Flex Interview Questions
Navin
1.Difference between ArrayCollection and ListCollectionView?
2.Difference between Array and ArrayCollection?
3. Difference between Sprite and UIComponent and how do you add a sprite to a canvas?
4. Difference between DisplayObjectContainer and DisplayObject?
5. What does listData contain in ItemRenderers? What is the Type of listData?
6. How do you access methods in DG from external itemRenderers?
7. What is the data type of the dataprovider property in DG?
8. What are the different data types that the data can take? How does it resolve different data types internally in the framework?
9.What collection change event gets fired when data changes in ArrayCollection?
10.What are the advantages of using arraycollection as a dataprovider instead of array in DG?
11.DataGrid extends which class?
12.What class does all list base controls extends? and implement?
13.Difference between style and a property?
14.How do you create a new style for a new brand new component just assembled with assets in createChildren() in action script extending UIComponent?
15.What will happen when you removeChild() and addChild()?
16.What does clear () do in graphics class?
17.What are non-visual components in flex? What class do they extend?
18.Where is finally used and what does it do?
19.What is overloading a constructor? How do you overload constructors in flex?
20.What is invalidation cycle? What are its uses?
21.How do you make a component participate in invalidation cycle?
22.What are – IstyleClient, IChildList, ILayoutManager,IToolTipManagerClient, IInvalidating, IValidatorListener, IFlexModule, IAutomationObject, IPropertyChangeNotifier, IRepeaterClient, ISimpleStyleClient, IStateClient, IConstraintClient
23.Why there is no invalidation cycle for createChildren()?
24.How do you make a component participate in event mechanism?
25.What is the DOM of a flex application?
26.Where do you normally use IFlexDisplayObject?
27.How do you create skinning for a component?
28.What is localToGlobal and globalToLocal?
29.What are explicitHeight, explicitWidth, unscaledWidth, unscaledHeight? When does flex call measure ()? (When explicitHeight=NaN or explicitWidth=NaN)
30.What happens in measure()?
31.What is layoutChrome()? When does it get called?
32.You are developing a custom component and you want to use some variables that should not be exposed outside. What is the best way to do it?
Thanks,
Naveen.
