What is nsmanagedobjectcontext? What are the different concurrency types?

406

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What is thread safe?

449

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How many types of background modes supported in ios?

416

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How we can execute some code when app is in background?

417

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How you can add frameworks in xcode project?

398

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What is a difference between stack and heap memory?

393

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What are different instruments xcode supports for app profiling?

420

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What do you mean by rest?

453

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What is the difference between strong and retain.

393

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How to animate view with constraint?

441

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What is the difference between weak and strong?

466

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What is the difference between developer and enterprise developer accounts?

413

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What are various singleton instances provided by frameworks?

400

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Explain concept of notification center, local and remote notifications.

354

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Is there an internet explorer for android?

480

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