Mixed check
82 questions across 17 topics, drawn in an order that never puts two from the same topic together. You are not told which topic a question belongs to until you have answered it.
A single-topic quiz tells you the answer is about DCFs before you read the question, because you are on the DCF page. An interviewer does not. Practising the choice of framework, and not only its execution, is the difference.
Mixed check
Questions drawn across topics and shuffled, with the topic hidden until you answer. Working out what kind of question it is comes first, which is the part a single-topic quiz never asks you to do, and the part an interview always does.
Draw from
Questions
82 questions in this pool. Nothing is stored anywhere but this browser.
Best used a day or two after a reel rather than straight after it. Coming back cold is what makes the retrieval worth something.