iOS Interview Questions and Answers

Last updated on Feb 10, 2022

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iOS, formerly known as iPhone OS, is a mobile OS created and developed by Apple for its hardware. This operating system powers most of Apple’s devices, including iPhones, iPads, and iPod Touch. iOS is the world’s second most popular mobile OS after Android. The iOS UI is based on direct manipulation by using multi-touch. Apple has been active in including accessibility functions into iOS that even enable users with vision and hearing disabilities to use its products properly. If you have read our IOS interview questions, you can find your next dream job soon.

Advantages

User-friendly
Intuitive and fluid responsive
Excellent UI that works equally good for all purposes - media entertainment, gaming and business.
Less heat generated as compared to Android.
Best-in-class security.

Most Frequently Asked iOS Interview Questions

Here in this article, we will be listing frequently asked iOS Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q31. What is Core Data?

Answer

Q32. How do you setup/initialise a core data stack in your application? Is this activity performed on main thread? If not, why?

Answer

Q33. What is NSPersistentStoreCoordinator? What duties does it perform?

Answer

Q34. What is NSPersistentStore? Is it thread safe?

Answer

Q35. What is NSManagedObjectContext? What are the different concurrency types? Explain them.

Answer

Q36. What is NSManagedObjectModel?

Answer

Q37. What is NSManagedObject?

Answer

Q38. Different types of persistent stores? Which all types can we have on iOS?

Answer

Q39. Can my application have multiple models? (Yes)

Answer

Q40. In a single model, can I have few entities in one sqlite db file and remaining in another sqlite db file? (Yes, Hint: configurations)

Answer

Development History

iOS was unveiled in 2007 by Apple for its iPhone. Since then versions have been released annually.

Latest Version: The latest version is iOS 12, which was released in September 2018. Memorize this information for IOS interview questions and answers.

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