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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 17

Question 160

A developer requests a high-level refactor but the agent wants to run an untrusted migration script. Following the chosen solution, what evidence best proves that it worked?

  1. The eligible user can query the scoped Space without receiving forbidden data.
  2. The agent completes a non-destructive analysis without running the script.
  3. The agent produces a scoped diff and test output for review.
  4. The agent completes the specific lookup but cannot modify unrelated systems.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The agent completes a non-destructive analysis without running the script. The requested action was: Decline that tool command and request a plan that avoids destructive execution.

Incorrect Answers

A:

“The eligible user can query the scoped Space without receiving forbidden data.” does not demonstrate the result required here: The agent completes a non-destructive analysis without running the script.

C:

“The agent produces a scoped diff and test output for review.” does not demonstrate the result required here: The agent completes a non-destructive analysis without running the script.

D:

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

Question 161

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? An endpoint must reject invalid authorization tokens while still allowing valid ones.

  1. Valid tokens pass, invalid tokens fail, and approved verification primitives remain in use.
  2. Both mocked expectations and the provider contract tests pass.
  3. Invalid tokens fail and a correctly scoped token succeeds.
  4. A token missing the required claim is denied.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: Invalid tokens fail and a correctly scoped token succeeds. The requested action was: Generate security regression tests for issuer, audience, and expiry checks.

Incorrect Answers

A:

“Valid tokens pass, invalid tokens fail, and approved verification primitives remain in use.” does not demonstrate the result required here: Invalid tokens fail and a correctly scoped token succeeds.

B:

“Both mocked expectations and the provider contract tests pass.” does not demonstrate the result required here: Invalid tokens fail and a correctly scoped token succeeds.

D:

“A token missing the required claim is denied.” does not demonstrate the result required here: Invalid tokens fail and a correctly scoped token succeeds.

Question 162

A developer wants a reliable generated migration script for a complex schema. Following the chosen solution, what evidence best proves that it worked?

  1. The answer targets the specified new module and tests.
  2. Each subtask passes its focused tests before moving on.
  3. The corrected patch passes both old and new tests.
  4. The migration passes staging tests and rollback verification.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: The migration passes staging tests and rollback verification. The requested action was: Iterate through planning, sandbox execution, observed errors, and final review.

Incorrect Answers

A:

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

B:

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

C:

“The corrected patch passes both old and new tests.” does not demonstrate the result required here: The migration passes staging tests and rollback verification.

Question 163

For this Copilot practice scenario, which verification result is most relevant? A developer asks Copilot to explain a stack trace with no failing code attached.

  1. The output passes the requested Python interpreter syntax check.
  2. Invocations consistently apply the required checks to different files.
  3. Malformed fixtures fail consistently and valid fixtures parse.
  4. The analysis identifies a reproducing call site instead of guessing.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: The analysis identifies a reproducing call site instead of guessing. The requested action was: Include the error, relevant call path and environment in context.

Incorrect Answers

A:

“The output passes the requested Python interpreter syntax check.” does not demonstrate the result required here: The analysis identifies a reproducing call site instead of guessing.

B:

“Invocations consistently apply the required checks to different files.” does not demonstrate the result required here: The analysis identifies a reproducing call site instead of guessing.

C:

“Malformed fixtures fail consistently and valid fixtures parse.” does not demonstrate the result required here: The analysis identifies a reproducing call site instead of guessing.

Question 164

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A repository has a sensitive remote-mounted folder that exclusions do not cover.

  1. Explicit attack fixtures and human review supplement AI-generated checks.
  2. A test account cannot read the protected directory.
  3. The CLI cannot read protected paths under explicit filesystem controls.
  4. The approved account logs in successfully with policy-compliant permissions.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: A test account cannot read the protected directory. The requested action was: Use repository-level ACL and tool access limitations.

Incorrect Answers

A:

“Explicit attack fixtures and human review supplement AI-generated checks.” does not demonstrate the result required here: A test account cannot read the protected directory.

C:

“The CLI cannot read protected paths under explicit filesystem controls.” does not demonstrate the result required here: A test account cannot read the protected directory.

D:

“The approved account logs in successfully with policy-compliant permissions.” does not demonstrate the result required here: A test account cannot read the protected directory.

Question 165

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? A model gives a very specific bug diagnosis before seeing the stack trace.

  1. Follow-up logs omit the key and the old credential is invalidated.
  2. The chosen command passes its installed version's argument parser.
  3. The diagnosis matches a reproduced failing test and error trace.
  4. The test runner exits successfully for the target revision.

Explanation

Correct Answer

C:

This outcome directly checks the intended behavior: The diagnosis matches a reproduced failing test and error trace. The requested action was: Label the diagnosis as a hypothesis and obtain logs or a reproducer.

Incorrect Answers

A:

“Follow-up logs omit the key and the old credential is invalidated.” does not demonstrate the result required here: The diagnosis matches a reproduced failing test and error trace.

B:

“The chosen command passes its installed version's argument parser.” does not demonstrate the result required here: The diagnosis matches a reproduced failing test and error trace.

D:

“The test runner exits successfully for the target revision.” does not demonstrate the result required here: The diagnosis matches a reproduced failing test and error trace.

Question 166

A project lead describes the following situation: A session's tool output contains a pasted API key that should not persist in prompts. What should the developer do first?

  1. Break work into verifiable units and inspect all affected call sites.
  2. Specify constraints and tests rather than demanding identical stochastic outputs.
  3. Specify the exact dependency version and constrain examples accordingly.
  4. Redact the key and rotate it under incident policy before further analysis.

Explanation

Correct Answer

D:

Tool output can become model context and create secret exposure. Acceptance evidence: Follow-up logs omit the key and the old credential is invalidated.

Incorrect Answers

A:

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: A session's tool output contains a pasted API key that should not persist in prompts.

B:

Generation can vary even when the prompt goal is similar. That recommendation is relevant to a different task: A team gets different valid implementations when repeating a broad prompt. In this case the main need is: A session's tool output contains a pasted API key that should not persist in prompts.

C:

Model generations may blend incompatible API eras. That recommendation is relevant to a different task: A completion mixes two library versions in one response. In this case the main need is: A session's tool output contains a pasted API key that should not persist in prompts.

Question 167

After addressing this GitHub Copilot situation, what result most directly demonstrates that the requirement is met? An engineer must create descriptive commit messages for a multi-file fix.

  1. All endpoints retain equivalent error behavior after extraction.
  2. The final commit message describes the changed behavior and tests.
  3. The summary references real incident timestamps and does not invent events.
  4. Every required source field maps correctly under fixture tests.

Explanation

Correct Answer

B:

This outcome directly checks the intended behavior: The final commit message describes the changed behavior and tests. The requested action was: Ask Copilot to summarize the actual diff and edit the message manually.

Incorrect Answers

A:

“All endpoints retain equivalent error behavior after extraction.” does not demonstrate the result required here: The final commit message describes the changed behavior and tests.

C:

“The summary references real incident timestamps and does not invent events.” does not demonstrate the result required here: The final commit message describes the changed behavior and tests.

D:

“Every required source field maps correctly under fixture tests.” does not demonstrate the result required here: The final commit message describes the changed behavior and tests.

Question 168

A software team reports this Copilot-related situation: A junior developer is struggling to understand an unfamiliar async/await flow. Which action most directly satisfies the requirement?

  1. Ask Copilot to draft documentation from the actual signature and tests.
  2. Ask Copilot Chat for a step-by-step explanation using the actual code.
  3. Ask Copilot to follow existing module structure and test conventions.
  4. Ask Copilot to summarize the actual diff and edit the message manually.

Explanation

Correct Answer

B:

Conversational explanation can accelerate learning and reduce context switching. Acceptance evidence: The learner can trace promise resolution and error propagation correctly.

Incorrect Answers

A:

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: A junior developer is struggling to understand an unfamiliar async/await flow.

C:

Local examples can guide useful scaffolding. That recommendation is relevant to a different task: A team needs scaffolding for a new service module consistent with its repository. In this case the main need is: A junior developer is struggling to understand an unfamiliar async/await flow.

D:

AI summaries can speed documentation of code changes. That recommendation is relevant to a different task: An engineer must create descriptive commit messages for a multi-file fix. In this case the main need is: A junior developer is struggling to understand an unfamiliar async/await flow.

Question 169

An engineer wants to know if tests can detect a deliberately inverted comparison. Following the chosen solution, what evidence best proves that it worked?

  1. Discount tests cover the zero, threshold, and upper-bound cases.
  2. A revoked access rule takes effect within the required period.
  3. An injection fixture is treated as data and cannot change query structure.
  4. The comparison mutant is killed by the test suite.

Explanation

Correct Answer

D:

This outcome directly checks the intended behavior: The comparison mutant is killed by the test suite. The requested action was: Introduce mutation testing and evaluate test failures.

Incorrect Answers

A:

“Discount tests cover the zero, threshold, and upper-bound cases.” does not demonstrate the result required here: The comparison mutant is killed by the test suite.

B:

“A revoked access rule takes effect within the required period.” does not demonstrate the result required here: The comparison mutant is killed by the test suite.

C:

“An injection fixture is treated as data and cannot change query structure.” does not demonstrate the result required here: The comparison mutant is killed by the test suite.

Question 170

A generated unit-test example includes real email addresses from an internal issue. Which acceptance evidence should the team verify?

  1. The committed fixture contains no live personal addresses.
  2. Approved implementation meets documented consent and retention controls.
  3. Every uptime claim has an identified evidence source.
  4. The query excludes unrelated personal attributes and passes documented review cases.

Explanation

Correct Answer

A:

This outcome directly checks the intended behavior: The committed fixture contains no live personal addresses. The requested action was: Replace sensitive values with fictional fixtures and minimize prompt context.

Incorrect Answers

B:

“Approved implementation meets documented consent and retention controls.” does not demonstrate the result required here: The committed fixture contains no live personal addresses.

C:

“Every uptime claim has an identified evidence source.” does not demonstrate the result required here: The committed fixture contains no live personal addresses.

D:

“The query excludes unrelated personal attributes and passes documented review cases.” does not demonstrate the result required here: The committed fixture contains no live personal addresses.