Flash ActionScript and SWF Development

Among basic geometric shapes in Flash, a circle typically renders as the lightest symbol in terms of file size and complexity. Circles have fewer anchor points and simpler path definitions compared to rectangles, triangles, or squares, making them more lightweight. This affects both file size and rendering performance.

In Flash, you can attach symbols to buttons or movie clips, and the option 'Symbol and Sound' correctly identifies a common combination for interactive elements. Flash allows attaching both visual symbols and audio elements to create rich interactive experiences. The other combinations either omit critical elements or mix incompatible types.

The Load Movie action in Flash is specifically designed to load external SWF files and image files (like JPEG, PNG) into the current movie. While Flash can work with audio, the Load Movie command itself does not load audio files - those are loaded using different actions like Load Sound. Option A correctly identifies the supported file types.

Among the listed formats, PNG typically has the highest compression efficiency in Flash, especially for images with large areas of solid color or vector-like graphics. Flash's PNG compression is very effective for web graphics. JPEG uses lossy compression, BMP is uncompressed, and GIF is limited to 256 colors, making PNG superior for many Flash applications.

When you publish a Flash movie, the ActionScript code (.as files) is compiled into the SWF file. The SWF is a standalone file that contains all necessary bytecode and assets, so it runs perfectly without the original .as files. The source files are only needed during development and for recompilation if you want to make changes.

In Flash ActionScript, _level0 always refers to the main movie timeline at level 0 of the Flash Player, regardless of which SWF you're in. The _root property, however, is relative to each SWF's own main timeline. When 1.swf is loaded into 2.swf, _root in 1.swf refers to 1.swf's timeline, while _level0 remains the same global reference for both.

A movie clip is an instance of the MovieClip class in Flash. While MovieClip is the class itself, the actual movie clips you use on stage are instances created from that class. Options A and C describe class relationships incorrectly, and option D references a non-existent swf class.

In ActionScript, the removeMovieClip() function only works on movie clip instances that were created dynamically at runtime (e.g., using attachMovie or duplicateMovieClip). Author-time timeline instances cannot be directly removed this way.

Shared Objects in Flash are objects created by SWF files that can store data locally on the user's system (similar to cookies). They persist between sessions and allow data to be saved and retrieved. They are not library sharing mechanisms, class-to-class sharing, or property-sharing objects.

Flash supports a limited subset of HTML tags, primarily basic formatting tags like , , , , , and

. Structural tags like

XML files are commonly used with Flash/SWF files to read external data into the application. While XML can technically both read and write data, the option states 'Read data' as the correct answer, which aligns with the most common use case. Flash applications primarily consume XML data to populate content dynamically.

When a SWF file loads data from an external XML file, it reads that data at runtime. If the XML file is deleted after the SWF is published, the SWF cannot access the data source, so the data will not be displayed. The SWF itself remains functional but cannot show the XML-dependent content.