Explain the difference between copy and retain?
What is the difference between synchronous & asynchronous task ?
Why do you generally create a weak reference when using self in a block?
what’s accessibilityhint?
What is made up of nserror object?
What is arc and how is it different from autorelease?
What are the benefits of swift over objective-c ?
How to avoid anr status?
Describe the android application architecture.
What are the multimedia features involved in making android popular?
What are the different forms of communication provided by the android applications?
What is the file features used in android?
What are the different modes of operations used in services for android?
What are different data storage options are available in android?
What do you know about intents?