How to Prevent Duplicate Booking | System Design FAANG Interview | Redis Distributed Locks Explained

🚀 Learn how to prevent duplicate booking in system design interviews — one of the most asked questions at top tech companies like Tesco, Amazon, Google, and Meta. This video covers the COMPLETE solution senior engineers need to know: ✅ Why duplicate booking happens (concurrency problem explained) ✅ Database unique constraints (your safety net) ✅ Redis distributed locking with NX and EX flags (production-grade solution) ✅ Row-level locking with SELECT FOR UPDATE ✅ The best real-world approach (combined Redis + DB strategy) ✅ Word-for-word interview answer that impresses hiring managers 🎯 Perfect for: - Senior Software Engineer interviews - Backend Engineer technical rounds - System Design interview preparation - Anyone building booking systems, ticket platforms, or reservation apps 🔑 KEY CONCEPTS COVERED: #SystemDesign #Redis #DistributedLocking #Concurrency #DatabaseDesign #InterviewPrep 💬 QUESTIONS FOR YOU: What company are you interviewing with? Drop it in the comments and I'll cover their favorite system design questions next! 🔔 SUBSCRIBE for weekly system design interview prep content 👍 LIKE if this helped you understand duplicate booking prevention 📢 SHARE with engineers preparing for technical interviews 📖 Resources mentioned: - Redis Documentation: https://redis.io/docs/ #SystemDesignInterview #SoftwareEngineering #TechInterviews #Redis #BackendDevelopment #CodingInterview #SeniorEngineer #Tesco #FAANG #DistributedSystems #Concurrency #DatabaseDesign #TechCareer #InterviewTips #softwaredeveloper