To prevent memory leakage, iOS uses a policy based on a number, which is maintained by every reference object. What is it called?

Which classes provides input data to a capture session?

Which is the App Transport Security (ATS) exception domains dictionary keys (not primary keys)?

Which App Transport Security dictionary keys are of the type, Boolean?

Which statement is correct about NSFetchRequest?

In iOS 10, which is the new methods introduced in the NSManagedObject class?

In ARC enabled project: [someObject release];

What is a category?

What function do you call to close the current view and go back to the root?

Difference between Cocoa and Cocoa Touch?

What structure can hold an x and y coordinate that defines a location?