Had two rounds of phone interviews with two different engineers.

The first round was great; it was collaborative, and constant feedback was given. I was able to solve two problems very well in the first round and cleared it.

In the second round, I was asked two questions. I answered the first question smoothly. The second question was a little tricky, but there was no help from the other end. The interviewer was quiet the entire time and not encouraging.

Find the unique characters in a string.

Given a list of flight paths (e.g., A<->B, A<->C, B<->D), print all possible flight paths starting from each point. For example, A - B - D - B - A, etc.

Given a list of words, find if the odd/even character split of that word exists in the list.