Question

Select the JavaScript object model that represents an HTML document as a tree structure and supports dynamic updates

• A. DOM
• B. CLR
• C. BOM
• D. URL

Answer 1

Answer:

A. DOM

Document Object Model (DOM)

• The Document Object Model (DOM) is a cross-platform and language-independent interface that treats an HTML or XML document as a tree structure.
• Each node in the tree represents a part of the document, such as an element, attribute, or text content.
• Key Characteristics:
  • Tree Representation: The document is organized hierarchically, starting with the root element (usually <html>).
  • Dynamic Updates: It allows programs (primarily JavaScript) to dynamically access, modify, add, or delete document content, structure, and style in real-time without reloading the page.
  • Event Handling: The DOM supports event-driven programming, enabling interactivity based on user inputs like clicks, keyboard presses, or mouse movements.
• Standards: The DOM is standardized by the W3C (World Wide Web Consortium) to ensure consistency across different web browsers.
• Core API Methods: Developers often use methods like getElementById(), querySelector(), and createElement() to manipulate the DOM tree efficiently during runtime.