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. Initializer method traditionally begin with the _____ prefix






2. A way to package a logically related set of classes & protocols and functions together with localized strings & online documentation and other pertinent files.






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






4. A class is said to do this to a protocol if it (or a superclass) implements the methods declared in the protocol. An instance does this to a protocol if its class does. Thus an instance that does this to a protocol can perform any of the instance met






5. The part of an Objective-C class specification that declares its public interface which includes its superclass name & instances variables and public-method prototypes.






6. C-style strings are stored in an array of _____






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






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






9. In the Objective-C language the declaration of a group of methods not associated with any particular class.






10. Discovering the class of an object at runtime rather than at compile time.






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






12. ____ provide a concise & elegant method for defining a discrete set of values






13. Objective-C's protocols are really about communicating _____ _______






14. A set of method definitions that is segregated from the rest of the class definition.






15. An object of unknown class. Interface is published through protocol declaration.






16. In a home building analogy a ____ is the blueprint and the object is the house






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






18. _____ allow indirect access and modification of a variable's value.






19. The 6 main categories of operators are: ____ - arithmetic - comparison - logical - bitwise and membership






20. Same as class object. (second way to say it.)






21. 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.






22. A class that's one step above another class in the inheritance hierarchy; the class through which a subclass inherits methods and instance variables.






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






24. Placing a ____ before a normal variable name gives it's address






25. An object that acts on behalf of another object.






26. Objective-C is a _____ of the C language






27. The nine fundamental building blocks of Objective-C can be dividing into 2 categories: data and _______






28. A struct may contain multiple ____ consisting of different data types






29. The most flexible C data type: ______






30. Property attribute that synthesizes both a getter and setter for the property






31. The part of an Objective-C class specification that defines public methods (those declared in the class's interface) as well as private methods (those not declared in the class's interface).






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






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






34. In the Objective-C language an object that belongs to (is a member of) a particular class; created at runtime according to the specification in the class definition.






35. Created by the compiler - lacks instance variables and can't be statically typed but otherwise behave like all other objects. As the receiver in a message expression - a it is represented by the class name.






36. 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






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






38. Symbol used to denote a placeholder in a format string






39. _____ 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'.






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






41. Data (like nouns) represent the information we are processing and in Objective-C this made up of the four elements of C types - _____ - enums and objects






42. C-style strings always end with a ____ character






43. In object-oriented programming a procedure that can be executed by an object.






44. Property attribute that synthesizes only a getter for the property






45. A ____ _____ is where you forget to free up memory






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






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






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






49. A memory-management technique in which each entity that claims ownership of an object increments the object's reference count and later decrements it; allows one instance of an object to be safely shared among several other objects.






50. The time after a program is launched and while it's running. Decisions made at during this time can be influenced by choices the user makes.