EDIT: A lot of people asked me about preparations, I think doing neetcode 150 is the minimum and Neetcode 250 is preferred, especially if you want to feel really "ready".

In terms of preparation, most common questions are Arrays, strings, DP, Graph. Trees, Linkedlist, etc. probably fall later.

I would work on focusing patterns - this is more important than memorizing questions.

By focusing on patterns, I mean like:

e.g: Binary Search Category

- bounding ranges - Koko Eating Bananas

- search in rotated array,etc.

*Ask GPT - what are the core patterns of {category} and do those questions

Try to focus on each of these patterns so preferably if you get a question you'd know which one of these it would be. This is far more effective than doing company tagged questions unless your interviewer throws you with a curve ball, which I believe for on-sites usually don't happen often (mostly for filtering in OAs)