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Action Script Interview Questions & Answers - Learning Mode
COOLINTERVIEW.COM WEB INTERVIEW QUESTIONS ACTION SCRIPT INTERVIEW QUESTIONS QUESTIONS & ANSWERS - LEARNING MODE

Action Script Interview Questions & Answers - Learning Mode

ActionScript is an object-oriented programming (OOP) language that is designed specifically for Web site animation. Originally released with Macromedia Flash 4 and enhanced for Flash 5, ActionScript is a sophisticated version of the script language introduced in Flash 3. ActionScript is an object-oriented programming language originally developed by Macromedia Inc. (since merged into Adobe Systems). It is a derivation of HyperTalk, the scripting language for HyperCard.

Try Action Script Interview Questions & Answers - Exam Mode

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Action Script Interview Questions & Answers - Learning Mode
Try Action Script Interview Questions & Answers - Exam Mode
Question: What is dynamic keyword used for in actionscript?

Answer: Dynamic classes, which allow you to programmatically add new properties and behavior to classes during the run-time. Just add the magic keyword dynamic to the class definition:
dynamic class Person {
var name:String;
}

Now let?s add dynamically two variables name and age and the function printme() to the object of type Person:

Person p= new Person();
p.name=?Joe?;
p.age=25;
p.printMe = function () {
trace (p.name, p.age);
}
p.printMe(); // Joe 25 Source: CoolInterview.com
Question: How do you implement push with flex data services?

Answer: Using Blaze DS Server & LCDS Source: CoolInterview.com
Question: What is a drag manager in adobe flex actionscript?

Answer: The Flex Drag and Drop Manager lets you select an object, such as an item in a List control, or a Flex control, such as an Image control, and then drag it over another component to add it to that component. Source: CoolInterview.com
Question: How do we use css styles in flex?

Answer: External styles are defined in a separate file and can be used in any MXML file that references the CSS file. You reference a CSS file into an MXML file with the source property of the <mx:Style> tag, as follows:
<mx:Style source="../siteStyles.css"/>
Embedded styles are defined in an MXML file and can only be used in that file. Embedded styles are defined with the <mx:Style> tag, as follows:
<mx:Style>
.myclass { background-color: xFF0000 }
TextInput { fon Source: CoolInterview.com
Question: How do I run Flex as a service?

Answer: Flex is not a server that you deploy and run. It is simply deployed as part of your web application. So it will work, no matter which web container you are using: Tomcat, JRun 4, WebLogic, and so forth. To learn how to deploy Tomcat, JRun 4, or any other Java server as a service, refer to the appropriate documentation for the server you are using. Source: CoolInterview.com
Question: How do I pass parameters to a pop-up window in actionscript?

Answer: Three different ways to pass data into a title window.

It uses the initobj to pass in several built-in properties plus two user defined properties.

One is a simple string, the other is a reference to the main application that can be used for binding. Note the variable that holds the application reference is typed to the name of the application. this is critical for binding to work correctly. Source: CoolInterview.com
Question: When I add or modify an item in my dataProvider, why does not it show up in my DataGrid?

Answer: Low-level methods like Array.push() or myArray[0] = "whatever" do not cause the dataProvider's modelChanged event to fire.
When you work with a dataProvider, it is always best to use the dataProvider API. In the above example, you might code: myDataProvider.addItem(myItemObject) to add an item or use editField() to modify a value programmatically.
Alternatively, you can call myDataProvider.modelChanged yourself or reassign dataProvider to the control, as follows: myDataGrid.dataProvide Source: CoolInterview.com
Question: Is double-clicking supported on various components?

Answer: Unfortunately, double-clicking is not supported by default. If you wish to add this functionality to, say, a List or DataGrid component, you will have to add the following ActionScript 2.0 code to your application:
var someTimestamp:Number;
public function doubleClickHandler( evt:Object ):Void {
var now = getTimer();
// we got a double-click
if( ( now - someTimestamp ) < 500 ) {
// do something here ...
}
someTimestamp = now;
} Source: CoolInterview.com
Question: Can you write to the file system from flex?

Answer: Yes .
import flash.filesystem.*;
private var stream:FileStream;
private function saveFile():void{
var file:File = File.desktopDirectory.resolvePath("HelloWorld.txt");
var stream:FileStream = new FileStream()
stream.open(file, FileMode.WRITE);
var str:String = "Congratulations on your 1st file, Rich Tretola - EverythingFlex.com";
stream.writeUTFBytes(str);
stream.close();
mx.controls.Alert.show("File has been saved to " + file.nativePath, "Notice"); Source: CoolInterview.com
Question: myTree appears just fine but why ca not I access the node attributes?

Answer: Select a node in your myTree. In ActionScript, you can reference this node by using the following code: myTree.selectedNode;
To access the attributes of the node, use the tree DataProvider API. These methods will work for any format dataProvider item, which might be an object, array, or XML node.
The following example might work: myTree.selectedNode.attributes.myAttribute
But the following example is far more reliable:
myTree.selectedNode.getProperty("myAttribute"); Source: CoolInterview.com
Question: What is the dynamic keyword used for in flex actionscript?

Answer: Specifies that instances of a class may possess dynamic properties added at runtime. If you use the dynamic attribute on a class, you can add properties to instances of that class at runtime. Classes that are not marked as dynamic are considered sealed, which means that properties cannot be added to instances of the class. Source: CoolInterview.com
Question: Can I load CSS style sheets dynamically at runtime?

Answer: Dynamic loading of CSS files is not supported in Flex. CSS in Flex is processed on the server side during MXML compilation rather than on the client side at runtime. There is a trick though: A CSS file can be compiled into a separate SWF file and loaded dynamically into the application using the Loader component. Source: CoolInterview.com
Question: What design patterns have you used? in Actionscript and java?

Answer: 1. Creational Pattern
* Factory Method Pattern
* Singleton Pattern

2. Structural Patterns
* Decorator Pattern
* Adapter Pattern

* Coposite Pattern
3. Behavioral Patterns
* Command Pattern
* Observer Pattern
* Template Metod Pattern
* State Pattern
* Strategy Pattern

4. Multiple Patterns
* MVC Pattern
* Symetric Proxy Pattern Source: CoolInterview.com
Question: What does calling preventDefault() on an event do? How is this enforced?

Answer: Cancels an event's default behavior if that behavior can be canceled.. For example, the doubleClick event has an associated default behavior that highlights the word under the mouse pointer at the time of the event. Your event listener can cancel this behavior by calling the preventDefault() method.
You can use the Event.cancelable property to check whether you can prevent the default behavior associated with a particular event. If the value of Event.cancelable is true, then preventDefaul Source: CoolInterview.com
Question: How do I get access to the J2EE session from my RemoteObjects?

Answer: The AMF Gateway provides access to the current HttpServletRequest instance in a thread local variable. The session can be obtained from the request, as follows:
flashgateway.Gateway.getHttpRequest().getSession(); Source: CoolInterview.com
Question: Can I dynamically instantiate a WebService or HTTPService in ActionScript?

Answer: Flex 1.5 does not support this. First declare the tags in MXML and then manipulate the URLs, request objects, and so forth using ActionScript. Source: CoolInterview.com
Question: How do you implement push on a flex applications?

Answer: Using BlazeDS Server, LiveCycle Data Services Source: CoolInterview.com
Question: Why are my ValueObject member variables undefined in the results from my RemoteObject requests?

Answer: Flash Player deserializes objects in a special order that can confuse developers used to object serialization from other RPC systems. When a strongly typed object is returned to the player, it first creates an instance from the prototype of the registered class without calling the constructor. It then populates the object with the properties sent in the result. Finally, it calls the constructor without arguments.

If your ValueObject constructor expects arguments to initialize an instance, Source: CoolInterview.com
Question: I am going to add images into a tag. How will it resize itself in adobe flex actionscript?

Answer: To let Flex resize the image as part of laying out your application, set the height or width properties to a percentage value. Flex attempts to resize components with percentage values for these properties to the specified percentage of their parent container.

Or by default, Flex does not resize the image. The scaleContent property has a default value of true, therefore, Flex scales the image as it resizes it to fit the specified height and width. The aspect ratio is maintained by default Source: CoolInterview.com
Question: What are the similarities between java and flex?

Answer: Both can be used as client application, both have packages, OOP based , support XML , import external packages, up casting, support ArrayCollection ,almost same primitive data types, both support class library packaging( .jar , .swc). Source: CoolInterview.com

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