The interview process started with the recruiter contacting me to schedule a phone screen with the hiring manager. I suggested a few times when I would be available for a phone screen.

The phone screen lasted for about 30 minutes. The hiring manager asked questions about my background and experience, and just a couple of C++ questions. He mentioned he would leave the opportunity to ask more technical questions for the in-person interview.

Next, a 4-hour on-site interview was scheduled with 4 people in a one-on-one setting.

Given two tiles, 1x2 and 2x1, how many ways are there to tile an nx2 floor? Solve this on the whiteboard in C++.

Write a function that determines if a tree is a BST or not.