What is a model class?

451

What is arc?

474

When a nsfetchrequest fetches an entity object from store, does it fetch all of its data at once?

459

What are the different store migration options? When are they used?

445

What is difference between shallow copy and deep copy in ios ? : IOS Architect

471

What is the difference between NSArray and NSMutableArray in iOS operating system?

466

Which programming language is used in ios?

445

How is it possible to improve battery life during execution of an application?

431

what are the two different smart groups in Xcode?

503

What is protocol in ios swift?

456

What size is 1x and 2x?

442

When to use nsmutablearray and when to use nsarray?

448

What is difference between unit tests and ui test in xcode?

407

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

535

What are all the difference between categories and subclasses in iOS operating system?

439