Computer GK Notes

Computer GK Notes

omputer GK – Category Wise (Exam-Oriented)

🖥️ 1. Parts of Computer

  • Input devices are used to enter data into a computer.
  • Output devices are used to display results from a computer.
  • CPU is known as the brain of the computer.
  • ALU performs arithmetic and logical operations.
  • Control Unit controls all operations of the computer.
  • RAM is volatile memory.
  • ROM is non-volatile memory.
  • Hard disk is a permanent storage device.

🧠 2. Hardware

  • Hardware refers to physical components of a computer.
  • Keyboard is an input device.
  • Mouse is a pointing device.
  • Monitor is an output device.
  • Motherboard is the main circuit board.
  • Printer is an output device used for printing documents.

💾 3. Software

  • Software is a set of instructions for a computer.
  • System software manages computer hardware.
  • Application software performs specific tasks.
  • Operating system is system software.
  • Windows is an example of operating system.
  • Antivirus is utility software.

📊 4. Microsoft Office

  • MS Word is used for word processing.
  • MS Excel is used for spreadsheets and calculations.
  • MS PowerPoint is used for presentations.
  • MS Access is used for database management.
  • MS Outlook is used for email services.

🌐 5. Internet

  • Internet is a global network of computers.
  • WWW stands for World Wide Web.
  • Web browser is used to access websites.
  • Google is a search engine.
  • Email stands for electronic mail.
  • URL is the address of a website.
  • Download means receiving data from the internet.
  • Upload means sending data to the internet.

🔗 6. Networking

  • LAN stands for Local Area Network.
  • MAN stands for Metropolitan Area Network.
  • WAN stands for Wide Area Network.
  • Router connects multiple networks.
  • Modem connects a computer to the internet.
  • IP address is the unique address of a device.
  • DNS converts domain names into IP addresses.

🚀 7. Supercomputer

  • Supercomputer is the fastest computer.
  • It is used in weather forecasting and scientific research.
  • PARAM series is India’s supercomputer project.
  • Supercomputers have very high processing speed.

🔐 8. Computer Security

  • Virus is a harmful program.
  • Antivirus protects a computer from viruses.
  • Firewall protects networks from unauthorized access.
  • Malware is malicious software.
  • Phishing is a cyber fraud technique.
  • Encryption is used to secure data.
  • Password is used for security access.

💡 Exam Tip Style

  • CPU → Brain of computer
  • RAM → Volatile memory
  • LAN → Small area network
  • WWW → Collection of websites
  • Virus → Harmful software

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