PTWI

1. What is convenience initializer?
2. Write syntax for NSOperation Queues and Dispatch Queues?
3. Difference between array and set?
4. What is defer keyword?
5. In portrait mode, one view is there in top left corner, and how can put that view in landscape mode at bottom left corner?
6. Push notifications?
7. What is singleton class?
8. What is advantage of MVVM over MVC?
9. Can you implement MVVM in high-level in swift-fiddle online playground?



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