Welcome to your interview.
The question is on your right: Data Cleaning and Rolling DAU. 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 dataset of user pin interactions, write a Python Pandas script to clean the data, handle missing values, and calculate the rolling 7-day active user count.