5 min read What Is an Inventory Management System? An inventory management system tracks stock levels across warehouses, prevents overselling, coordinates replenishment, and […] Read article
6 min read Shortest Path Algorithms in Interviews Shortest path problems ask: given a graph with weighted or unweighted edges, what is the Read article
6 min read What Is a Real-Time Collaborative Whiteboard? A collaborative whiteboard (like Miro, FigJam, or Excalidraw) lets multiple users simultaneously draw, add Read article
6 min read What Is a Healthcare Appointment Booking System? A healthcare appointment booking system allows patients to schedule, reschedule, and cancel appointments Read article
5 min read What Is a Distributed Lock? A distributed lock ensures that only one node in a cluster executes a critical section Read article
4 min read What Is a Loyalty and Rewards System? A loyalty program tracks user activity and awards points redeemable for discounts or Read article
5 min read What Is an Ad Click Aggregation System? Ad platforms (Google Ads, Meta Ads, Amazon Advertising) must aggregate billions of ad Read article
6 min read Advanced Dynamic Programming Patterns Beyond the foundational DP patterns (Fibonacci, 0/1 knapsack, LCS), advanced interviews test state machine DP, interval Read article
5 min read What Is a Typeahead / Search Suggestion System? A typeahead (also called autocomplete or search suggestion) system predicts what a Read article
6 min read String Algorithm Patterns in Interviews String problems are ubiquitous in coding interviews. Most string challenges reduce to a small set Read article
6 min read What Is a Distributed Message Queue? A message queue decouples producers (services that generate work) from consumers (services that process Read article
6 min read What Is a Live Sports Score System? A live sports score system delivers real-time score updates to millions of concurrent Read article
6 min read What Is a Cloud File Storage System? A cloud file storage system lets users upload, sync, and share files across Read article
5 min read What Is an Online Auction System? An online auction system allows sellers to list items and buyers to place competitive Read article
6 min read What Is Union-Find? Union-Find (Disjoint Set Union, DSU) is a data structure that tracks a collection of elements partitioned into Read article
