I recently went through a three-round interview process.

The first round focused on LeetCode hard-level problems and also tested computer systems knowledge, including OS, networking, and Linux internals.

The second round involved a file processing task, where I had to write efficient code to handle and transform structured data.

The third round was a behavioral interview, centered around past projects, communication skills, and how I handle challenges.

Across all rounds, strong preparation in computer science fundamentals—data structures, algorithms, and systems—was essential.

LeetCode hard tree traversal question.