The question is quite hard, more so than one might expect from the company. The hiring process is terrible, with very poor planning from HR management. My interviews were canceled multiple times due to "last-minute meetings," which seem to happen quite regularly.

It started with a phone interview, which was canceled. Instead of the phone interview, I received a link to a problem that allowed 90 minutes to solve. Afterward was a Skype (algorithms) interview. The questions were similar to others posted here.

Then came an on-site interview, which was located in London.

No *hole policy? It seems like this is a great deal for them. But aren't you one if you have such a policy?