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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. A callback is a function that is supplied in advance of an event - and...
is called every time the event occurs
declaration and initialization of a variable
initializer
to get and set variables

2. Primitives and C Structures...
subview(s)
NSBundle
cannot be added to an array
@synthesize

3. A UITableView usually needs three different pieces...
Ready-Made Instance
new instances of the class or retrieve some global property of the class.
CGRect bounds - GCPoint center - CGRect frame
data source - delegate and view controller

4. When an object is added to a NSMutableArray - that object is sent the message to retain;...
initializers
the array becomes an owner of that object and has a pointer to it.
method
draw images

5. If you aren't going to initialize an instance reference pointer at the moment you declare it by assigning a real value - it's a good idea to assign it _.
nil
ready-made instances - instantiation from scratch - and nib based instantiation
reuse your cells
initializer

6. A function in the objective c library that simply displays or logs it's argument
will be ignored
the message release to all its entries
NSBundle
NSLog routine

7. Each class picks one _ as it's designated initializer....
alloc - singleton - informational utility method?
wait until the loop finishes processing the event - at the end release it
collection of collections - NSArray of an NSArray
initializer

8. If you have extra work you want to do on the view...
do so in viewDidLoad
pointer - class
instance
selector[message]

9. The integer prefix is...
%d
new instances of the class or retrieve some global property of the class.
method
callbacks

10. Three ways instances are created...
ready-made instances - instantiation from scratch - and nib based instantiation
Hash table - Look up objects using a key to get a value.
implementation
size and position

11. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
cannot be added to an array
instance
NSCoder
@interface ClassName:SuperClassName

12. 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
is an instance of that class
the array becomes an owner of that object and has a pointer to it.
a mechanism to enable specific callbacks
methods

13. In any application with UINavigationController - the navigation controller...
subview(s)
object
has one root view controller
creates an instance of NSString that holds the character string

14. 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
@interface ClassName:SuperClassName
wait until the loop finishes processing the event - at the end release it
Maintenance of state
first responder

15. @property - is using methods...
the instance variables
to get and set variables
retain
protocol

16. class methods...
Encapsulation of functionality
group of global functions already assigned to this class
references to objects
draw images

17. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
ordered collection of objects - immutable
viewWillDissapear: and viewWillAppear:
CGRect
receiver - selector - arguments

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

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19. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
CGFloat
self
selector[message]
creates an instance of NSString that holds the character string

20. The class is responsible for what instance variables the instance has - but not the _ of those variables.
values
will be ignored
Used to find the time right now or to store past or future time/dates
only the class and subclasses can access

21. The object to which a message is sent - the receiver can be referred to as self from inside the method that is invoked
initializer
receiver
UIView
instance of UIView or one of its subclasses

22. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
do so in viewDidLoad
C Functionn
Data Encapsulation

23. A command directed to an object is called an...
size and position
data source - delegate and view controller
creates an instance of NSString that holds the character string
message

24. Values to be supplied as the parameters to the method
Abstraction
arguments[message]
superclass's
instance of UIView or one of its subclasses

25. Any individual object belonging to any class...
method
Instantiation from scratch
Functions
is an instance of that class

26. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
ordered collection of objects - immutable
CGRect bounds - GCPoint center - CGRect frame
new instances of the class or retrieve some global property of the class.
NSCoder

27. Defining variables - three parts...
NSLog routine
self
subview(s)
type - name and value

28. Classes describe two things...
C Functionn
attributes - behavior
a single-array can contain objects of different types
Anytime you call a method with new - alloc or copy. You own and must release that object.

29. A _ handles touch events.
view
Anytime you call a method with new - alloc or copy. You own and must release that object.
group of global functions already assigned to this class
instance

30. A view is a subclass of _
group of global functions already assigned to this class
only the class and subclasses can access
instance variables
UIView

31. super - is used...
Functions
CGRect bounds
for inheritance - adopting the superclasses implementation
method

32. The designated initializer calls the _ designated initializer....

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33. NSValue - class...
receiver - selector - arguments
Encapsulation of functionality
Model Objects[Factory Worker]
Generic object wrapper for other non-object data types

34. Views have three properties related to their location and size: @property _ _;
CGRect bounds - GCPoint center - CGRect frame
viewWillDissapear: and viewWillAppear:
initializers
will be ignored

35. Instance Variables by default are called @protected meaning...
data
receiving and handling events that are associated with it
new instances of the class or retrieve some global property of the class.
only the class and subclasses can access

36. When do you take ownership?...
creating an initializer
Anytime you call a method with new - alloc or copy. You own and must release that object.
Ready-Made Instance
retain

37. A message is always contained in square brackets - and has three parts
receiver - selector - arguments
size and position
the array becomes an owner of that object and has a pointer to it.
object

38. NSDate - class...
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
class methods - initializers
they need to be defined in the implementation file
Used to find the time right now or to store past or future time/dates

39. Each _ has a 'designated' initializer method....
class
in the dealloc - or when a Controller's view is 'unloaded'
receiving and handling events that are associated with it
instance variable of an object is valid

40. NSDictionary...
Hash table - Look up objects using a key to get a value.
create a XIB file
message
Abstraction

41. Whenever a UINavigationController is about to swap views - it sends out two messages
class
dealloc - is called on the object & the object's memory is returned to the heap
viewWillDissapear: and viewWillAppear:
size and position

42. Reference Counting...
You take ownership for an object you want to keep a pointer to
@interface ClassName:SuperClassName
arguments[message]
data source - view controller and delegate

43. What happens when the last owner calls release?

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44. Asking a class or object to execute a method
message
safety - subclassability and makes code look more consistent with C structs
receiving and handling events that are associated with it
Object wrapper around primitive types like int - float - double - BOOl

45. NSString objects are usually sent _ rather than _...
create a XIB file
Anytime you call a method with new - alloc or copy. You own and must release that object.
copy - retain
to get and set variables

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

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47. Dynamic binding means that when we call a certain object's method - and there are several _ of that method - the right one is figured out at runtime.
implementation
ready-made instances - instantiation from scratch - and nib based instantiation
rectangular
for inheritance - adopting the superclasses implementation

48. Also - because arrays only hold a pointer to an object...
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
Abstraction
Object wrapper around primitive types like int - float - double - BOOl
a single-array can contain objects of different types

49. Number one use of protocols in iOS...
superclass's
designated initializer
delegates and dataSources
view controller

50. UIImageView is used to...
draw images
CGFloat
is called every time the event occurs
ordered collection of objects - immutable

Can you answer 50 questions in 15 minutes?

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iOS 5 App Development Objective C

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