Mon - Sat 9.00 - 19.00. Sunday CLOSED 
Welcome to Part 15 of the JavaScript Machine Coding Interview Questions series! In this session, we’ll take Question 11 to the Advanced Level — focusing on writing optimized, scalable, and production-ready solutions. Unlike the beginner version, here we’ll enhance performance, handle edge cases, and implement best practices that are expected in real interview scenarios.
✅ What You’ll Learn in This Video:
✔️ How to optimize a beginner-level coding solution for efficiency
✔️ Using advanced JavaScript methods like reduce(), map(), Set, or Map
✔️ Handling edge cases and invalid inputs gracefully
✔️ Writing reusable and modular functions
✔️ Demonstrating time and space complexity improvements
💡 Why This Step Matters:
🔹 Shows interviewers you can go beyond the basic solution
🔹 Demonstrates critical thinking and performance awareness
🔹 Prepares you for system design–oriented questions where efficiency matters
🔹 Bridges the gap between simple coding challenges and real-world production code
