You are given 9 balls and they look exactly the same in color and physical appearance. You are also given a scale. To make things easy you are given that one of the balls amongst these 9 balls is heavy. How can you find out which ball is heavy with least number of weighings?
What is the reuse-identifier used for?
What gives the quickest access: CPU register, CPU cache, RAM, HDD. Write -1 as a 4 bytes integer using hexadecimal notation
In coding test, they gave no clear requirements, just some api call and location update related question.
What will be printed after the following code? class TestClass { var aBlock: (() -> ())? = nil let aConstant = 5 init() { print("init") self.aBlock = { print(self.aConstant) } } deinit { print("deinit") } } var testClass: TestClass? = TestClass() testClass = nil
Given an array of strings, remove any duplicates and return a new array containing the first occurrence of each string.
Pretend you're given a simple iOS app with a table view and a text field which looks like a search bar. It has methods to call to a remote server to get potential auto complete words. Describe how you would actually implement the iOS side.
Addition of 2 binary numbers.
Given an array that contains numbers and/or other nested arrays, write an algorithm to come up with a sum of these elements, multiplied by the depth (or how many arrays deep) you are. For example, what would you do with an input array that looks like: [ 2, 3, [ 9, [ 1, 2 ]], 4]
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