5 min read Stack Interview Patterns: Parentheses, Calculator, Histogram & More Beyond the monotonic stack, there are several classic stack patterns that appear […] Read article
4 min read Advanced Binary Search Interview Patterns Binary search goes far beyond searching a sorted array. The key insight: whenever you can Read article
4 min read System Design: Design a Key-Value Store (like Redis or DynamoDB) A key-value store is the simplest and most widely-used NoSQL Read article
4 min read Two Pointers and Sliding Window Interview Patterns Two-pointer techniques transform O(n²) brute-force solutions into O(n) elegant ones. They are among Read article
5 min read Trie Data Structure Interview Patterns: Autocomplete, Word Search & Prefix Problems A Trie (prefix tree) is the go-to data structure Read article
5 min read Graph Algorithms Interview Patterns: BFS, DFS, Dijkstra & More Graph problems appear in roughly 25% of FAANG algorithm interviews. Mastering Read article
4 min read System Design: Load Balancer — How to Design Traffic Distribution at Scale Load balancers are one of the most fundamental Read article
8 min read String dynamic programming problems — longest common subsequence, edit distance, palindromic subsequences — appear frequently in senior engineering interviews. These Read article
7 min read Designing a file storage and sync service like Dropbox combines chunked file storage, delta sync, conflict resolution, and offline-first architecture. Read article
7 min read Designing a hotel or home-sharing booking system like Airbnb is a comprehensive system design problem that combines availability calendars, concurrent Read article
5 min read Designing a social media feed like Twitter is one of the most comprehensive system design problems. The core challenge: how Read article
7 min read Knapsack problems are the most important dynamic programming pattern class. Mastering 0/1 knapsack, unbounded knapsack, and their variants (subset sum, Read article
7 min read Designing a video streaming platform like Netflix or YouTube is one of the most comprehensive system design challenges, combining video Read article
6 min read Designing a transactional email service (like SendGrid or AWS SES) or an email client (like Gmail) involves deep distributed systems Read article
6 min read Designing an autocomplete (typeahead) service is one of the most common system design interview questions, frequently asked at Google, Meta, Read article
