What is synchronized() block in objective c? What is the use of that?
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What is the purpose of using ibaction and iboutlet?
What is iOS?
Bundle & document directory, sandbox ?
How core data works to save data in persistent storage?
What is difference strong and weak reference ? Explain.
What is fast enumeration?
Is realm db free?
What are kvo and kvc?
Why do you generally create a weak reference when using self in a block?
What is an iphone app?
Differentiate between ‘assign’ and ‘retain’ keyword.
what is singleton class? Why the whole application creates a single instance?