What is synchronous vs. Asynchronous in gcd ?


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Explain parent-child context setup. How does it work? What are the advantages?

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Explain commonly ios libraries

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Differentiate between ‘assign’ and ‘retain’ keyword.

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Will the new design mean I have to completely relearn how to use my phone?

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What is latest xcode version?

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What is @dynamic and any place where it is used?

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