Test your basic knowledge |

iOS 5 App Development Objective C

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. Reducing details to focus on the core concepts






2. NSString *s = @'Hello - World'; is an example of...






3. A callback is a function that is supplied in advance of an event - and...






4. Whenever a UINavigationController is about to swap views - it sends out two messages






5. Also if you send the NSObject the _ message - you own that object.






6. Why properties?






7. A method in a _ is required unless its preceded by an @optional.






8. When overriding a method - all you need to is _ - you do not need to declare it in the header file because it has already been declared by the superclass....






9. Any other initializer a class has calls the _ designated initializer....

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10. Also - because arrays only hold a pointer to an object...






11. Class methods typically either create






12. If the view has no subviews - create it programmatically; if it has subviews






13. After accessors have been defined in the header file...






14. Any individual object belonging to any class...






15. id is a...






16. Core foundation classes are prefixed with _ and suffixed with _






17. When do you take ownership?...






18. A view exists within a hierarchy. The window (an instance of UIWindow) is a view and the root of the hierarchy. It has _ (that appear on the window). Those views can also have _.






19. NSValue - class...






20. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern






21. A command directed to an object is called an...






22. Class methods do not operate on an _ or have any access to _ variables....






23. Object Oriented based analogue to a function is called a...






24. The class is responsible for what instance variables the instance has - but not the _ of those variables.






25. @property declares - and _ implements the setter and getter...






26. Only exists within the statement block there defined - outside of the block is fine






27. A collection object - an ordered list of objects that can be accesed by an index






28. A view is a subclass of _






29. In Objective C - the name of a setter method is set plus the name of the instance variable it is changing - for example PossessionName would be...






30. class methods...






31. A function in the objective c library that simply displays or logs it's argument






32. NSString* s2 = [s uppercase String]; Is an example of what kind of instance?






33. A UITableView usually needs three different pieces...






34. When do we need to release our outlets?

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35. Use of class methods - there are three...






36. Primitives and C Structures...






37. Views have three properties related to their location and size: @property _ _;






38. Name of the method to be executed






39. The notion that the data for an object is stored in it's instance variables and is accessed only by the objects methods. This maintains the integrity of the data.






40. When making a tableView always...






41. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....






42. Each class picks one _ as it's designated initializer....






43. initWithFrame: the designated initializer for UIView gives the view






44. In object oriented languages - we call methods that get and set instance variables accessors - individually we call them...

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45. To load a Xib file manually - you use _






46. NSString objects are usually sent _ rather than _...






47. When an NSMutableArray is deallocated - it sends...






48. Files Owner...






49. When an object is added to a NSMutableArray - that object is sent the message to retain;...






50. A delegate is a pointer to an object with a set of methods the delegate-holder knows how to call. In other words - it's _ from a later created object