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iOS 5 App Development Objective C

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. Values to be supplied as the parameters to the method
Maintenance of state
to get and set variables
ordered collection of objects - immutable
arguments[message]

2. When you send a message to _ - you are sending a message to _ - but demanding that the search for the method begin at the superclass....
super - self
storage
in the dealloc - or when a Controller's view is 'unloaded'
Maintenance of state

3. Each _ has a 'designated' initializer method....
class
new instances of the class or retrieve some global property of the class.
Hash table - Look up objects using a key to get a value.
Functions

4. NSString objects are usually sent _ rather than _...
only the innermost loop in which the break is executed is terminated
view
copy - retain
Model Objects[Factory Worker]

5. When making a tableView always...
Used to find the time right now or to store past or future time/dates
rectangular
header files declare
reuse your cells

6. If a break statement is executed from within a set of nested loops...
type - name and value
implementation
superclass's
only the innermost loop in which the break is executed is terminated

7. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
object
methods
self
position

8. In object oriented languages - we call methods that get and set instance variables

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9. class methods...
pointers
an object's property
group of global functions already assigned to this class
calling code that does the instantiation for you

10. A view is a subclass of _
receiver - selector - arguments
declaration and initialization of a variable
size and position
UIView

11. 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....
lowercase - uppercase
object
nil
define it in the implemenation file

12. Class methods typically either create
Anytime you call a method with new - alloc or copy. You own and must release that object.
upper
@synthesize
new instances of the class or retrieve some global property of the class.

13. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
a single-array can contain objects of different types
CGRect
new instances of the class or retrieve some global property of the class.
Instantiation from scratch

14. The designated initializer calls the _ designated initializer....

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15. A UITableViewController can fill all three roles of...
data source - view controller and delegate
dealloc - is called on the object & the object's memory is returned to the heap
for inheritance - adopting the superclasses implementation
declaration and initialization of a variable

16. Also - because arrays only hold a pointer to an object...
C Functionn
a single-array can contain objects of different types
initializers
position

17. NSSet...
unordered collection of objects - objects must be unique
dealloc - is called on the object & the object's memory is returned to the heap
UIViewController
Data Encapsulation

18. In Objective C arrays can hold only...
message
methods
Core Graphics Framework
references to objects

19. When do we need to release our outlets?

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20. Asking a class or object to execute a method
variable scope - if defined within a block
message
C Functionn
Maintenance of state

21. NSArray - class...
ordered collection of objects - immutable
they need to be defined in the implementation file
calling code that does the instantiation for you
@interface ClassName:SuperClassName

22. Core foundation classes are prefixed with _ and suffixed with _
a single-array can contain objects of different types
CF - Ref
attributes - behavior
UIView

23. In Cocoa Touch - the table view asks another object _ what it should display...
selector[message]
its dataSource
class's
Ready-Made Instance

24. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
lowercase - uppercase
creating an initializer
receiver[message]
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear

25. Three ways instances are created...
instance variables
do so in viewDidLoad
ready-made instances - instantiation from scratch - and nib based instantiation
subview(s)

26. id is a...
pointer to an object
Encapsulation of functionality
C Functionn
do so in viewDidLoad

27. When an object is added to a NSMutableArray - that object is sent the message to retain;...
the array becomes an owner of that object and has a pointer to it.
creating an initializer
class's
variable scope - if defined within a block

28. After accessors have been defined in the header file...
causes the program to immediately exit from the loop it is executing - whether its for - while or do
selector[message]
they need to be defined in the implementation file
wait until the loop finishes processing the event - at the end release it

29. In general - in Objective-C - a reference to an instance is a _ - and the name of the data type of what's at the far end of that pointer is the name of the instances's _.
pointer - class
creating an initializer
pointer to an object
upper

30. When the message endEditing: is sent to a view - if it or any of its subviews or currently the _ - it will resign its first responder statues - and the keyboard will be dismissed.
NSCoder
lowercase - uppercase
first responder
Core Graphics Framework

31. In any application with UINavigationController - the navigation controller...
is an instance of that class
has one root view controller
do so in viewDidLoad
they need to be defined in the implementation file

32. Prefixing a character string with an @ symbol [specific - NSString class]...
creates an instance of NSString that holds the character string
to get and set variables
setPossessionName
Maintenance of state

33. Delegation is an object oriented approach to
receiver[message]
CGRect
parentViewController
callbacks

34. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
cannot be added to an array
designated initializer
C Functionn
CGRect

35. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
position
Controller Objects[Managers]
is an instance of that class
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

36. You use _ to implement the view
class methods - initializers
CGRect bounds
nil
Object wrapper around primitive types like int - float - double - BOOl

37. A collection object - an ordered list of objects that can be accesed by an index
in the dealloc - or when a Controller's view is 'unloaded'
NSBundle
array[class - NSMutableArray]
first responder

38. NSValue - class...
variable scope - if defined within a block
setPossessionName
Generic object wrapper for other non-object data types
protocol

39. Origin of a view's coordinate system is _ left
super - self
in the dealloc - or when a Controller's view is 'unloaded'
receiver[message]
upper

40. When do you take ownership?...
lowercase - uppercase
receiver - selector - arguments
Anytime you call a method with new - alloc or copy. You own and must release that object.
receiver

41. initWithFrame: the designated initializer for UIView gives the view
declaration and initialization of a variable
instance
size and position
first responder

42. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
@interface ClassName:SuperClassName
receiving and handling events that are associated with it
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
instance of UIView or one of its subclasses

43. Each object does its own job - and presents to the rest of the world - to other objects - and indeed in a sense to the programmer - an opaque wall whose only entrances are the methods to which it promises to respond and the actions it promises to per
header files declare
upper
Encapsulation of functionality
safety - subclassability and makes code look more consistent with C structs

44. Reference Counting...
view
You take ownership for an object you want to keep a pointer to
C Functionn
initializers

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

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46. Also if you send the NSObject the _ message - you own that object.
creates an instance of NSString that holds the character string
position
retain
Instantiation from scratch

47. Proceed through the loop - jump back to the top and check again
Continue
is an instance of that class
NSBundle
Maintenance of state

48. In general - class methods tend to be factory methods - that is...
methods for generating an instance
self
dealloc - is called on the object & the object's memory is returned to the heap
UIViewController

49. @property declares - and _ implements the setter and getter...
cannot be added to an array
class
pointers
@synthesize

50. Just a floating point number - but we always use it for graphics.
Instantiation from scratch
message
protocol
CGFloat