I passed the online coding challenge and two technical interviews.

Then, a short final phone call was scheduled with the hiring manager before we could proceed to the offer stage. However, I was rejected before even having this call due to apparent miscommunication between the team I interviewed with and the manager.

The recruiter was nice, so I was set up with a different team and had a 20-minute call with that hiring manager, which he was 15 minutes late to. I waited weeks until I was rejected again.

The recruiter then set me up with another team, and at this point, I was required to do another technical round of interviews. It went fairly well, but I ended up rejected once again.

To sum up, I was strung along through interviews for about three months and ended up with nothing.

1. Print out a DFS traversal of a tree using BFS.

2. Serialize and reconstruct a tree.

3. Replace underscores of all keys in a dictionary with a $. The dictionary also had lists of dictionaries.