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S&P Capital IQ Intern Interview Question

I interviewed in New York, NY and was asked:
"There was one question on designing a class/set of classes which help to find the stock quote for a particular company. A method was provided which takes a sticker(String) as an input and gives the stock value(double). But this method was too expensive to call, so how would you optimize your solution(make the minimal number of calls to this method). Also the stock value returned should not be more than an hour old. There were subparts to this question, on caching the values and multithreading."
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Part of a Intern Interview Review - one of 220 S&P Capital IQ Interview Reviews

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