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given an API that looks like this: interface EventReporter { enum Interval = {SECOND, MINUTE, HOUR}; public void recordEvent(String eventName, LocalDateTime t); public Map<String, Int> getEventCounts(String eventName, LocalDateTime start, LocalDateTime end, Interval i) } and data that looks like this: "x", 20:00:01 "x", 20:00:01 "x", 20:00:15 "x", 20:10:00 "x", 20:58:00 Describe a data structure and how you might implement the API's that come up with counts (via the "getEventCounts") for these three different "interval" types: Ask for event counts for "x", from 20: to 21:, with interval Second, you'd get: {"20:00:01": 2, "20:00:15": 1, "20:10:00": 1, "20:58:00": 1} Or with interval Minute: "20:00" -> 3, "20:10" -> 1, "20:58" -> 1 Or with interval hour: "20" -> 5
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Mobile Software Engineer

Interviewed at American Express

4.1★
Feb 21, 2016

given an API that looks like this: interface EventReporter { enum Interval = {SECOND, MINUTE, HOUR}; public void recordEvent(String eventName, LocalDateTime t); public Map<String, Int> getEventCounts(String eventName, LocalDateTime start, LocalDateTime end, Interval i) } and data that looks like this: "x", 20:00:01 "x", 20:00:01 "x", 20:00:15 "x", 20:10:00 "x", 20:58:00 Describe a data structure and how you might implement the API's that come up with counts (via the "getEventCounts") for these three different "interval" types: Ask for event counts for "x", from 20: to 21:, with interval Second, you'd get: {"20:00:01": 2, "20:00:15": 1, "20:10:00": 1, "20:58:00": 1} Or with interval Minute: "20:00" -> 3, "20:10" -> 1, "20:58" -> 1 Or with interval hour: "20" -> 5

A challenge to design a system which includes an Android device on one side of the world, and an Amdocs system on the other, the mission is to describe by main lines, how to build the system so the user will be able to see his cellular bill, amount of internet data left for his package, and any other financial detail about his own account. plus one more limitation which the data package is limited to 500mb ONLY while using WhatsApp application.
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Mobile Developer

Interviewed at Amdocs

3.7★
Dec 22, 2014

A challenge to design a system which includes an Android device on one side of the world, and an Amdocs system on the other, the mission is to describe by main lines, how to build the system so the user will be able to see his cellular bill, amount of internet data left for his package, and any other financial detail about his own account. plus one more limitation which the data package is limited to 500mb ONLY while using WhatsApp application.

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