What is difference strong and weak reference ? Explain.
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In which language ios is written?
What is called before viewdidload?
Which object is create by uiapplicationmain function at app launch time?
what is universal Application?
Differentiate between ‘assign’ and ‘retain’ keyword.
Explain ios multitasking?
What is nspersistentstore?
How do you stop apps running in the background on ios?
What is ios technology?
What are delegates in ios swift?
What is cococa and cocoa touch?
Which JSON framework is supported by iOS?