It is my April 28, 2018 6:00 PM mock interview. I had to write the algorithm called Merging 2 packages. I also met a peer who works in Silicon Valley, and he asked me where I practice the algorithm, so I wrote down a few places I practiced.
Here is my C# code and also a few lines of notes to share my experience. The peer also shared system design link and he strongly recommended it to me.