Define cocoa?
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What is nspersistentstore?
What is @synthesize?
What is the difference between weak and strong?
Define decoding or deserialization and encoding or serialization?
Tell about block and GCD
Difference between release and autorelease ?
Define 'retain' keyword?
When to use nsmutablearray and when to use nsarray?
Explain xib?
Explain difference between sax parser and dom parser?
Explain what is storyboard?
What is a weak var?