X Software Engineering interview questions

Began with two online pre-interviews, at which point I had a phone interview with the question mentioned below. After that they contact you back, and you do a two-part interview with whatever team they would end up assigning you to. The interview itself didn't seem like it should have gotten hard until you got matched to a particular team.

I had a short call with HR where I was asked which areas I am interested in. From there I had four skype interviews. The timeline was always communicated well with me.