Apple iOS Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apple iOS Interview Questions

Questions Answers Views Company eMail

What is a memory leak?

845

Why don’t we use strong for enum property in objective-c ?

1063

What is gcd? How is it used?

766

Why do we use synchronized ?

805

What widgets can not do ?

891

What is synchronous vs. Asynchronous in gcd ?

780

What is the ? In swift?

863

What is @synthesize in objective-c ?

832

What’s the difference between an “app id” and a “bundle id” and what is each used for?

877

What is a category and when is it used?

888

What are “strong” and “weak” references? Why are they important and how can they be used to help control memory management and avoid memory leaks?

773

What are the limits of accessibility ?

848

Explain the characteristics of ios?

810

Explain place holder constraint

780

Explain differences between foundation and corefoundation

835

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Un-Answered Questions { Apple iOS }

How to add an iphone os user to your team as a tester?

765

What manual memory management?

791

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

812

What are ios apps written in?

807

Is ios multithreading?

813

What are b-trees?

806

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

803

What is gcd in ios?

893

Can you please explain the difference between frame and bounds?

850

What is a thread in ios?

717

What is mvc design pattern in ios?

920

How can we achieve singleton pattern in iOS?

845

Explain parent-child context setup. How does it work? What are the advantages?

765

What are properties in ios?

797

What is delegate protocol in ios?

761

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