In LLD interviews, writing code that works is only half the battle. What truly sets strong candidates apart is their ability to write clean, structured, and maintainable code that reflects real-world engineering practices.

You are not just evaluated on whether your solution solves the problem. You are also judged on how you organize classes, define responsibilities, manage dependencies, name things, handle edge cases, and communicate your design through code.

Clean code makes your design easier to understand, extend, test, and discuss. In this chapter, you will learn the principles, practices, and mindset needed to write clean code in LLD interviews.