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
6 min read As machine learning moves from research to production, companies need platforms that manage the full ML lifecycle: data ingestion, feature Read article
7 min read Designing a ticketing system like Ticketmaster or a seat reservation system for movies/concerts tests your understanding of concurrency, distributed locking, Read article
6 min read API gateways and service meshes are the networking backbone of modern microservices architectures. They handle cross-cutting concerns — authentication, rate Read article
6 min read DNS and global load balancing are foundational to any internet-scale system. Understanding how DNS resolution works, how GeoDNS routes traffic, Read article
5 min read Kubernetes is the de facto standard for container orchestration. Understanding its architecture, scheduling model, and operational patterns is increasingly expected Read article
7 min read Sliding window and two pointer techniques are among the most frequently tested patterns in coding interviews. They convert O(n²) or Read article
5 min read Maintaining data consistency across multiple microservices is one of the hardest distributed systems problems. Two-phase commit (2PC) ensures ACID guarantees Read article
5 min read Designing a distributed file system (DFS) like HDFS, Google File System, or Amazon S3 is a classic system design interview Read article
5 min read Recommendation systems power product discovery at Netflix, Spotify, Amazon, and LinkedIn. Designing one at scale involves a multi-stage architecture that Read article
8 min read Tries (prefix trees) and string algorithms appear in autocomplete, spell checking, IP routing, and competitive programming. Mastering trie construction and Read article
10 min read The global programmatic advertising market is $500B. Every time a web page loads, a real-time auction runs in under 100 Read article
