What is a background thread?
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Bundle & document directory, sandbox ?
What is the use of controller object UIApplication?
What is synchronous web request and asynchronous ?
What is gcd? How is it used?
Explain the usage of struct?
What does @dynamic mean?
Who is the founder of ios?
What is difference between weak and strong in ios?
What is ios technology?
Does ios support multitasking?
What is the responder chain?
What is strong and weak in ios?