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Microsoft GH-300 Practice Test 41

Question 400

A numeric conversion helper overflows on large values. What tests should be generated?

  1. Include explicit empty-file and missing-header outcomes with expected errors.
  2. Exercise maximum supported ranges and assert overflow handling.
  3. Compare case variants and confirm the intended normalization rule.
  4. Add negative tests for wrong credentials, expired sessions, and unauthorized resources.

Explanation

Correct Answer

B:

Extreme values reveal safety behavior absent from typical examples.

Incorrect Answers

A:

Input boundaries frequently expose parsing defects. What tests should be generated. Extreme values reveal safety behavior absent from typical examples.

C:

Case-folding is a functional contract that simple examples may miss. extreme values reveal safety behavior absent from typical examples.

D:

Security-sensitive behavior is often defined by the denial paths. Extreme values reveal safety behavior absent from typical examples.

Question 401

A generated client passes unit tests but sends the wrong HTTP header to a payment API. What test is needed?

  1. Run consumer-driven contract tests and compatibility checks.
  2. Add an integration or contract test for method, headers, payload, and response handling.
  3. Test timeouts, rate limiting, transient failures, and error-body parsing.
  4. Exercise duplicate requests with idempotency keys and confirm exactly-once business effects.

Explanation

Correct Answer

B:

Correct local logic does not establish remote API compatibility.

Incorrect Answers

A:

Producers and consumers can fail even when both compile independently. What test is needed. Correct local logic does not establish remote API compatibility.

C:

Robust integrations handle more than a happy-path mock. correct local logic does not establish remote API compatibility.

D:

Network retries may repeat messages and require application-level deduplication. correct local logic does not establish remote API compatibility.

Question 402

A service writes to a database and publishes an event. What failure scenario should tests cover?

  1. Verify behavior when the database commits but event publication fails.
  2. Exercise duplicate requests with idempotency keys and confirm exactly-once business effects.
  3. Add an integration or contract test for method, headers, payload, and response handling.
  4. Run consumer-driven contract tests and compatibility checks.

Explanation

Correct Answer

A:

Partial distributed operations need explicit consistency or retry strategies.

Incorrect Answers

B:

Network retries may repeat messages and require application-level deduplication. partial distributed operations need explicit consistency or retry strategies.

C:

Correct local logic does not establish remote API compatibility. Partial distributed operations need explicit consistency or retry strategies.

D:

Producers and consumers can fail even when both compile independently. What failure scenario should tests cover. Partial distributed operations need explicit consistency or retry strategies.

Question 403

Copilot creates a mock always returning successful API responses. What should be added?

  1. Test timeouts, rate limiting, transient failures, and error-body parsing.
  2. Verify behavior when the database commits but event publication fails.
  3. Exercise duplicate requests with idempotency keys and confirm exactly-once business effects.
  4. Add an integration or contract test for method, headers, payload, and response handling.

Explanation

Correct Answer

A:

Robust integrations handle more than a happy-path mock.

Incorrect Answers

B:

Partial distributed operations need explicit consistency or retry strategies. robust integrations handle more than a happy-path mock.

C:

Network retries may repeat messages and require application-level deduplication. robust integrations handle more than a happy-path mock.

D:

Correct local logic does not establish remote API compatibility. Robust integrations handle more than a happy-path mock.

Question 404

A schema change is applied to one service while consumers use the prior format. What should be validated?

  1. Add an integration or contract test for method, headers, payload, and response handling.
  2. Run consumer-driven contract tests and compatibility checks.
  3. Verify behavior when the database commits but event publication fails.
  4. Test timeouts, rate limiting, transient failures, and error-body parsing.

Explanation

Correct Answer

B:

Producers and consumers can fail even when both compile independently.

Incorrect Answers

A:

Correct local logic does not establish remote API compatibility. Producers and consumers can fail even when both compile independently.

C:

Partial distributed operations need explicit consistency or retry strategies. producers and consumers can fail even when both compile independently.

D:

Robust integrations handle more than a happy-path mock. What should be validated. Producers and consumers can fail even when both compile independently.

Question 405

A payment service uses retries and asynchronous event publication. Which TWO integration tests are especially important? (Select TWO.)

  1. Simulate a database commit followed by failed event publication.
  2. Remove error-body handling to simplify the client.
  3. Verify duplicate retries cannot create duplicate payment effects.
  4. Assume local unit tests prove remote API contract compatibility.
  5. Test only a successful response from an always-successful mock.

Explanation

Correct Answers

A:

Partial failure can create inconsistent distributed state.

C:

Idempotency protects business state when network requests repeat.

Incorrect Answers

B:

Error contracts are part of integration correctness.

D:

Real network boundaries may differ from mocks.

E:

Happy paths cannot validate failure recovery.

Question 406

A generated sorting function appears correct for a simple list. What edge case should be included?

  1. Use property-based or fuzz testing with invariant assertions.
  2. Test empty, duplicate-key, already sorted, and reverse-sorted inputs.
  3. Probe memory, runtime growth, and algorithmic limits on scaled inputs.
  4. Test timezone transitions and ambiguous or nonexistent local times.

Explanation

Correct Answer

B:

Ordering bugs often surface at boundaries and ties.

Incorrect Answers

A:

Broad generated inputs explore unexpected cases beyond handpicked examples. What edge case should be included. Ordering bugs often surface at boundaries and ties.

C:

Correct small-input results do not establish scalability. Ordering bugs often surface at boundaries and ties.

D:

Clock rules create boundary conditions that simple timestamps miss. ordering bugs often surface at boundaries and ties.

Question 407

A validator handles ASCII letters but not emojis or combining marks. What should be tested?

  1. Probe memory, runtime growth, and algorithmic limits on scaled inputs.
  2. Test empty, duplicate-key, already sorted, and reverse-sorted inputs.
  3. Include Unicode normalization and multicodepoint grapheme inputs.
  4. Test timezone transitions and ambiguous or nonexistent local times.

Explanation

Correct Answer

C:

Text length and character classes vary beyond ASCII.

Incorrect Answers

A:

Correct small-input results do not establish scalability. Text length and character classes vary beyond ASCII.

B:

Ordering bugs often surface at boundaries and ties. text length and character classes vary beyond ASCII.

D:

Clock rules create boundary conditions that simple timestamps miss. text length and character classes vary beyond ASCII.

Question 408

A parser claims it never crashes on any string. What verification technique can help?

  1. Use property-based or fuzz testing with invariant assertions.
  2. Include Unicode normalization and multicodepoint grapheme inputs.
  3. Test empty, duplicate-key, already sorted, and reverse-sorted inputs.
  4. Probe memory, runtime growth, and algorithmic limits on scaled inputs.

Explanation

Correct Answer

A:

Broad generated inputs explore unexpected cases beyond handpicked examples.

Incorrect Answers

B:

Text length and character classes vary beyond ASCII. What verification technique can help. Broad generated inputs explore unexpected cases beyond handpicked examples.

C:

Ordering bugs often surface at boundaries and ties. broad generated inputs explore unexpected cases beyond handpicked examples.

D:

Correct small-input results do not establish scalability. Broad generated inputs explore unexpected cases beyond handpicked examples.

Question 409

A date formatter works near noon but fails at daylight-saving transitions. What should be added?

  1. Use property-based or fuzz testing with invariant assertions.
  2. Include Unicode normalization and multicodepoint grapheme inputs.
  3. Test timezone transitions and ambiguous or nonexistent local times.
  4. Test empty, duplicate-key, already sorted, and reverse-sorted inputs.

Explanation

Correct Answer

C:

Clock rules create boundary conditions that simple timestamps miss.

Incorrect Answers

A:

Broad generated inputs explore unexpected cases beyond handpicked examples. clock rules create boundary conditions that simple timestamps miss.

B:

Text length and character classes vary beyond ASCII. What should be added. Clock rules create boundary conditions that simple timestamps miss.

D:

Ordering bugs often surface at boundaries and ties. clock rules create boundary conditions that simple timestamps miss.

Question 410

A sequence algorithm fails on extremely large lists. What should the test plan examine?

  1. Use property-based or fuzz testing with invariant assertions.
  2. Include Unicode normalization and multicodepoint grapheme inputs.
  3. Probe memory, runtime growth, and algorithmic limits on scaled inputs.
  4. Test timezone transitions and ambiguous or nonexistent local times.

Explanation

Correct Answer

C:

Correct small-input results do not establish scalability.

Incorrect Answers

A:

Broad generated inputs explore unexpected cases beyond handpicked examples. correct small-input results do not establish scalability.

B:

Text length and character classes vary beyond ASCII. What should the test plan examine. Correct small-input results do not establish scalability.

D:

Clock rules create boundary conditions that simple timestamps miss. Correct small-input results do not establish scalability.

GitHub Copilot (GH-300) Practice Tests