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Questions and Answers
What is a web browser?
What is a web browser?
A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web.
Which of the following is NOT a browser component?
Which of the following is NOT a browser component?
- Rendering engine
- Database engine (correct)
- JavaScript interpreter
- User interface
The back button in a web browser navigates to the most recently viewed page.
The back button in a web browser navigates to the most recently viewed page.
True (A)
The first web browser created by Tim Berners Lee was called __________.
The first web browser created by Tim Berners Lee was called __________.
What is the purpose of the address bar in a web browser?
What is the purpose of the address bar in a web browser?
Which browser was launched by Microsoft?
Which browser was launched by Microsoft?
Match the following web browser features with their functions:
Match the following web browser features with their functions:
What is the function of the rendering engine in a web browser?
What is the function of the rendering engine in a web browser?
Google Chrome was released in 2008.
Google Chrome was released in 2008.
Extensions for Google Chrome can be created using web technologies like __________, __________, and __________.
Extensions for Google Chrome can be created using web technologies like __________, __________, and __________.
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Study Notes
Web Browser Definition
- A web browser is a software application used to retrieve, display, and navigate information resources on the internet, commonly called a browser
Web Browser Applications
- The most common web browser application is used to display HTML documents, but can also include PDFs, images, and other web resources
- Users connect to a specific web resource via a URI (Uniform Resource Identifier)
- The W3C (World Wide Web Consortium) maintains the standards for HTML and CSS that dictate how web browsers interpret and display web content
Browser Components
- User Interface: Features like the address bar, back/forward buttons, bookmarking menus, etc.
- Browser Engine: Acts as the intermediary between the user interface and the rendering engine.
- Rendering Engine: Parses and displays the requested content; for instance, it interprets HTML and CSS to render a web page.
- Networking: Handles network communications, such as HTTP requests, using platform-independent interfaces.
- UI Backend: Responsible for drawing basic widgets, like combo boxes and windows, using a platform-independent interface.
- JavaScript Interpreter: Executes JavaScript code.
- Data Storage: Handles local data persistence, such as cookies, as well as storage mechanisms like localStorage, IndexedDB, WebSQL, and FileSystem.
Browser History
- WorldWideWeb: The first web browser, created by Tim Berners Lee in 1990.
- Mosaic: Introduced in 1993, with the added functionality of displaying images and a new graphical user interface.
- Netscape Navigator: Launched in 1994 by Marc Andreessen.
- Internet Explorer: Released in 1995 by Microsoft.
- Mozilla Firefox: Introduced in 2002.
- Safari: Launched by Apple in 2003.
- Chrome: Released by Google in 2008, one of the most widely used web browsers globally.
Basic Parts of Web Browsers
- Address Bar: Displays the URL or web address.
- Title Bar: Shows the title of the currently displayed web page.
- Menu Bar: Provides access to various menus for quick file access.
- Status Bar: Located at the bottom of the browser window, it displays information about the current activity, such as loading speed or the URL of the element the mouse hovers over.
- Display Window: The area where the web page content is displayed.
- Scroll Bars: Located on the right side of the display window, they allow navigation of the web page content when it exceeds the display window size.
Customization and Extensions
- Chrome Extensions: Small programs installed into Google Chrome that can be used to modify the browser's functionality, adding new features or changing existing behavior.
- Examples include:
- Ad-blocking
- To-do list and note-taking
- Password management
- Privacy and security enhancements
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