Interview Simulator · System Design
Design Search Autocomplete
A full 45 minute round, one phase at a time. Each phase has a time budget, follow-up questions from the interviewer, and a checklist for your level. Reveal a phase's model answer whenever you need it; the report shows which phases you earned.
Design search autocomplete. People run about 1 billion searches a day, and the search box asks for suggestions on about 5 keystrokes per search. The top completions for a prefix have to come back in under 100 ms at p99, anywhere in the world.