Deep dives into System Design, Object-Oriented Programming, and scalable architecture.
Master the difference between HLD and LLD. Learn when to use each, their key components, and how they work together in system design interviews.
Learn to read and draw UML class diagrams for LLD interviews. Covers notation, relationships, sequence diagrams, and a complete worked example.
![Top 20 Low Level Design Interview Questions [2026 Guide]](/images/blog/low-level-design-interview-questions-thumbnail.png)
The most commonly asked Low Level Design (LLD) interview questions at top tech companies, organized by difficulty. Includes key concepts tested, approach hints, and company patterns.
Ace the machine coding round used by Flipkart, Uber, Swiggy, and Cred. Covers the 90-minute framework, evaluation criteria, and top 10 practice problems.
A practical guide to OOP concepts that matter. Covers the 4 pillars, class relationships, encapsulation vs abstraction, inheritance vs composition.
Master the 5 SOLID design principles through visual before/after comparisons and real-world analogies. No code — just clear diagrams, interactive visuals, and practical understanding.
Learn what Low Level Design (LLD) is, why it matters, and how to master it. Covers the 7 key components of LLD, a complete worked example, common mistakes, and a step-by-step learning roadmap.
Discover the truth about microservices architecture - the benefits, hidden costs, and most importantly, when you actually need them. A practical guide for developers and architects.