Test your basic knowledge |

Objective C Programming Basics

Subjects : it-skills, apple
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In object-oriented programming the ability of different objects to respond each in its own way - to the same message.






2. Property attribute where the setter stores the assigned value but does not perform any memory management.






3. A tool that lets you graphically specify your application's user interface. It sets up the corresponding objects for you and makes it easy for you to establish connections between these objects and your own code where needed.






4. Two additional foundational building blocks of Objective-C distinct from data and procedure type foundations: ________ and Categories/Extensions






5. The direct or indirect report of external activity especially user activity on the keyboard and mouse.






6. A remote message that returns immediately without waiting for the application that receives the message to respond. The sending application and the receiving application act independently and are therefore not in sync.






7. A message sent from one application to an object in another application.






8. A _______ method is one that is likely to be unsupported in the future. It's use should be discontinued.






9. ARC is susceptible to retain _____






10. A logical subdivision of a program within which all names must be unique. Symbols in one do not conflict with identically named symbols in another.






11. Objective-C borrows much of its syntax from ______ one of the earliest object-oriented languages






12. Consider: [NSString alloc]. 'alloc' is an example of a(n) class method rather than a _______ method






13. In object-oriented programming the ability of a superclass to pass its characteristics (methods and instance variables) on to its subclasses.






14. The process of setting or reading the value at an address pointed to by a pointer






15. The root class in Objective-C






16. Rather than using arrays in Objective-C we often are able to use it's collection classes of NSArray - NSSet and NSDictionary with _____ for strings






17. A ____ ____ is a situation where you free memory and then accidentally continue to use it






18. An object in another application - one that's a potential receiver for a remote message.






19. Each class should have a ______ initializer a single method responsible for performing all of the object's setup and initialization.






20. If you are compiling an application with ARC (Automatic reference Counting) you _______ store Objective-C objects inside a struct






21. Pointers are declared by placing a(n) ___ between the type declaration and the variable name






22. In Objective-C floats are more commonly used than ______






23. Same as class object. (first way to say it.)






24. ______ data types are always zero or greate






25. Square bracket syntax for calling a method






26. To destroy an object set the variable that points to it to _____






27. In object-oriented programming an expression that sends a message to an object. In the Objective-C language they are enclosed within square brackets and consist of a receiver followed by a message (method selector and parameters).






28. _____ data types can be both positive and negative






29. A prototype for a particular kind of object; declares instance variables and defines methods for all members of the class.






30. Any variable that's part of the internal data structure of an instance; declared in a class definition and become part of all objects that are members of or inherit from the class.






31. Xcode sequence to convert non-ARC apps to ARC






32. The name of a method when it's used in a source-code message to an object or the unique identifier that replaces the name when the source code is compiled.






33. Three main categories of more complicated data structures:_______ - arrays and structs






34. When creating a class implementation file you begin with the _____ keyword and close with the @end keyword






35. Procedures (like verbs) are processes that manipulate or transform data and in Objective-C these 3 elements are _____ - functions and methods






36. Data types are divided into two main categories: integer and ______






37. 3 Common Float data types: float - _____ - CGFloat






38. A protocol declared as a category usually as a category of the NSObject class.






39. An advanced object-oriented development platform in Mac OS X; a set of frameworks whose primary programming interfaces are in Objective-C.






40. There are ____ fundamental building blocks in Objective-C






41. An instance variable that points to another object; _____ instance variables are a way for an object to keep track of the other objects to which it may need to send messages.






42. Objective-C methods are called using ____ _____






43. a++; is an example of using a _____ operator






44. In object-oriented programming - the method selector (name) and accompanying parameters that tell the receiving object in a message expression what to do.






45. _____ is one of the main advantages of object-oriented code and allows objects to 'hide away' much of their complexity operating at times like a proverbial 'black-box'.






46. A class is said to do this when it declares that it implements all the methods in the protocol.






47. In object-oriented programming the hierarchy of classes that's defined by the arrangement of superclasses and subclasses. Every class (except root classes such as NSObject) has a superclass and any class may have an unlimited number of subclasses.






48. _____ operators take 2 operands






49. Property attribute that causes the setter to store a copy of the assigned value






50. Property attribute that causes the setter to store a zeroing weak reference to the assigned value