You need to process a 20 GB log file: filter the lines and compute some aggregates over them. How would you write that in Python?
~4 min by voice
How to approach it
This checks whether the candidate understands stream processing in Python: the laziness of iterators and generators, why memory shouldn't depend on file size, and whether they can aggregate on the fly and parallelize when needed.
The interviewer will ask this question and listen. Think out loud and ask for a hint if you need one. When you're done, pause or tap “That's my answer”. In about a minute, your score and the points you covered show up here.