Question Design a distributed web crawler that discovers URLs, fetches pages politely, stores content, and keeps the frontier fresh.
Consider
URL frontier and deduplication Politeness / per-host rate limits DNS and fetch workers Content storage Freshness and recrawl Handling traps and duplicates
select rect note arrow text clear
Play Pause Stop
Loading free system voices…
Loading free system voices…
Visual Session
Voice Camera Screen Camera + Screen Interactive Coding Presentation
Start a visual session — camera and screen are off until you choose a mode above.
🎤 Mic ⏺ Record
Camera and screen are only active with your permission. Frames are sampled periodically — not sent continuously.
Stopped — press Play to start
🎙 Done
Finish