Google Search Lab
Autocomplete, search ranking, inverted index, prefix search
Walkthrough
How Google Search Works
Step-by-step from query to results
User Types a Query
A user types a search query into the search bar. Each keystroke triggers autocomplete suggestions powered by a Trie data structure for O(L) prefix lookup.
3D Experimental Workflow
Interactive 3D visualization of Google Search infrastructure and Trie autocomplete
Loading 3D scene...
Orbit
Drag to rotate, scroll to zoom
Auto-Rotate
Scene auto-rotates for full view
Live Data Flow
Animated particles show query routing
Coding Challenge
Practice on Terminal
Write and submit your solution, then check achievements
Design an autocomplete system that suggests the top K most frequent words matching a given prefix. Given an array of words and their frequencies, return up to K suggestions for any prefix, sorted by frequency (descending) then alphabetically.