What is delegate in ios objective c?
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What is the difference between synchronous & asynchronous task ?
How does the runtime handle message passing? What is message forwarding?
What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?
What is retain in ios?
How to use core data objects between two threads?
What is libdispatch?
How to parse json? Explain
How can a user respond or react to the state transitions on the app?
What is the purpose of reuseidentifier? What is the benefit of setting it to a non-nil value?
How much do ios developers get paid?
What is the concurrency how many ways you know to achieve concurrency?
What is messaging? How does the runtime handle message passing?