Walmart Low Level Design Interview Questions

Walmart has 3 rounds of interviews DSA, LLD, HLD. 2nd or 3rd round is LLD. In some cases there are two DSA rounds or DSA round + round with lots of small questions including LLD, springboot, concurren

Walmart has 3 rounds of interviews DSA, LLD, HLD. 2nd or 3rd round is LLD. In some cases there are two DSA rounds or DSA round + round with lots of small questions including LLD, springboot, concurrency, java etc. After you give a LLD solution HLD discussion also happen like database schema, scaling etc. For Software engineer 3 roles any given round it is more of LLD solution followed with some basic HLD discussion. It also includes concurrency, locking discussions. In LLD, clear explanation of design choices mattered more than just coding. --------------------------------------------------- Also for Walmart observer design pattern occurred most frequently (directly or indirectly) in LLD questions and in short discussions. So if you have good understanding of observer pattern(which is easy) then your chances improve. Not only they ask LLD problems but there may even be explicit discussion about common design patterns and how you will solve some sample use cases using those design patterns. Observer, Strategy, factory, command and singleton design pattern feature frequently in discussions. For example, a common discussion is how will you implement a notification system using observer or different payment methods in a payment gateway using strategy design pattern. This blog has some of the design patterns and how they are used to solve different usecases <a href="https://medium.com/@prashant558908/4-most-common-design-patterns-that-are-essential-to-solve-low-level-design-interview-questions-b7196c8c2b8b-