Dev.to
6/20/2026

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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