Welcome to your interview.
The question is on your right: Detect Distributed Brute Force. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
Given a raw log file containing millions of requests, how would you write a script to identify a distributed brute-force attack on the driver login endpoint for Uber Drivers?