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 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.






2. Objective-C methods are called using ____ _____






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






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






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






6. 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).






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






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






9. The first index in an array is valued at ____






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






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






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






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






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






15. 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.






16. The most flexible C data type: ______






17. Zeroing weak referencing should be used for _____ and data sources to prevent inadvertent retain cycles






18. Finding the method implementation to invoke in response to the message






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






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






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






22. The root class in Objective-C






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






24. 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.






25. All objects are created on the _____






26. Any class that's one step below another class in the inheritance hierarchy.






27. Objective-C binds methods and arguments at _____ instead of compile time






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






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






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






31. 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.






32. 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






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






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






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






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






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






38. Instance variables are optional in iOS if ________ are used






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






40. This symbol denotes a method as being an instance method






41. 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.






42. ______ operators take a single operand






43. Initializer method traditionally begin with the _____ prefix






44. 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.






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






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






47. 3 Common Float data types: float - _____ - CGFloat






48. ARC is susceptible to retain _____






49. A technique used in C-based languages where the operating system provides memory to a running application as it needs it instead of when it launches.






50. 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