Two easy data structure and algorithm hacker rank questions. The interviewer let me do them in any language I wanted to so I chose Python. I struggled on one of them but he gave me some help and I got through it. The interview was 30 minutes and he gave me 2 roughly 15 minute questions.

General coding assessment questions on Hackerrank. Spent a couple hours each day for a week preparing, then spent a couple hours taking their assessment. Did pretty well. Never heard back from the company about whether I passed or not. I thought it was very unprofessional for them to ghost a candidate who spent several hours preparing and taking their test, showing interest in working for their company.