Test your basic knowledge |

iOS 5 App Development Basics

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. Consider: int x = 6;int y = 7;float quotient = (float) x/y;The statement that creates the variable 'quotient' is an example of ...
casting
nonatomic
Integrated Development Environment
proxy

2. Postcondition repetition structure syntax
controller
do{/*stuff to do here*/}while(<boolean expression>);
segmented control
ommand+Return

3. Purpose of the 'Auto-enable Return Key' attribute for text fields
IBOutlet
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field
Identity Inspector
Commmand-R

4. The Utilities area has two sections: ______ and ______
[shrinkButton setTitle:@'Grow' forState: UIControlStateNormal];
Outlets ... pointer
inspector and library
UITextView

5. Size of iPhone retina icon image in pixels
Command+1
pound
114 x 114
Home button

6. Boolean for 'false' in Objective-C
NSMutableArray
NO
if(<boolean condition>){/* stuff to do*/} else{ /*stuff to do*/}
UILabel *myLabel = [[UILabel alloc] initWithString:@'GO!'];

7. Class that another class inherits from
Attribute settings for some onscreen controls (like text areas) that analyze content and provide helpful links based on what they find. For example - phone numbers can be touched to dial the phone; web addresses can launch Safari if tapped - etc
superclass
convenience
Object-oriented programming

8. The library that contains the objects you can add to a view or XIB file
m
[myLabel setText:@'Howdy'];
Object library
Double-click

9. Scaling factor to make an image suitable for retina display
Attributes Inspector
Option+Command+ 0
2
pipe

10. The Inspector you would use to control your layout in Interface Builder
Home button
Program received signal: EXC_BAD_ACCESS
casting
Size Inspector

11. Tests to see whether two values are not equal
view
Outlets ... pointer
utility
!=

12. The goal of the MVC design pattern
Isolate the functional components of an app
bool
retain
||

13. Name of the drop-down menu in Xcode that lets you select the device used with the iOS Simulator
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field
instantiation
Scheme
The Console area of the Debug area

14. Other name for an *.xib file
convenience
nibfile
NeXSTEP
protocols

15. Name of the '|' symbol
pipe
<>
token
view controller

16. Syntax for sending an object a message with one parameter (p1)
viewDidLoad
interface and implementation files
retain
[<object variable> <method name>: p1];

17. An app has boolean variables 'hasShrunk' and 'hasMoved'. Write a boolean condition that checks if each are true
nibfile
#import 'myFile.h'
hasShrunk==YES && hasMoved == YES
NSObject

18. What computer language is the storyboard written in?
float
&&
interface file
XML

19. This keyword in the property directive is related to the concept of mutability and basically asks Apple to handle the details. This is the more 'relaxed' - less 'powerful' setting of two possibilities
NSMutableString
id
y *= 5;
nonatomic

20. Tests to see whether two values are equal
productivity
subclass
parameter
==

21. A class that manages the user's interaction with the iDevice
Gray circle with a white 'X' in it - positioned to the right of the text field box
hasShrunk==YES && hasMoved == YES
scene
view controller

22. If you have an image file called 'myImage.png' and you make a hi-res version for the retina display - what should be the name of the new file?
Program received signal: EXC_BAD_ACCESS
myImage@2x.png
iOS Simulator
NSDictionary

23. Templates fill in a bunch of ______-_______ code that serves as a framework in which to write future implementations
rand( )%21
boiler-plate
Objective-C
superclass

24. Declaring a method in an interface file - before it is actually implemented is called _______ the method
prototyping
casting
[shrinkButton setTitle:@'Grow' forState: UIControlStateNormal];
alpha ... 0

25. @property directives should be placed ____ (above or below) any IBActions in the header file
Size Inspector
Jump Bar
interface and implementation files
above

26. In most graphical user interfaces - a _____ view is a view that must be dismissed ('OK' button - 'Cancel' button for example) before the user can perform any other actions in the application.
NSLog(@'%s' - __FUNCTION__);
'Software Development Kit'
modal
Option+Command+4

27. Extension for interface file
NSString *userName;
NSArray
h
stub

28. Resembles a slot machine display
workspace
UIImageView
UIPicker
Object library

29. Alternative selection mechanism when many conditions exist
switch
disclosure triangle
Determine how controls resize/reposition themselves when a device changes orientation
114 x 114

30. To unroll or roll up a hierarchy of files - objects or classes - you click the ______ _______ at the root element
%1.2f
boiler-plate
disclosure triangle
rand( )%21

31. Defines the functional building blocks (classes) that make iOS devices perform certain actions
image view
Cocoa Touch
NSMutableString
[<object variable> <method name>: p1];

32. What do the Autosizing settings of the Size Inspector do?
Determine how controls resize/reposition themselves when a device changes orientation
Touch Up Inside
label
UIViewController

33. Syntax for declaring a string called 'userName'
double
Scheme
114 x 114
NSString *userName;

34. In the US - the '#' symbol is often called the ____ symbol
parameter
pound
wrap
-

35. Collection of interface elements and data storage elements etc you can access from your applications
[<object variable> <method name>];
%@
Cocoa Touch
property list

36. A unique combination of view controller and view
Cocoa Touch
scene
attributes
myImage@2x.png

37. Connections between Objects in the Interface Builder and the header file are formed by _____-_______ from the object to the proper place in the header file
switch
Cocoa Touch
NSString *phrase = @'Hello World';
control-dragging

38. Development approach (design pattern) to structure iOS applications
UIImage *wp1 = [UIImage imageNamed:@'wallPaper_01.png'];
NO
Xcode
Model-View-Controller

39. Purpose of 'Secure' attribute for text fields
Treats the field as a password - hiding each character as it is typed
Jump Bar
parameter
instantiation

40. Attribute that informs Xcode not to worry about different parts of the application using a property at the same time
Program received signal: EXC_BAD_ACCESS
web view
nonatomic
Identity Inspector

41. Syntax for declaring a variable
nil
<type> <variableName>;
IBAction
casting

42. Something the simulator cannot reliably test
Actions
Cocoa Touch - Media - Core Services - Core OS
performance
@

43. Key sequence to open the Attributes Inspector
Determine how controls resize/reposition themselves when a device changes orientation
Option+Command+4
eXtensible Markup Language
Option-click a symbol

44. In the MVC design pattern for iOS apps - this aspect is responsible for receiving user input and acting accordingly - and serves as a 'bridge' between the other two components. It is the backbone of the app.
controller
Home button
Application Programming Interface
pipe

45. A view that is displayed on top of an original view when user interactions are required
#import <UIKIT/UIKIT.h>
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
above
modal views

46. Syntax for single-line comment
workspace
Single View Application
//blah blah blah
NSDictionary

47. Data type for true/false type variables
@
alpha
bool
while(<boolean expression>){/*stuff to do here*/}

48. Term used to describe each screen of an iPhone app
label
import
view
Actions

49. Process of creating an active object from a class
attributes
instantiation
implementation file
Object Library

50. Creates 'getters' and 'setters'
[shrinkButton setTitle:@'Grow' forState: UIControlStateNormal];
%d
@synthesize directive
retain - release - dealloc - autorelease