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08 January, 2016

Are you just about to Hire iOS Objective C Developer?

iOS Objective-C Developer interview questions

Objective-C is extremely powerful but also one of the harder programming languages to learn, which is why evaluating candidates for their Objective-C Development skills is a crucial step before hiring.

To help you find your next iOS coding genius, I have compiled a list of Topics interview questions that can be asked while interviewing an iOS Objective-C developer.

iOS Objective-C Topics

Questions can be asked on many topics that include –

  • ARC Automatic Reference Counting
  • XCode
  • UI
  • Location Manager
  • UI Gesture
  • View Controller
  • Cocoa application
  • Framework
  • Libraries
  • Fonts related Questions
  • Scenario Based questions
  • Properties and Attributes in IOS
  • Memory Management

Below is the round-up of few interview questions for an iOS Objective-C developer. Question complexity may differ as per the experience level. If you would like to conduct an employment test for Objective-C developer - check this out.

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Here is the compilation of few objective C interview questions for experienced iOS Objective-C developer.

Interview Questions for an iOS Objective C Developer:

  1. What is the difference between boxName and self.boxName?
  2. How auto-release pool is managed?
  3. Why is category better than inheritance?
  4. What is the split view controller?
  5. The advantages and disadvantages about synchronous versus asynchronous connections.
  6. Three occasions when you might use your own auto-release pools.
  7. Can we use one table-view with two different data-sources? How will you achieve this?
  8. Difference between categories and extensions.
  9. Difference between shallow copy and deep copy.
  10. How to access the encapsulated data in objective-c?
  11. Tell four frameworks used in iPhone.
  12. What are layer objects and what do they represent?
  13. How do you change the content of your app in order to change the views displayed in the corresponding window?
  14. Which object manage the presentation of app’s content on the screen?
  15. Are document objects required for an application? What do they offer?
  16. How is the app delegate is declared by X-code project templates?
  17. Assume that system is running low on memory. What can system do for suspended apps?
  18. An app is loaded into memory but is not executing any code. In which state will it be in?
  19. Give example scenarios when an application goes into In-Active state.
  20. Which framework delivers event to custom object when app is in foreground?
  21. What is atomic and non-atomic? Which one is safer? Which one is default?
  22. What are all the difference between categories and subclasses? Why should we go to subclasses?
  23. What happens when the following code executes?
    Ball *ball = [[[[Ball alloc] init] autorelease] autorelease];
  24. Can you explain what happens when you call autorelease on an object?

If you want to quickly evaluate a candidate for his technical skills in Objective C for iOS, iMocha has created an online iOS Objective-C skill test that contains meaningful application oriented and theory based objective C interview questions for experienced to evaluate the job readiness of an iOS developer.

Let us know how you find this test?

Rachana Mishra
Rachana Mishra
Growth Officer at iMocha

Topics: Tech Recruitment, Remote Hiring, Skills Assessment

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