Web Development

• Web Development
  • Web development is the process of creating websites for various purposes.
  • The web is a collection of websites accessed over the Internet using a web browser.
• Websites are collections of interrelated webpages that can be accessed over the Internet.
• Benefits of websites include:
  • Information sharing
  • Facilitating online businesses
  • Facilitating e-government services
• A webpage is a web document that can store text, images, videos, and other multimedia content.
• Hypertext is used to link a webpage with other resources like another webpage, videos, images, and text.
• The World Wide Web (www) is a system of interconnected public webpages accessible over the Internet.
• Tim Berners-Lee invented the Web in 1989.
• The Web was formed out of four essential foundations: HTML, Web browser, Web server, and HTTP.

Website Design

• Website design is concerned with the plan and design of various aspects of a website, including:
  • Layout
  • Navigation
  • Appearance
  • Graphics
• Guidelines to consider when designing a website include:
  • Target audience
  • Navigation
  • Consistency
  • Simplicity
  • Accessibility

HTML

• HTML stands for HyperText Markup Language.
• HTML is used to create webpages.
• The current version of HTML is HTML5.
• HTML documents can be prepared using a simple text editor like Notepad.
• HTML documents are saved with an extension ".html".
• HTML elements are the building blocks of a webpage.
• Void elements are HTML elements that do not have end tags.
• HTML attributes are used to define more properties to HTML elements.
• HTML links are used to create hyperlinks.

Hardware Troubleshooting and Preventive Maintenance

• Hardware troubleshooting is the process of reviewing, diagnosing, and identifying technical problems within a hardware device.
• Basic procedures for checking hardware problems include:
  • Checking if the computer is plugged into a power outlet
  • Checking if everything is turned on
  • Checking if the keyboard, mouse, monitor, and speakers are properly plugged into the computer system
  • Trying a different port to check if it is a port issue
• POST (Power On Self-Test) is a part of a computer's startup program that diagnoses hardware components to ensure they are working properly.
• Beep codes are sounds emitted by the computer during POST to indicate errors.

Beep Codes

• Beep codes can indicate various problems, including:
  • No beep but the system turns on and runs fine: The "beeper" may have died out
  • No beep: The power supply is not plugged in or turned on
  • Steady, long beeps: The power supply has gone bad
  • Long, continuous beep: Issues with the RAM sticks
  • One long, two short beeps: Video card failure
• CMOS error: Stores information about time and date to system hardware settings. If a CMOS alert message appears, it indicates that the CMOS battery needs to be replaced.

Event Viewer

• Event Viewer records information about system or application errors on a computer running Windows.
• The Event Viewer records the following information:
  • The problem that occurred
  • The date and time of the problem
  • The severity of the problem
  • The source of the problem
  • The event ID number
  • Which user was logged in when the problem occurred

Basics of Preventive Maintenance

• Preventive maintenance is the practice of taking measures to reduce the risk of hardware failures.
• Methods of preventive maintenance include:
  • Cleaning the outside of the computer case using a soft cloth
  • Using chemical cleaners like alcohol-free sprays to clean screens
  • Using a vacuum cleaner to clean dust from computer components
  • Running antivirus software to prevent virus infections
  • Backing up data to external storage devices
  • Using power protection devices like surge protectors, stabilizers, and UPS to protect against electrical power problems.

This quiz covers the basics of web development, including the definition and benefits of websites, and how they are accessed over the Internet.