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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. 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
has one root view controller
Functions
Object wrapper around primitive types like int - float - double - BOOl

2. An instance is a device for maintaining state. It's a box for _ of data.
message
define it in the implemenation file
storage
is called every time the event occurs

3. When a view controller presents a modal view controller - the _ of the modal view controller is set to be the parent of the presenting controller
parentViewController
references to objects
data
values

4. Never access a view controller's view in that...

5. NSSet...
is called every time the event occurs
Object wrapper around primitive types like int - float - double - BOOl
has one root view controller
unordered collection of objects - objects must be unique

6. A view is an...
instance of UIView or one of its subclasses
C Functionn
the instance variables
self

7. The root view controller typically creates the next view controller - and the next _ creates the one after that
you must import the header file of that class
pointers
view controller
a single-array can contain objects of different types

8. Defining variables - three parts...
attributes - behavior
UIViewController
type - name and value
class methods - initializers

9. Delegation is an object oriented approach to
callbacks
You take ownership for an object you want to keep a pointer to
Ready-Made Instance
methods

10. if you implemented both the setter and getter - the @synthesize method...
will be ignored
pointers
You take ownership for an object you want to keep a pointer to
Functions

11. All objects are accessed using...
retain
pointers
wait until the loop finishes processing the event - at the end release it
creating an initializer

12. @property - is using methods...
to get and set variables
cannot be added to an array
reuse your cells
Object wrapper around primitive types like int - float - double - BOOl

13. Class methods do not operate on an _ or have any access to _ variables....
position
Maintenance of state
the instance variables
instance

14. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
C Functionn
will be ignored
for inheritance - adopting the superclasses implementation
instance of UIView or one of its subclasses

15. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
pointer to an object
accessors - individually we call them 'getters' and 'setters'
self
Continue

16. A view represents a _ area
CGRect
rectangular
C Functionn
creates an instance of NSString that holds the character string

17. How do I implement my drawRect?
Is a placeholder object
Core Graphics Framework
copy - retain
Generic object wrapper for other non-object data types

18. Why properties?
safety - subclassability and makes code look more consistent with C structs
unordered collection of objects - objects must be unique
is an instance of that class
Abstraction

19. 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
Ready-Made Instance
a mechanism to enable specific callbacks
instance variables
its dataSource

20. A callback is a function that is supplied in advance of an event - and...
receiver
is called every time the event occurs
initializers
an object's property

21. Proceed through the loop - jump back to the top and check again
calling code that does the instantiation for you
Continue
variable scope - if defined within a block
initializer

22. To load a Xib file manually - you use _
alloc - singleton - informational utility method?
ready-made instances - instantiation from scratch - and nib based instantiation
C Functionn
NSBundle

23. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
CGRect bounds
Model Objects[Factory Worker]
Controller Objects[Managers]
in the dealloc - or when a Controller's view is 'unloaded'

24. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
NSLog routine
lowercase - uppercase
initializer
ready-made instances - instantiation from scratch - and nib based instantiation

25. Hold data and know nothing about the user interface
you must import the header file of that class
Model Objects[Factory Worker]
receiver[message]
first responder

26. 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
wait until the loop finishes processing the event - at the end release it
causes the program to immediately exit from the loop it is executing - whether its for - while or do
message

27. Whenever a UINavigationController is about to swap views - it sends out two messages
Model Objects[Factory Worker]
copy - retain
create a XIB file
viewWillDissapear: and viewWillAppear:

28. super - is used...
super - self
for inheritance - adopting the superclasses implementation
upper
position

29. 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.
CGRect
creating an initializer
delegates and dataSources
instance of UIView or one of its subclasses

30. Classes describe two things...
will be ignored
attributes - behavior
view controller
wait until the loop finishes processing the event - at the end release it

31. A command directed to an object is called an...
pointer to an object
message
Instantiation from scratch
draw images

32. At the top of any implementation file...
only the class and subclasses can access
viewWillDissapear: and viewWillAppear:
self
you must import the header file of that class

33. Property List...
collection of collections - NSArray of an NSArray
CGRect bounds
class methods - initializers
message

34. A UITableView usually needs three different pieces...
data source - delegate and view controller
ready-made instances - instantiation from scratch - and nib based instantiation
Ready-Made Instance
calling code that does the instantiation for you

35. For view controllers that are closely related - like a table view controller and its detail view controller - you can simply give them _ that point to each other.
you must import the header file of that class
Instantiation from scratch
instance variables
viewWillDissapear: and viewWillAppear:

36. 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
size and position
references to objects
upper
Encapsulation of functionality

37. Prefixing a character string with an @ symbol [specific - NSString class]...
to get and set variables
setPossessionName
new instances of the class or retrieve some global property of the class.
creates an instance of NSString that holds the character string

38. In the last line of an init method...
storage
@interface ClassName:SuperClassName
instance
you always return the newly initialized object(return self)

39. After accessors have been defined in the header file...
collection of collections - NSArray of an NSArray
they need to be defined in the implementation file
parentViewController
methods for generating an instance

40. A collection object - an ordered list of objects that can be accesed by an index
do so in viewDidLoad
array[class - NSMutableArray]
CGRect bounds
setPossessionName

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

42. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
Is a placeholder object
designated initializer
pointers
data source - view controller and delegate

43. When do we need to release our outlets?

44. NSString *s = @'Hello - World'; is an example of...
Controller Objects[Managers]
declaration and initialization of a variable
in the dealloc - or when a Controller's view is 'unloaded'
Is a placeholder object

45. In Cocoa Touch - the table view asks another object _ what it should display...
calling code that does the instantiation for you
setPossessionName
upper
its dataSource

46. Ready-made instances...
UIViewController
calling code that does the instantiation for you
reuse your cells
data source - delegate and view controller

47. Also if you send the NSObject the _ message - you own that object.
you always return the newly initialized object(return self)
safety - subclassability and makes code look more consistent with C structs
self
retain

48. Reducing details to focus on the core concepts
Abstraction
UIViewController
data
cannot be added to an array

49. A view is a subclass of _
UIView
self
Core Graphics Framework
implementation

50. What happens when the last owner calls release?