Category
interview
4 articles in this category
Webhooks Explained: Don't Call Us, We'll Call You
TLDR: Polling is like asking "Are we there yet?" every 5 seconds. Webhooks are like the driver tapping you on the shoulder when you arrive. They allow systems to communicate in real-time by sending HTTP POST requests when an event occurs, saving reso...
Tree Data Structure Explained: Concepts, Implementation, and Interview Guide
TLDR: Unlike linear data structures (Arrays, Linked Lists) which are like a straight line, Trees are hierarchical. They model relationships like "Parent-Child" or "Folder-File." This guide covers the terminology, real-world uses, and how to implement...
Mastering Binary Tree Traversal: A Beginner's Guide
TLDR: Trees are non-linear, meaning there isn't just one way to read them. "Traversal" is simply the specific order in which you visit every node. This guide breaks down the four essential strategies—Preorder, Inorder, Postorder, and Level Order—usin...
The Ultimate Guide to Acing the System Design Interview
TLDR: System Design interviews aren't about finding the "right" answer; they are about demonstrating your ability to navigate trade-offs. This guide is a comprehensive glossary and framework covering the essential theory—from Load Balancing and Cachi...