Welcome to your interview.
The question is on your right: Aggregate Error Rates From Logs. 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 list of log entries, write a script to parse, filter, and aggregate the error rates by service name within a specific timeframe.