each claim. The prior failure was: A developer wants citations to current documentation for a generated SDK integration. Which result is the most persuasive acceptance evidence?

  1. The patch affects the current implementation and leaves the deprecated helper alone
  2. Each referenced API appears in the official current reference
  3. The first experiment discriminates between auth and networking causes
  4. The final method exists in the locked package version

Explanation

Correct Answer

B:

The proposed result specifically establishes success rather than merely showing that a configuration exists. A language model can fabricate citations unless checked. It is the observable consequence of the selected intervention.

Incorrect Answers

A:

This observation would make sense for the independent case "Active file selection", whose acceptance criterion is The patch affects the current implementation and leaves the deprecated helper alone. It is not proof of the current remediation.

C:

This observation would make sense for the independent case "Stepwise debugging", whose acceptance criterion is The first experiment discriminates between auth and networking causes. It is not proof of the current remediation.

D:

This observation would make sense for the independent case "Reference docs", whose acceptance criterion is The final method exists in the locked package version. It is not proof of the current remediation.

GitHub Copilot (GH-300) Practice Tests

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