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Scala engineering test

MathService

This is a test of debugging, coding and unit testing abilities. We are also looking at your aptitude for dealing with existing/legacy code.

The function gcd() in MathService is reported to fail with a Failure if no value is available in the DataEnvironment. Please make sure this function fails in a proper way, similar to existing error handling.

TopN

This is a test of your algorithmic ability .

The function findTopN(...) in TopN is supposed to find the top N highest unique integers in a very large but finite Iterator of integers. To process the Iterator of Int, you can only hold a few values in memory at a given time as you have to assume the full Iterator does not fit into memory. Therefore, a memory efficient way to process this list is required.

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Interview Test for Data Engineer

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