CCARF Practice Question

Paper 5 · Question 19

D4 Prompt Engineering & Structured Output · Paper 5

[Scenario: Claude Code for Continuous Integration] Your automated review generates test-case suggestions for each PR. Reviewing a PR that adds course completion tracking, Claude suggests 10 test cases, but developer feedback shows that 6 duplicate scenarios already covered by the existing test suite. What change most effectively reduces duplicate suggestions? What change is most effective?

• A.Include the existing test file in context so Claude can determine what scenarios are already covered.
• B.Reduce the requested number of suggestions from 10 to 5, assuming Claude prioritizes the most valuable cases first.
• C.Add instructions directing Claude to focus exclusively on edge cases and error conditions rather than success paths.
• D.Implement post-processing that filters suggestions whose descriptions match existing test names via keyword overlap.

Show answer & explanations

Correct answer: A

A: Including the existing test file fixes the root cause of duplication: Claude can only avoid suggesting already-covered scenarios if it knows what tests already exist. This gives Claude the information needed to propose genuinely new, valuable tests.

B: Asking for fewer tests does not show which scenarios already exist. The duplicates just get shorter.

C: Restricting the ask to edge cases still overlaps edge-case tests that are already in the file.

D: Keyword overlap on test names drops a reworded duplicate and keeps one whose name does not match.

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