Test your basic knowledge |

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. 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
causes the program to immediately exit from the loop it is executing - whether its for - while or do
Abstraction
Encapsulation of functionality
array[class - NSMutableArray]

2. NSArray - class...
(id)initWithFrame:(CGRect)aRect;
ordered collection of objects - immutable
CGRect
dealloc - is called on the object & the object's memory is returned to the heap

3. A responder is responsible for...
methods for generating an instance
receiving and handling events that are associated with it
self
Maintenance of state

4. If a break statement is executed from within a set of nested loops...
only the innermost loop in which the break is executed is terminated
designated initializer
creating an initializer
calling code that does the instantiation for you

5. A command directed to an object is called an...
message
Anytime you call a method with new - alloc or copy. You own and must release that object.
You take ownership for an object you want to keep a pointer to
has one root view controller

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

7. The integer prefix is...
method
'getters' and 'setters'
Instantiation from scratch
%d

8. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
C Functionn
position
retain
Instantiation from scratch

9. Primitives and C Structures...
type - name and value
is an instance of that class
wait until the loop finishes processing the event - at the end release it
cannot be added to an array

10. Just a floating point number - but we always use it for graphics.
Maintenance of state
CGFloat
creating an initializer
size and position

11. Typically the designated initializer has parameters for the most important and frequently used _ of an object
collection of collections - NSArray of an NSArray
receiving and handling events that are associated with it
you must import the header file of that class
instance variables

12. 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
is called every time the event occurs
receiving and handling events that are associated with it
'getters' and 'setters'

13. class methods...
arguments[message]
will be ignored
class methods - initializers
group of global functions already assigned to this class

14. Classes describe two things...
(id)initWithFrame:(CGRect)aRect;
arguments[message]
attributes - behavior
storage

15. UIImageView is used to...
instance variables
draw images
will be ignored
is an instance of that class

16. A message is always contained in square brackets - and has three parts
rectangular
attributes - behavior
receiver - selector - arguments
values

17. NSString *s = @'Hello - World'; is an example of...
copy - retain
declaration and initialization of a variable
upper
accessors - individually we call them 'getters' and 'setters'

18. Each class picks one _ as it's designated initializer....
group of global functions already assigned to this class
methods
initializer
class's

19. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
method
view controller's initialization method
attributes - behavior
initializers

20. Any individual object belonging to any class...
Core Graphics Framework
setPossessionName
is an instance of that class
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear

21. Whenever a UINavigationController is about to swap views - it sends out two messages
You take ownership for an object you want to keep a pointer to
viewWillDissapear: and viewWillAppear:
in the dealloc - or when a Controller's view is 'unloaded'
is an instance of that class

22. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
class's
the array relinquishes ownership of that object and no longer has a pointer to it
references to objects
class methods - initializers

23. A pointer to the object being asked to execute a method
to get and set variables
receiver[message]
superclass's
you must import the header file of that class

24. 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.
initializer
CGFloat
Generic object wrapper for other non-object data types
first responder

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

26. Hold data and know nothing about the user interface
Model Objects[Factory Worker]
Continue
'getters' and 'setters'
type - name and value

27. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
parentViewController
the array relinquishes ownership of that object and no longer has a pointer to it
Functions
designated initializer

28. Only exists within the statement block there defined - outside of the block is fine
group of global functions already assigned to this class
setPossessionName
variable scope - if defined within a block
NSLog routine

29. An instance is a device for maintaining state. It's a box for _ of data.
will be ignored
storage
class's
type - name and value

30. Object Oriented based analogue to a function is called a...
ready-made instances - instantiation from scratch - and nib based instantiation
only the innermost loop in which the break is executed is terminated
method
subview(s)

31. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
collection of collections - NSArray of an NSArray
ready-made instances - instantiation from scratch - and nib based instantiation
its dataSource
object

32. Class methods typically either create
pointer to an object
data
new instances of the class or retrieve some global property of the class.
instance variables

33. Reference Counting...
Data Encapsulation
You take ownership for an object you want to keep a pointer to
draw images
super - self

34. Values to be supplied as the parameters to the method
instance variable of an object is valid
Object wrapper around primitive types like int - float - double - BOOl
arguments[message]
the message release to all its entries

35. Core foundation classes are prefixed with _ and suffixed with _
UIView
CF - Ref
view controller
initializer

36. id is a...
alloc - singleton - informational utility method?
Functions
data source - delegate and view controller
pointer to an object

37. Defining variables - three parts...
initializer
Instantiation from scratch
type - name and value
declaration and initialization of a variable

38. 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.
CGRect bounds - GCPoint center - CGRect frame
to give it someone else - or another object
you must import the header file of that class
implementation

39. [Instance Variables] The code it gets from its class and in a sense is shared with all other instances of that class - but the _ belong to it alone.
data
receiver
%d
the array becomes an owner of that object and has a pointer to it.

40. initWithFrame: the designated initializer for UIView gives the view
data source - delegate and view controller
size and position
define it in the implemenation file
do so in viewDidLoad

41. Delegation is an object oriented approach to
'getters' and 'setters'
(id)initWithFrame:(CGRect)aRect;
an object's property
callbacks

42. A UITableView usually needs three different pieces...
data source - delegate and view controller
Core Graphics Framework
header files declare
'getters' and 'setters'

43. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
CF - Ref
will be ignored
subview(s)
NSCoder

44. When an object is removed from an NSMutableArray - that object is sent the message release;...
implementation
the array relinquishes ownership of that object and no longer has a pointer to it
Instantiation from scratch
pointers

45. A view is a subclass of _
UIView
Anytime you call a method with new - alloc or copy. You own and must release that object.
reuse your cells
parentViewController

46. Instance Variables by default are called @protected meaning...
is called every time the event occurs
@synthesize
class's
only the class and subclasses can access

47. A view represents a _ area
rectangular
instance variables
creates an instance of NSString that holds the character string
initializer

48. Name of the method to be executed
selector[message]
upper
create a XIB file
instance

49. NSString objects are usually sent _ rather than _...
copy - retain
class's
pointer to an object
collection of collections - NSArray of an NSArray

50. At the top of any implementation file...
CGFloat
declaration and initialization of a variable
array[class - NSMutableArray]
you must import the header file of that class