The process was really smooth.

I talked to a recruiter at a university career fair and got a phone interview (Hackerrank) afterwards with two questions.

A few weeks later, I received an onsite offer. They fly you out and pay for your hotel, etc.

The onsite interview involved two 2-on-1 technical interviews with engineers. In mine, they switched off asking questions, and we probably got through two to three questions each time.

Then there was a shorter interview with a group manager, who gave a more open-ended design question, followed by a brief "why Bloomberg" type thing with HR.

Find common parents in a binary tree.