Trie Interview Patterns: Autocomplete, Word Search, and Prefix Problems (2025)
Trie Interview Patterns: Autocomplete, Word Search, and Prefix Problems (2025) Tries (prefix trees) are the go-to data structure for string […]
Algorithms
System Design
System Design Interview: How DNS Works and How to Design It
System Design Interview: How DNS Works and How to Design It Understanding DNS (Domain Name System) is fundamental to backend
System Design
System Design Interview: Design a Pastebin / Code Snippet Service
System Design Interview: Design a Pastebin / Code Snippet Service Designing Pastebin is a classic beginner-to-intermediate system design question that
System Design
System Design Fundamentals: CAP Theorem, Consistency, and Replication
System Design Fundamentals: CAP Theorem, Consistency, and Availability Understanding distributed systems fundamentals is essential for any system design interview. These
System Design
System Design Interview: Design a Real-Time Leaderboard (Top-K System)
System Design Interview: Design a Real-Time Leaderboard (Top-K System) Real-time leaderboards rank users by score and are common in gaming,
System Design
System Design Interview: Distributed Transactions (2PC, Saga Pattern)
System Design Interview: Distributed Transactions (2PC, Saga Pattern) Distributed transactions are one of the hardest problems in distributed systems. When
System Design
System Design Interview: Design an Email System (Gmail)
System Design Interview: Design an Email System (like Gmail) Designing an email system covers distributed storage, message queuing, full-text search,
Algorithms
2D Dynamic Programming Interview Patterns (2025)
2D Dynamic Programming Interview Patterns (2025) Two-dimensional DP problems are common at Google, Meta, Amazon, and Microsoft. They involve grids,
System Design
System Design Interview: Design a Maps and Navigation System (Google Maps)
System Design Interview: Design a Maps and Navigation System (Google Maps) Designing a maps and navigation system is asked at
Algorithms
Object-Oriented Design Patterns for Coding Interviews
Object-Oriented Design Patterns for Coding Interviews Design pattern questions test whether you can structure code for maintainability and extensibility. Common
System Design
System Design Interview: Design a Feature Flag System
System Design Interview: Design a Feature Flag System Feature flag (feature toggle) systems allow engineers to enable or disable features
System Design
System Design Interview: Design a Live Streaming Platform (Twitch)
System Design Interview: Design a Live Streaming Platform (Twitch) Designing a live streaming platform like Twitch differs significantly from on-demand
System Design
System Design Interview: Design a Video Streaming Platform (YouTube/Netflix)
System Design Interview: Design a Video Streaming Platform (YouTube/Netflix) Designing a video streaming platform like YouTube or Netflix is a
System Design
System Design Interview: Design a Ticketing System (Ticketmaster)
System Design Interview: Design a Ticketing System (like Ticketmaster) Designing a ticket booking system like Ticketmaster tests your ability to
System Design
System Design Interview: Design a Search Engine (Elasticsearch)
System Design Interview: Design a Search Engine Designing a search engine tests your understanding of inverted indexes, relevance ranking, distributed