Mock exam
Same rules as the hall.
Select an option — nothing is marked yet. Hit Submit to lock it. Right or wrong, the explanation is shown before you move on. The official paper is 120 questions in three hours. If you leave, the attempt stays on this device until you continue or discard it.
Full paper
120 questions
The entire practice exam, in official order, with the published keys.
Quick set
20 random
A shuffled slice across all eight elements. Same submit-then-explain flow.