Flex Interview Script

Basic

How would you call a javascript method from a Flex App and vice-versa? ( By Using IExternalInterface)
Explain the UIComponent lifecycle, including important methods like initialize(), createChildren(), etc. (http://www.billdwhite.com/wordpress/?p=21)
Name three different ways to achieve data binding ({} brackets in MXML, BindingUtils, ChangeWatcher)
Explain the bubbling and capturing phases in event model in Flash. Explain what a weak-referenced event listener is and why you'd use it. (http://livedocs.adobe.com/flex/3/html/help.html?content=events_08.html)
By default, which phase is an event captured in Flex(Bubbling.)
How to force an event to be captured in capturing phase?( Set 'useCapture' property of the event to 'true')
Where would you use a classfactory? ( While defining itemrenderers. Classsfactory is used to instantiate a class object given a classname as parameter)
How do you dispatch events from an ActionScript class ( By implementing IEventDispathcer or extending EventDispatcher. MXML components already extend EventDispatcher class)

Given a Function object 'myfunc' how would you execute it ( myfunc.apply() or myfunc.call())
Difference between apply and call ( With apply, the first argument to apply is 'this', the object on which the function will be executed)
If 'myfunc' accepts two string arguments, then ? ( myfunc.call(arg1, arg2) )
Can you set properties of a new object by using classfactory( Yes.Pass another parameter in this form - {prop1: val1, prop2:val2} to set prop1 and prop2 properties of the object while instantiation through classfactory.
Create an ItemRenderer for a datagrid column that will color the background of the column cell as blue or white, if the data in cell is less than or greater than 10 respectively. ( Implement IDropinListItemRenderer and in updateDisplayList read 'data' property and paint a blue/white background based on the 'data' value)

Design a Mail App ( using a framework like Mate, Cairngorm, Robotlegs etc. or whatever you are familiar with)

Service Methods that you can invoke on the Java backend: ->

Message object is defined as ->

Message : { id: 12, content: 'Some Content', from: [email protected] }

Evaluate on->

Object Modelling - (Should be able to create separate screen components, maybe re-use)
Design Patterns - Use of well know MVC, Command etc. patterns to tie together screens and business logic.
Service Calls

###References

==> Shantanu