System Design Interview

System Design interviews test how well you can design scalable, reliable, and maintainable applications. This section covers important concepts such as scalability, load balancing, caching, databases, messaging, consistency, partitioning, high availability, and fault tolerance. You’ll also find common interview problems such as designing rate limiters, payment systems, notification systems, URL shorteners, and other large-scale applications. Each topic focuses on understanding the trade-offs behind different architectural decisions. The goal is to help you explain your design clearly and confidently during interviews.