2d ago 路 6 min read 路 In today's article we will discuss about why failing services can crash your entire system and what we can do to prevent it. First, What is considered failing service? A service does not need to compl
Join discussionMar 9 路 25 min read 路 TLDR TLDR: A Movie Booking System (like BookMyShow) is an inventory management problem with an expiry: seats expire when the show starts. The core engineering challenge is preventing double-booking under concurrent user load with a 3-state seat mode...
Join discussionMar 9 路 18 min read 路 TLDR TLDR: A Parking Lot is the "Hello World" of Low-Level Design. It teaches Encapsulation (ParkingFloor hides its Min-Heap), Abstraction (PricingStrategy interface), Inheritance (BikeSpot/CompactSpot/LargeSpot extend ParkingSpot), and Polymorphism...
Join discussionMar 9 路 21 min read 路 TLDR TLDR: An elevator system is a textbook OOP design exercise: ElevatorCar encapsulates its stop queue, ElevatorState polymorphically handles direction changes (State Pattern), and DispatchStrategy keeps assignment algorithms swappable (Strategy P...
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Mar 9 路 21 min read 路 TLDR TLDR: A URL Shortener maps long URLs to short IDs. The core challenge is generating a globally unique, short, collision-free ID at scale. We use Base62 encoding on auto-incrementing database IDs for deterministic, collision-free short codes. ...
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