What is queue in ios?
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When a nsfetchrequest fetches an entity object from store, does it fetch all of its data at once?
What is weak and strong in ios?
What is uikit in ios?
Assume that an app is not in foreground but is still executing code. In which state will it be in?
What is thread safe?
What are the different delete rules that a relationship can have? Which one takes ownership?
Bundle & document directory, sandbox ?
What is the difference between 'assign' and 'retain' keyword?
When can you get ios 13?
Explain me how to parse json?
what is the difference between nonatomic & atomic
How to debug a crash in the auto-release pool?