After passing the phone interview, I received an opportunity for an on-site interview. I completed two rounds of the on-site interview.

I likely received negative feedback after the first round, and the second one was a casual talk.

For coding problems, they expected bug-free code, so practicing well is very important. Merely knowing the basic idea is not enough.

Phone: Remove duplicated words from a string.

Onsite:

1. How to avoid deadlock for multithread programming.
2. How to get max profit during stock transactions.
3. Overriding operators for complex number calculating (C++).