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. A variable that points to the memory address of another value






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






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






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






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






6. In object-oriented programming the ability of different objects to respond each in its own way - to the same message.






7. In object-oriented programming the object that is sent a message.






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






9. In a format string the place holder for an object is ______






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. A compiler feature that provides automated memory management






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






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






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






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






16. All objects are created on the _____






17. 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.






18. 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.






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






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






21. 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






22. 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






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






24. ARC is susceptible to retain _____






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






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






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






28. _____ operators take 2 operands






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






30. The time when source code is compiled; constrained by the amount and kind of information encoded in source files.






31. 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






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






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






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






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






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






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






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






39. 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.






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






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






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






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






44. 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).






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






46. 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.






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






48. 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.






49. 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.






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