Return a histogram from a stream of numbers

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I was asked this question to test my knowledge of scalability. There are a stream of numbers and I have to return a histogram representing these numbers. I asked questions like what would be the range of the numbers and what would be the bucket size of the histograms etc. to which he responded that I could select the bucket size and I don't have to rescale the buckets etc. So my solution was that as I receive a number I will update a counter for a particular bucket. In the end I will return back the buckets like 0-100,101-200 and the corresponding count of each bucket. I didn't get through the interview and I was wondering as to what would be a suitable answer to a question like this

Posted 22-Dec-15 23:20pm

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Richard MacCutchan · Answer 1 · 2015-12-23T00:40:00

Solution 1

As you have already been told, there is no suitable answer apart from the one the interviewer was expecting. If you want to pass an interview, the only way is to have a good understanding of, and experience in, the subject role that you are interviwiewing for.

Posted 23-Dec-15 0:40am

Richard MacCutchan