What is swift and what is objective-c?
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What are properties in ios?
What is advantage of categories? What is difference between implementing a category and inheritance?
What are sensors in iphone?
what are fetched properties? How do you create a fetched property?
Explain parent-child context setup?
Differentiate 'app id' from 'bundle id'.
Explain the usage of struct?
What is the concurrency how many ways you know to achieve concurrency?
Different types of persistent stores? Which all types can we have on ios?
What is the purpose of UIWindow object in iOS operating system?
What are the features of ios?
Which are the app’s state transitions when it is launched?