In my first phone screen interview, I got nervous because they contacted me on my cell phone. However, I had told them that my cell phone was unstable and I preferred a landline. I was asked one question, and my code had many bugs. The whole time, I was trying to find my bugs.

During the second interview, I was asked to describe my biggest project, followed by two algorithm questions. They were very easy but tricky.

You are given an integer. Count its 1 bits in its binary representation.