What is a memory leak ios?
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What is meaning of 'copy' keyword?
Which framework delivers event to custom object when app is in foreground?
What is sandbox in iOS operating system?
Can you pass same core data objects between different threads and modify?
Explain which all events will perform an ios application in background
What is fast enumeration?
What devices will support ios 7?
What are the app states in ios?
What is meaning of 'retain' keyword?
What is reuse identifier?
what is the difference between nonatomic & atomic ? which is thread safe and why
What is difference between weak and strong in ios?