Practice and Timed modes
Two modes, two jobs. Practice teaches while you answer; Timed measures whether the teaching took. Most people need both, in that order.
Practice
No clock. After each answer you get the reasoning — why the right option is right and, just as important, why the tempting wrong one is wrong. Use it while the material is still new.
Timed
A clock and no help, in a block short enough to repeat daily. This is the mode that tells you whether you know something or merely recognise it.
Scoring is all-or-nothing
A question counts as right only when every correct option is selected and no incorrect one is. There is no partial credit, because the exam does not give it either.
Where the questions come from
Each one is built from a trap recorded in a lesson — a misconception students actually hold. The wrong answers are real mistakes rather than filler, which is why they are harder to dismiss than the options on a generic question bank.
A score that looks wrong is nearly always a multi-select question where one correct option was missed. The review screen marks exactly which.
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