Oracle iOS Interview Questions

1)Is NSSet Thread-safe?
2)What if you are accessing the same NSManagedObjectModel in read and write purpose? how can you do?
3)Shat if there are 3 APIs and once the 2 APIs are done then only I will call the 3rd one. How can you do?
4)What is the difference between retain and assign, and when to use weak?
5)what are the scope specifiers are there and tell me scenarios when to use all?
6)What is AssociatedType and where we are using it generally? and tell me some use case?
7)I am having struct and want to pass it on Objective-C function, then how to do this?
8)What is Dynamic dispatch? and how it works?
9)What is Zombie? and how can you identify it?
10)What is the final keyword when it comes to using it on class and variable?
11)How do you do the setup of Push Notification?
12)Any features specifically you liked about iOS 14?
13)How do you parse an array of different response and using codable Protocol?
14)What are the types of dispatch queue and when it comes to the priority? which one is higher?
15)What is @dynamic keyword on adding it variable? and why specifically NSManagedObjectModel uses it?
16)When will you use unowned? and tell me some use case?
17)What are the things apple specially introduced in swift and objective c don’t have those?