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Design an alert system. You have 500,000 hotels you represent, and about 250,000 are visited each day. You want to track hotel page visits such that, if more than 10 visitors per a) 5 minutes, b) 1 hour, and c) 24 hours occur, then a (different for each time period) "alert" appears when someone visits one of those "hot" hotel pages. Don't worry about the UI part, just design the underlying alert system. Then optimize your solution for space.
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Senior Software Engineer

Interviewed at Tripadvisor

3.5★
Apr 6, 2012

Design an alert system. You have 500,000 hotels you represent, and about 250,000 are visited each day. You want to track hotel page visits such that, if more than 10 visitors per a) 5 minutes, b) 1 hour, and c) 24 hours occur, then a (different for each time period) "alert" appears when someone visits one of those "hot" hotel pages. Don't worry about the UI part, just design the underlying alert system. Then optimize your solution for space.

Given an input stream of an indeterminate length, how do you return a random member of that stream (with equal probability for each), given that you're not allowed to store more than a constant number of inputs, and you can only go through the inputs once.
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Software Engineer

Interviewed at Tripadvisor

3.5★
Feb 25, 2015

Given an input stream of an indeterminate length, how do you return a random member of that stream (with equal probability for each), given that you're not allowed to store more than a constant number of inputs, and you can only go through the inputs once.

1.How much testers working? If you tell 4 testers , he will ask why 4 too many.. If you tell two why only two he will ask? 2.Why your company dont have agile? 3.If you tell that you have stand up meeting in non agile, he will ask, in agile only stand up meeting happen, he will reply.. The thing is stand up meeting is normal in all company, it is not a goverment policy that Agile process only has stand up meeting.. 4. What is your project dead line? 5.Do you have any fight with your team lead? So you planned to quit?
avatar

Software Test Engineer

Interviewed at Innoppl

3.9★
Feb 23, 2018

1.How much testers working? If you tell 4 testers , he will ask why 4 too many.. If you tell two why only two he will ask? 2.Why your company dont have agile? 3.If you tell that you have stand up meeting in non agile, he will ask, in agile only stand up meeting happen, he will reply.. The thing is stand up meeting is normal in all company, it is not a goverment policy that Agile process only has stand up meeting.. 4. What is your project dead line? 5.Do you have any fight with your team lead? So you planned to quit?

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