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






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






3. A compiler feature that provides automated memory management






4. _____ data types can be both positive and negative






5. The time when files compiled from different source modules are linked into a single program. Decisions made by the linker are constrained by the compiled code and ultimately by the information contained in source code.






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






7. 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






8. The Objective-C runtime table that contains entries that associate method selectors with the class-specific addresses of the methods they identify.






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






10. 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.






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






12. A language such as C that organizes a program as a set of procedures that have definite beginnings and ends.






13. 3 Common Float data types: float - _____ - CGFloat






14. A method that can operate on class objects rather than instances of the class.






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






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






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






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






19. The root class in Objective-C






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






21. An architecture that facilitates communication between objects in different address spaces.






22. A Cocoa framework that implements an application's user interface; provides a basic program structure for applications that draw on the screen and respond to events.






23. Objective-C objects should use strong or weak ______






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






25. Short for mutual exclusion semaphore. An object used to synchronize thread execution.






26. Giving the compiler information about what kind of object an instance is - by typing it as a pointer to a class.






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






28. A class that's defined solely so that other classes can inherit from it. Programs don't use instances of this; they use only instances of its subclasses.






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






30. Any method that can be used by an instance of a class rather than by the class object.






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






32. In C all functions pass their arguments by ____ which means the compiler makes local copies of those arguments






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






34. 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.






35. Property attribute that causes the setter to store a strong reference to the assigned value






36. This symbol denotes a method as being a class method






37. A protocol that's declared with the @protocol directive. Classes can adopt these - objects can respond at runtime when asked if they conform to them and instances can be typed by those that they conform to.






38. 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.






39. 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






40. In computer science the mathematical concept of 'order of operations' is known as the 'order of ______'






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






42. The init... method that has primary responsibility for initializing new instances of a class. Each class defines or inherits its own. Through messages to self other init... methods in the same class directly or indirectly invoke it and then it - thro






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






44. 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






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






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






47. A remote message that doesn't return until the receiving application finishes responding to the message. Because the application that sends the message waits for an acknowledgment or return information from the receiving application - the two applica






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






49. Another name for a class that's defined solely so that other classes can inherit from it.






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