ActionScript Questions and Answers for Viva

Answer-1: ActionScript is an object-oriented programming language used primarily for developing Adobe Flash applications and animations.

Answer-2: ActionScript 2.0 introduced object-oriented programming features like classes and interfaces.

Answer-3: ActionScript 3.0 is faster, more powerful, and strictly typed compared to ActionScript 2.0. It also has a different runtime model.

Answer-4: The basic data types include Number, String, Boolean, int, uint, and Object.

Answer-5: Variables are defined using the var keyword, e.g., var myVar:String = "Hello";.

Answer-6: The stage property represents the main drawing area and root container for display objects.

Answer-7: The Event Model is a system for handling user interactions and system-generated events using listeners and dispatchers.

Answer-8: A display object is an object that can be displayed in the Flash runtime, such as Sprite, MovieClip, or Shape.

Answer-9: A class is created using the class keyword, e.g., public class MyClass { }.

Answer-10: The addChild method adds a display object to the display list.

Answer-11: The stop method halts the playback of a MovieClip at its current frame.

Answer-12: gotoAndStop moves to a specific frame and stops, while gotoAndPlay moves to a frame and continues playing.

Answer-13: A MovieClip is a timeline-based container used for animations and interactivity.

Answer-14: The Loader class is used to load external content like images or SWF files into a Flash application.

Answer-15: Strict typing enforces declaring variables with specific data types to catch errors at compile time.

Answer-16: Inheritance is achieved using the extends keyword, e.g., class ChildClass extends ParentClass.

Answer-17: The addEventListener method attaches an event listener to an object to handle specific events.

Answer-18: The enterFrame event is dispatched on every frame of the Flash timeline, useful for animations.

Answer-19: Filters like DropShadowFilter or BlurFilter are visual effects that can be applied to display objects.

Answer-20: Sprite has no timeline and is lightweight, while MovieClip has a timeline for animations.

Answer-21: Errors are handled using try, catch, and finally blocks.

Answer-22: The Sound class is used to load and control sound files.

Answer-23: An interface is declared using the interface keyword, e.g., public interface MyInterface { }.

Answer-24: A dynamic class allows properties to be added or removed at runtime.

Answer-25: The Timer class is used to create and manage timed events.

Answer-26: RSLs are external libraries that can be loaded at runtime to reduce SWF file size.

Answer-27: The Graphics class provides methods for drawing shapes and lines dynamically.

Answer-28: An anonymous function is a function without a name, often used as an inline event handler.

Answer-29: private restricts access to within the class, while protected allows access in subclasses.

Answer-30: External XML can be loaded using the URLLoader and XML classes.

Answer-31: ExternalInterface enables communication between ActionScript and JavaScript in a web browser.

Answer-32: The Bitmap class represents a display object for images and bitmap data.

Answer-33: Garbage collection is the automatic process of reclaiming unused memory by the Flash runtime.

Answer-34: stage.scaleMode controls how the Flash content scales in the player window.

Answer-35: Shared objects are used for local data storage, similar to cookies in web development.

Answer-36: Fonts can be embedded using the [Embed] metadata tag or via Flash IDE settings.

Answer-37: The TextField class is used to create and manage text fields in Flash applications.

Answer-38: Polymorphism is implemented through method overriding and dynamic binding.

Answer-39: The NetStream class is used to stream audio, video, and data over a network.

Answer-40: Debugging can be done using trace statements, the Flash Debugger, or external tools like FlashDevelop.

Answer-41: The MouseEvent class handles mouse events like clicks, moves, and hovers.

Answer-42: Timer is an ActionScript class with more control, while setInterval is a simpler global function.

Answer-43: The URLRequest class is used to request data from external URLs.

Answer-44: Metadata tags like [Embed] or [Inspectable] provide additional information to the compiler or runtime.

Answer-45: The Vector class is a type-safe array with better performance than regular arrays.

Answer-46: Keyboard events are handled using the KeyboardEvent class and the addEventListener method.

Answer-47: The Security class controls security settings for Flash applications, such as sandbox restrictions.

Answer-48: A runtime error occurs during the execution of the program, such as null reference or type mismatch errors.

Answer-49: The Stage object represents the main drawing surface for the Flash Player.

Answer-50: Reusable components can be created using custom classes and MovieClips in the Flash IDE.