Flex Interview Questions And Answers

Flex Interview Questions list for experienced

  1. Types of Binding
  2. How to create your own event?
  3. Event Bubbling
  4. Life cycle of Flex Application/Component?
  5. How to implement MVC in your Application?
  6. Difference btw Java and Flex Getters Setters?
  7. How many events are fired when your focus goes in one text box, you enter some text and then press tab.?
  8. How you use styles different ways of using Style sheet?
  9. What is the difference between Flex 2.0 and Flex 3.0?
  10. How will you call Java method from Flex?
  11. What are the config files used for connecting Java and Flex?
  12. What are the channels and their types?
  13. Give the name of Collection which can be mapped to java and Flex and vice-versa?
  14. How can you access a var defined in 1 MXML flex in to another MXML file?
  15. How do you implement push on a flex applications?
  16. How do you call javascript from Flex?
  17. What are three ways to skin a component in flex?
  18. How do you use css styles in flex?
  19. What is the difference between httpService and Data Service?
  20. How can you implement Singleton in Flex Application?
  21. Give similiarities btw Java and Flex?
  22. What is adapter in Blaze DS?
  23. Explain about different types of channels available in Blaze DS?
  24. Explain about Remote Object? What is end point in Remote Object?
  25. Explain about ResultEvent and FaultEvent in Remote Object? (OR) Explain about result handler and fault handler methods?
  26. Difference between HTTP Service and Remote Object? (OR) Which one you will prefer?
  27. Explain about component life cycle?
  28. Explain about measure() method? When this measure() method is called?
  29. Difference between Item Renderer and Item Editors?
  30. How to display the Check Box in Data Grid header?
  31. Can we use Text Input/Editable component as Item Renderer?
  32. What are all the events dispatched in Item Editor?
  33. What are the collections classes available in Flex?
  34. Difference between Array and Array Collection?
  35. What type of skinning is available in Flex?
  36. What is the difference between Graphical skinning and Stateful skinning?
  37. What is CSS (Cascading Style Sheet)?
  38. Difference between SWC and SWF file?
  39. Difference between Label and Text?
  40. What is Shared Object? (OR) How to store the data in local?
  41. What is over loading? Is method over loading possible in Flex?
  42. What is composition?
  43. Difference between String and String Buffer?
  44. What are the differences between 4.6/4.5/4.0 and Flex 3.0?
  45. Difference between Flash and Flex?

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Top Flex interview questions and answers for freshers and experienced

What is Flex ?

Answer :

Questions : 1 :: Types of Binding

Using the curly braces ({}) syntax Using ActionScript expressions in curly braces Using the tag in MXML Using bindings in ActionScript(BindingUtils)

Questions : 2 :: How to create your own event?

Creating a subclass from the Event class Using the Event metadata tag Dispatching an event

Questions : 3 :: Event Bubbling


The mechanism through which event objects are passed from the objects that generates an event up through the containership hierarchy

Questions : 4 :: Life cycle of Flex Application/Component?

Preinitialize: The application has been instantiated but has not yet created any child components. Initialize: The application has created child components but has not yet laid out those...View answers

Questions : 5 :: How to implement MVC in your Application?

Cairngorm is based on the MVC model. It is specifically designed to facilitate complex state and data synchronization between the client and the server, while keeping the programming of the View...View answers

Questions : 6 :: Difference btw Java and Flex Getters Setters?


When it comes to getters and setters, Java and AS are quite different, in that getters and setters are part of the core ECMAScript language, whereas in Java, getters and setters are done through a...View answers

Questions : 7 :: How many events are fired when your focus goes in one text box, you enter some text and then press tab.?

PreinitializeHandler(), initializeHandler(), itemEditBegin, itemEditEnd, creationComplete()

Questions : 8 :: How you use styles different ways of using Style sheet?

Using external style sheets, Using local style definitions, Using the StyleManager class ,Using the setStyle() and getStyle() methods, Using inline stylesLoading style sheets at run time

Questions : 9 :: What is the difference between Flex 2.0 and Flex 3.0?


Enhanced Features like Faster compilation time, SWF file size reduction, Flex/Ajax bridge, Advanced Datagrid, Interactive debugging, Cross-Domain, Versionable, Easy to Use,Security and Code...View answers

Questions : 10 :: How will you call Java method from Flex?

Using RemoteObject. Explain the process to interviewer

Questions : 11 :: What are the config files used for connecting Java and Flex?

data-management-config.xml, messaging-config.xml, proxy-config.xml, remoting-config.xml,...View answers

Questions : 12 :: What are the channels and their types?

The Channel class is the base message channel class that all channels in the messaging system must extend. Channels are specific protocol-based conduits for messages sent between MessageAgents and...View answers

Questions : 13 :: Give the name of Collection which can be mapped to java and Flex and vice-versa?

java.lang.String String java.lang.Boolean, boolean Boolean java.lang.Integer, int int java.lang.Short, short int java.lang.Byte, byte[] int java.lang.Byte[] flash.utils.ByteArray java.lang.Double,...View answers

Questions : 14 :: How can you access a var defined in 1 MXML flex in to another MXML file?

Create 1 object of MXML fiel into another MXML File

Questions : 15 :: How do you implement push on a flex applications?

Messaging systems let separate applications communicate asynchronously as peers by passing packets of data called messages back and forth through a Message Service. A message usually consists of a...View answers

Questions : 16 :: How do you call javascript from Flex?

:flash.external.ExternalInterface.call(function_name: String[, arg1, …]):Object;

Questions : 17 :: What are three ways to skin a component in flex?

Graphical skins: Images that define the appearance of the skin. These images can JPEG, GIF, or PNG files, or they can be symbols embedded in SWF files. Typically you use drawing software such as...View answers

Questions : 18 :: How do you use css styles in flex?

Using external style sheets, Using local style definitions, Using the StyleManager class ,Using the setStyle() and getStyle() methods, Using inline stylesLoading style sheets at run time.

Questions : 19 :: What is the difference between httpService and Data Service?

The Flex presentation layer communicates with the business layer by using Flex data services, which are objects you insert in a Flex file. Specifically, you can use Flex data services to interact...View answers

Questions : 20 :: How can you implement Singleton in Flex Application?

If you are a Java Programmer dont be mistaken by saying create Private Constructor. We cant create private Constructor in Flex

Questions : 21 :: Give similiarities btw Java and Flex?

Both are object Oriented, Encapsulation, Inheritance, Abstraction and Polymorphism are implemeted in both of the technologies. *The package like imports *Availability of Classes in the scripting...View answers

Questions : 22 :: What is adapter in Blaze DS?

Java Adapter is used to communicate with Java and JMS adapter is used to communicate with JMS. Java adapter class allows us to invoke methods on a Java object.

Questions : 23 :: Explain about different types of channels available in Blaze DS?

     HTTP Channel, AMF Channel, RTMP Channel.             AMF Channel: A simple channel endpoint that transport data over HTTP...View answers

Questions : 24 :: Explain about Remote Object? What is end point in Remote Object?

Remote Object:  Remote Service automatically serializes and deserializes the data between Flex client and your server side language. As a result, you can directly call methods on your...View answers

Questions : 25 :: Explain about ResultEvent and FaultEvent in Remote Object? (OR) Explain about result handler and fault handler methods?

result: This is the event listener for the event ResultEvent. This event is automatically dispatched by the Flash Player when it receives the successful results from the backend Java...View answers

Questions : 26 :: Difference between HTTP Service and Remote Object? (OR) Which one you will prefer?

 Data Service(Remote Object)             1. Remote Objects specifies named or unnamed...View answers

Questions : 27 :: Explain about component life cycle?

   The component instantiation life cycle describes the sequence of steps that occur when you create a component object from a component class. As part of the life cycle, Flex automatically...View answers

Questions : 28 :: Explain about measure() method? When this measure() method is called?

The measure() method sets the default component size, in pixels, and optionally sets the component's default minimum size.            ...View answers

Questions : 29 :: Difference between Item Renderer and Item Editors?

 Both are used for editing,but item renderer is used for displaying visual elements..             item editor is used for editing purpose....View answers

Questions : 30 :: How to display the Check Box in Data Grid header?

<mx:DataGridColumn headerText="ADD" dataField="add"     itemRenderer="mx.controls.Button"/>            ...View answers

Questions : 31 :: Can we use Text Input/Editable component as Item Renderer?

Yes,

Questions : 32 :: What are all the events dispatched in Item Editor?

  Item Edit Beginning, Item Edit Begin, Item Edit End

Questions : 33 :: What are the collections classes available in Flex?

Array Collection, XML List Collection, Grouping Collection.

Questions : 34 :: Difference between Array and Array Collection?

1) Array Collection is a wrapper class based on Array.             2) Array Collection contains sorting, filtering features but Array...View answers

Questions : 35 :: What type of skinning is available in Flex?

Graphical skinning, Programmatic Skinning and Stateful skinning.             Graphical Skins: Images that define the appearance of the skin....View answers

Questions : 36 :: What is the difference between Graphical skinning and Stateful skinning?

Sateful Skins: A type of programmatic skin that uses view states, where each view state corresponds to a state of the component. The definition of the view state controls the look of the skin. Since...View answers

Questions : 37 :: What is CSS (Cascading Style Sheet)?

Cascading Style Sheets (CSS) are used in Flex to apply styles to visual components on the application display list. CSS is a standard for encapsulating the code that makes up the design of an...View answers

Questions : 38 :: Difference between SWC and SWF file?

SWC file is a library file and SWF file is a runnable file. We will copy to Flex Projects libs folder.             SWC is what you use when...View answers

Questions : 39 :: Difference between Label and Text?

Label: If you explicitly size a label control so that it is not large enough to accommodate it's text the text is truncated and terminated by an...View answers

Questions : 40 :: What is Shared Object? (OR) How to store the data in local?

Shared objects function like browser cookies. The SharedObject class to store data on the user's local hard disk and call that data during the same session or in a later session. Applications can...View answers

Questions : 41 :: What is over loading? Is method over loading possible in Flex?

No. Method overloading is not supported in Action Script3.0.

Questions : 42 :: What is composition?

 Making use of the already created class functionality or behaviour by instantiating the class and calling the required methods.

Questions : 43 :: Difference between String and String Buffer?

String is immutable and String Buffer is mutable. String class creates new instance for any method but String Buffer updates/modifies same instance.

Questions : 44 :: What are the differences between 4.6/4.5/4.0 and Flex 3.0?

4.5 and 4.6 are used for developing mobile based applications. 4.6 has few new components.             4.0: 1) Spark components have been...View answers

Questions : 45 :: Difference between Flash and Flex?

Flash is used by the designers. Flex is used by the developers. Flash uses only Flash Player API but Flex uses both Flash Player API and Flex SDK library also. like datavisualization.swc,...View answers
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