Answer Posted / maanya

NSArrayʼs contents can not be modified once itʼs been created whereas a NSMutableArray can be modified as needed, i.e items can be added/removed from it.

When was ios invented?

795

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What are different ways that you can specify the layout of elements in a uiview?

794

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What is the difference between atomic and nonatomic properties? Which is the default for synthesized properties?

712

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What are the Common reasons for app rejection from app store review process?

794

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What is cocoa and cocoa touch?

783

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Why we use delegate in ios?

725

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What is background state in ios?

830

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Do you know any other changes to ios 7 since wwdc?

737

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Can we support the same application for iphone 3gs and iphone 5, 6, 7? Why not?

723

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What is messaging? How does the runtime handle message passing? What is message forwarding?

871

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Explain how an autorelease pool works at the runtime level

2657

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How do you setup/initialise a core data stack in your application? Is this activity performed on main thread? If not, why?

725

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What is id in ios?

773

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How to start a selector on a background thread.

758

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Explain about AFNetworking. What is the base class used in AFNetworking library

2136

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