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iOS 5 App Development Objective C

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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. Core foundation classes are prefixed with _ and suffixed with _
declaration and initialization of a variable
only the class and subclasses can access
CF - Ref
they need to be defined in the implementation file

2. 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.
CF - Ref
copy - retain
superclass's

3. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
lowercase - uppercase
reuse your cells
methods
pointer to an object

4. Primitives and C Structures...
Ready-Made Instance
cannot be added to an array
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
method

5. Proceed through the loop - jump back to the top and check again
UIViewController
first responder
Continue
@synthesize

6. @property declares - and _ implements the setter and getter...
Functions
selector[message]
@synthesize
method

7. Each individual instance is a bundle of data that it maintains. Typically that data is private - which means that it's encapsulated as well; no other object knows what that data is or in what form it is kept. The only way to discover from outside wha
Maintenance of state
is an instance of that class
ready-made instances - instantiation from scratch - and nib based instantiation
Controller Objects[Managers]

8. A collection object - an ordered list of objects that can be accesed by an index
view controller
C Functionn
superclass's
array[class - NSMutableArray]

9. How do I implement my drawRect?
object
Core Graphics Framework
header files declare
only the innermost loop in which the break is executed is terminated

10. UIImageView is used to...
message
Object wrapper around primitive types like int - float - double - BOOl
only the class and subclasses can access
draw images

11. When an NSMutableArray is deallocated - it sends...
attributes - behavior
the message release to all its entries
pointer to an object
has one root view controller

12. NSArray - important methods...
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
protocol
will be ignored
receiving and handling events that are associated with it

13. A view is an...
initializer
safety - subclassability and makes code look more consistent with C structs
instance of UIView or one of its subclasses
an object's property

14. Ready-made instances...
calling code that does the instantiation for you
setPossessionName
initializers
an object's property

15. When do we need to release our outlets?

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16. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
type - name and value
receiver[message]
new instances of the class or retrieve some global property of the class.
class methods - initializers

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

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18. id is a...
setPossessionName
pointer to an object
only the class and subclasses can access
self

19. 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
initializers
Model Objects[Factory Worker]
UIView

20. Instance Variables by default are called @protected meaning...
only the class and subclasses can access
the message release to all its entries
super - self
Continue

21. Classes describe two things...
attributes - behavior
they need to be defined in the implementation file
ordered collection of objects - immutable
only the innermost loop in which the break is executed is terminated

22. The class is responsible for what instance variables the instance has - but not the _ of those variables.
message
values
@interface ClassName:SuperClassName
arguments[message]

23. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
class methods - initializers
a single-array can contain objects of different types
receiver
header files declare

24. NSDictionary...
superclass's
Hash table - Look up objects using a key to get a value.
CGRect
message

25. Why properties?
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
only the class and subclasses can access
safety - subclassability and makes code look more consistent with C structs
do so in viewDidLoad

26. UIView - designated initializer...
method
(id)initWithFrame:(CGRect)aRect;
NSCoder
CGRect

27. An instance is a device for maintaining state. It's a box for _ of data.
NSBundle
storage
Encapsulation of functionality
receiver

28. Just a floating point number - but we always use it for graphics.
(id)initWithFrame:(CGRect)aRect;
CGFloat
data source - view controller and delegate
alloc - singleton - informational utility method?

29. A pointer to the object being asked to execute a method
cannot be added to an array
receiver[message]
Abstraction
pointers

30. A responder is responsible for...
has one root view controller
receiving and handling events that are associated with it
NSCoder
implementation

31. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
self
NSCoder
a single-array can contain objects of different types
@interface ClassName:SuperClassName

32. At the top of any implementation file...
you must import the header file of that class
do so in viewDidLoad
size and position
Object wrapper around primitive types like int - float - double - BOOl

33. Categories are an Objective C way to add _ to an existing class without subclassing
callbacks
variable scope - if defined within a block
methods
you must import the header file of that class

34. The designated initializer calls the _ designated initializer....

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35. A UITableViewController can fill all three roles of...
NSLog routine
data source - view controller and delegate
message
for inheritance - adopting the superclasses implementation

36. if you implemented both the setter and getter - the @synthesize method...
Instantiation from scratch
will be ignored
receiver[message]
implementation

37. initWithFrame: the designated initializer for UIView gives the view
will be ignored
size and position
a mechanism to enable specific callbacks
they need to be defined in the implementation file

38. A method in a _ is required unless its preceded by an @optional.
Abstraction
protocol
variable scope - if defined within a block
only the innermost loop in which the break is executed is terminated

39. UITableViewController is a subclass of...
receiver - selector - arguments
dealloc - is called on the object & the object's memory is returned to the heap
UIViewController
has one root view controller

40. It's class is sent the message alloc - which creates an instance of that class and returns a pointer to it - and then that instance is sent the message init - which gives its instance variables initial values.
CGFloat
creating an initializer
Model Objects[Factory Worker]
only the innermost loop in which the break is executed is terminated

41. Defining variables - three parts...
type - name and value
NSCoder
receiver
new instances of the class or retrieve some global property of the class.

42. Three ways instances are created...
data
wait until the loop finishes processing the event - at the end release it
an object's property
ready-made instances - instantiation from scratch - and nib based instantiation

43. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
Generic object wrapper for other non-object data types
self
viewWillDissapear: and viewWillAppear:
an object's property

44. 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.
to give it someone else - or another object
first responder
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
nil

45. When do you take ownership?...
first responder
Anytime you call a method with new - alloc or copy. You own and must release that object.
superclass's
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear

46. A view represents a _ area
group of global functions already assigned to this class
rectangular
pointers
Core Graphics Framework

47. NSArray - class...
Data Encapsulation
has one root view controller
ordered collection of objects - immutable
Is a placeholder object

48. If you have extra work you want to do on the view...
self
arguments[message]
do so in viewDidLoad
'getters' and 'setters'

49. If a break statement is executed from within a set of nested loops...
NSLog routine
only the innermost loop in which the break is executed is terminated
is an instance of that class
CGRect bounds

50. The only reason to temporarily own an object - is...
to give it someone else - or another object
instance variable of an object is valid
initializers
CGRect bounds

Can you answer 50 questions in 15 minutes?

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iOS 5 App Development Objective C

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