Which type of software is most commonly set as the default application to open a file named index.html in MS Windows when double-clicked?

Correct option is D

When a file named index.html is double-clicked in Microsoft Windows, it is most commonly opened using a web browser. This is because .html files contain HyperText Markup Language, which is designed to be interpreted and rendered by web browsers like Chrome, Edge, or Firefox. The browser reads the HTML code and displays it as a formatted web page, rather than showing the raw text. Hence, a web browser is set as the default application for opening HTML files.
Important Key Points:
1. What is an index.html file? It is an HTML file, often used as the default homepage of a website.
2. Role of a Web Browser: Browsers interpret HTML tags and display structured content such as text, images, links, and layouts.
3. Default File Association in Windows: Windows associates .html and .htm extensions with a web browser by default.
4. Common Web Browsers: Microsoft Edge, Google Chrome, Mozilla Firefox, Safari.
5. Why not a text editor by default? Although HTML can be edited in a text editor, it is meant to be viewed in a browser.
6. Practical Example: Double-clicking index.html opens a webpage preview instantly in the browser.
Knowledge Booster:
· Why option (a) Word Processor is incorrect? Word processors are meant for documents, not for rendering web pages.
· Why option (b) Text Editor is incorrect? Text editors show raw HTML code; they are used for editing, not default viewing.
· Why option (c) Spreadsheet is incorrect? Spreadsheets handle numerical/tabular data, not web content.