The (...) method can be used to see if an object belongs to a class that implements a particular protocol.

In Objective-C, retain counts are the way in which memory is managed in Objective-C

A derived class can access all the private members of its base class if it's defined in the interface class

Which one is correct (legal) floating-point literal ?

What happens when the following code executes?

Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the (...) programming language

Why should you use an autorelease pool ?

Which of the following statements is correct?

What сan you use to avoid msgSend function overhead?

What happens if two categories define methods with the same names for the same class?

What happens at runtime with the following: NSMutableString *tempString = [NSMutableString stringWithString:@"1"]; dispatch_sync(dispatch_get_main_queue(), ^{ [tempString appendString:@"2"]; NSLog(@"%@", tempString); }); [tempString appendString:@"3"];