💻 Computer Study Guide for Exams
1. Basics of Computer
- Definition: Electronic machine that processes data
- Full Form of Computer: Common Operating Machine Purposely Used for Technological and Educational Research (not official but commonly asked)
- Components:
- Input → Keyboard, Mouse
- Processing → CPU
- Output → Monitor, Printer
2. Generations of Computer
- First Generation – Vacuum Tubes
- Second Generation – Transistors
- Third Generation – IC (Integrated Circuits)
- Fourth Generation – Microprocessors
- Fifth Generation – Artificial Intelligence
3. CPU (Central Processing Unit)
- Brain of computer
- Parts:
- ALU (Arithmetic Logic Unit)
- CU (Control Unit)
- Registers
4. Memory (Important for Exams)
Primary Memory
- RAM (Volatile)
- ROM (Non-volatile)
Secondary Memory
- Hard Disk
- Pen Drive
- CD/DVD
👉 Units:
- Bit → Byte → KB → MB → GB → TB
5. Input & Output Devices
Input
- Keyboard
- Mouse
- Scanner
- Microphone
Output
- Monitor
- Printer
- Speaker
6. Software
System Software
- Windows Operating System
- Linux Operating System
Application Software
- Microsoft Word
- Microsoft Excel
- Microsoft PowerPoint
7. Operating System (OS)
- Acts as interface between user and hardware
- Functions:
- File management
- Memory management
- Process management
Examples:
- Windows 10
- macOS
- Android
8. Internet & Networking
- Internet = Global network
- WWW = Web system
- Browser Examples:
- Google Chrome
- Mozilla Firefox
👉 Terms:
- IP Address
- HTTP / HTTPS
9. MS Office (Very Important)
- Word → Document
- Excel → Calculations
- PowerPoint → Presentation
Shortcut keys (Important):
- Ctrl + C → Copy
- Ctrl + V → Paste
- Ctrl + S → Save
10. Cyber Security
- Virus
- Antivirus
- Malware
- Phishing
11. Important Full Forms
- CPU – Central Processing Unit
- RAM – Random Access Memory
- ROM – Read Only Memory
- USB – Universal Serial Bus
- URL – Uniform Resource Locator
🎯 Exam Tips
- Focus on MCQs + previous year questions
- Practice shortcuts & full forms daily
- Revise basic concepts (RAM, CPU, OS)