8 min read Designing a ride-sharing application like Uber or Lyft is one of the most comprehensive system design questions. It combines real-time […] Read article
7 min read A web crawler systematically browses the internet to download web pages for indexing, archiving, or data extraction. Google, Bing, and Read article
6 min read Rate limiting protects APIs from abuse, prevents resource exhaustion, and ensures fair usage across clients. Designing a rate limiter is Read article
7 min read Two pointers and sliding window are among the most powerful techniques for solving array and string problems efficiently. They reduce Read article
8 min read Tree problems are the most common category in coding interviews, appearing in approximately 25% of questions at top tech companies. Read article
7 min read Design a URL shortener is the most frequently asked system design interview question. It appears simple but covers core system Read article
7 min read Database replication copies data across multiple servers to achieve high availability, fault tolerance, and read scalability. Understanding replication strategies — Read article
7 min read Infrastructure as Code (IaC) manages cloud infrastructure through declarative configuration files rather than manual console clicks. IaC enables version control, Read article
8 min read A notification system delivers timely information to users through multiple channels — push notifications, email, SMS, and in-app messages. Companies Read article
7 min read Multi-region architecture distributes your application across multiple geographic regions to achieve low latency for global users, high availability during regional Read article
7 min read Data serialization determines how structured data is encoded for storage and transmission. The choice between JSON, Protocol Buffers, Avro, and Read article
6 min read Capacity planning and back-of-envelope estimation are essential skills for system design interviews. Every design decision — whether to use a Read article
8 min read Full-text search is a core feature of most applications — from e-commerce product search to log analysis to knowledge base Read article
8 min read Concurrency questions test your understanding of parallel execution, synchronization, and the subtle bugs that arise when multiple threads share state. Read article
8 min read Continuous Integration and Continuous Delivery (CI/CD) pipelines automate the path from code commit to production deployment. A well-designed CI/CD pipeline Read article
