The recruiter was very helpful initially.

There are some strange interviewers, so please be careful.

If you know any questions in advance, they will try to stump you with a hard question. I encountered an interviewer like that.

When I answered his first question, his face went pale. He told me that some people get to know the questions in advance and that he wanted to stump me with a hard question, haha.

I guess his day was bad.

I strongly recommend not applying to Google unless you know exactly what you are going to work on.

Some questions were common, like:

• Serialize and deserialize strings (Big O).
• On a grid, find the minimal meeting point for different people.
• Given an m/n matrix (m, n are variable, m*n > 26) filled with letters from A to Z, write a program to navigate from one letter to another using <, >, ^, v. The output should print the path from one letter to another. Handle boundary conditions, etc.

Some questions were on constraint-based algorithms in strings, and memoization.