I interviewed through the Grow With Fast Program, which was a 10-week program in the Fall with weekly 1-hour meetings going over life at Fast, resume help, and interview prep. You also have to submit an OOP project that you have done through coursework or a personal project at the end of the program. This program got me a guaranteed interview for a summer internship. The interview was 1 hour long, first 20 minutes were behavioral questions, the basic why do you want to work here or tell me about a time when. The next 30 minutes were a very easy technical question, which you wrote a pseudocode solution to. The last 10 minutes are logistical questions and your questions for the interviewers.

Only 1 Teams interview, first part was "technical" which was write a program to find first 100 primes. Then write another program to determine if a number is prime or not. Study that and you are good for the interview, no need for Leetcode. Second part was behavior, I was asked about myself, what I know about Fast, and if I'd relocate. I was also asked to describe how a credit card works to a 2nd grader. The interviewers were ok, it felt very corporate as opposed to a conversation. But it was still easy and wouldn't stress over it.