What language is ios written in?
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How can an operating system improve battery life while running an app?
What are sensors in iphone?
What is advantage of categories? What is difference between implementing a category and inheritance?
What is nsuserdefaults?
Explain ~/documents, ~/library, ~/tmp. What directory is ~ on ios?
What is gcd in ios swift?
What is meaning of 'atomic' keyword?
Explain the different types of ios application states.
What does static analyser do?
Are document objects required for an application? What does they offer?
What is push notification?
How can you respond to state transitions on your app?