Time window anomaly detection
A list of transactions (card number, country, time) arrives sorted by time ascending. What's the most efficient way to detect "the same card used in two different countries within 5 minutes"?
Pick one
CS fundamentals and algorithmsShort answerBasics
If you had to implement a hash map yourself, how would you build it?
#hashmap
CS fundamentals and algorithmsShort answerBasics
Frame times arrive as a stream, one per frame. Design a type that returns "the average of…
#stream
CS fundamentals and algorithmsShort answerAdvanced
You've implemented an LRU cache and the interviewer follows up: "Now make each entry expi…
#hashmap
CS fundamentals and algorithmsShort answerBasics
In a one-hour coding test you have to find duplicates in a list of customer IDs and also …
#hashmap