If you've ever studied for a CompTIA exam with free practice questions online, you already know the problem: most "practice tests" are recycled exam dumps. The same leaked pool, copy-pasted across a dozen sites, with a worrying number of "correct" answers that are subtly wrong and no indication of where any of it came from.
For a student, that's worse than useless. You can memorize a wrong answer with total confidence and walk into the exam having actively trained the mistake.
I wanted to build a practice-test engine that made the opposite promise to students: every answer you see can be traced back to a primary source. Not "I checked most of them." Not "a reviewer will probably catch the bad ones." A hard guarantee, enforced by code. This post is how I turned that promise into an actual pipeline — and what it cost.
The guarantee, stated as a rule
The whole engine is built around one deliberately unreasonable constraint:
