Referred by an employee, directly onsite, no phone interview.

There were 4 rounds, all technical problems, mostly algorithm and data structure. A few fundamental CS questions and resume questions were asked.

All the coding problems were pretty new, and I had met similar ones in my previous coding exercises.

The questions were more flexible than at other companies:

1. Design a data structure representing HTML (general tree design)
2. Scalable matrix
3. Math problem
4. Regular expression matching

Design a data structure representing HTML (general tree design).

Scalable matrix.