Set the scene
Choose mock, name the role, and decide whether notes are saved. The first pass can be a reread of a published question.
Mock interviews
Rehearse one question until the tradeoff is short.
A mock on Prep Desk is a session you start. The desk holds the role, the current question, and the answer you are practicing. It is not a silent overlay for a proctored test.
Open a practice sessionStay on one question
A follow-up such as “what happens if the cache is down?” belongs to the rate-limiter question. It should not start a second, unrelated answer.
Review in your words
After the mock, open the published page and mark it practiced only when you can give the answer without reading it.
A sample prompt
Question
How would you design a rate limiter for a public API?
Answer to practice
Name the key, the algorithm, the 429, and what you do when the counter store is down.
Open the full note