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Dev.to
Dev.to
6/20/2026
Building a CompTIA practice-test engine that gives students source-verified questions

Building a CompTIA practice-test engine that gives students source-verified questions

Short summary

A developer built a CompTIA practice-test engine enforcing a hard guarantee: every answer traces back to a verified source, not recycled exam dumps. The system uses adversarial verification and CI gates to automatically reject low-confidence questions, intentionally over-cutting to avoid teaching students wrong answers. The tool is live and free, prioritizing learner success over generation efficiency.

  • Built a practice-test tool with receipt-based source verification for every answer
  • Uses adversarial verifier and CI gates to enforce correctness; intentionally over-cuts low-confidence questions
  • Demonstrates asymmetric failure-mode thinking: wrong answer to student is worse than dropping a good question

Generated with AI, which can make mistakes.

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