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Ios Software Developer Interview Questions
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Protocol and Delegate. find out second smallest from array.
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They asked final question about shuffling cards. The question is in Cracking Google Interviews and the answer is in the book also.
- shuffle an array. got to demonstrate each element has equal probability to get this random number. e.g. [1, 2, 3, 4, 5] becomes [4, 2, 1, 5 3]. each element has a 0.2 probability to get the random num - create a data structure to add a number, remove a number, and get a random number from added numbers. All method must have runtime O(1)
ios fundamental. define your color(e.g. red, green) in enum design pattern(e,g, delegate, MVVM) how to make asyn method call? write a method to multiple all the price by 0.8, given a currency. e.g. "John has USD 300. Mary borrowed USD75 from him." method is like String convert(String s, float multiplier, String currency) if i call convert("John has USD 300. Mary borrowed USD75 from him.", 0,8, "USD"), then it returns "John has USD 240. Mary borrowed USD60 from him."
Programming exercise was good- you had 1:15 hr in XCode to write a simple iOS application with data persistence, implement a shake motion gesture, localize it into french and spanish, and ensure the UI resized correctly. Then you had to write the test cases for your app. All told if you knew what you were doing you should have the basics done in under an hour. From there you can spend the rest of your time making the UI pretty.
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