SEBA Class 9 Computer Science Chapter 1 Question Bank | Basics of Computer System

Computer Guide Team
June 22, 2026
Class IX Chapter 1 Question Bank
⭐ Very Short Answer Questions
Q1. What is a Computer?
Answer: A computer is an electronic device that accepts data, processes it and produces meaningful information.
Q2. What is Data?
Answer: Data refers to raw facts and figures that have not yet been processed.
Q3. What is Information?
Answer: Information is processed data that is meaningful and useful.
Q4. Who is known as the Father of Computer?
Answer: Charles Babbage is known as the Father of Computer.
Q5. What is CPU?
Answer: CPU (Central Processing Unit) is the brain of the computer.
📝 Short Answer Questions
Q6. Differentiate between Data and Information.
Answer:
Data: Raw facts and figures.
Information: Processed and meaningful data.
Q7. Write any four characteristics of a Computer.
Answer:
  • Speed
  • Accuracy
  • Diligence
  • Storage Capacity
Q8. What is RAM?
Answer: RAM (Random Access Memory) is temporary memory used to store data and instructions currently being processed.
Q9. What is ROM?
Answer: ROM (Read Only Memory) is permanent memory that stores essential instructions required to start a computer.
📚 Long Answer Questions
Q10. Explain the Need of Computer Education.
Answer: Computer education is essential because computers are used in almost every field such as education, banking, business, healthcare and communication. It improves digital literacy, increases job opportunities, develops research skills and helps people use technology effectively.
Q11. Explain the Five Generations of Computers.
Answer:
  1. First Generation: Vacuum Tubes (1939–1954)
  2. Second Generation: Transistors (1955–1964)
  3. Third Generation: Integrated Circuits (1965–1975)
  4. Fourth Generation: Microprocessors (1976–Present)
  5. Fifth Generation: Artificial Intelligence (Present & Beyond)
Q12. Explain the Components of a Computer System.
Answer: The main components of a computer system are:
  • Input Unit
  • CPU (ALU, CU and Registers)
  • Memory Unit
  • Output Unit
These components work together to process data and generate information.
Q13. Differentiate between Hardware and Software.
Answer:
Hardware Software
Physical parts of a computer. Programs and instructions.
Can be touched. Cannot be touched.
Example: Keyboard, Monitor. Example: Windows, MS Word.
🎤 Viva Questions
Q16. Who is known as the Father of Computer?
Answer: Charles Babbage is known as the Father of Computer.
Q17. What does CPU stand for?
Answer: CPU stands for Central Processing Unit.
Q18. What is the brain of a computer?
Answer: CPU is called the brain of a computer.
Q19. Which memory is temporary?
Answer: RAM is temporary memory.
Q20. Which memory is permanent?
Answer: ROM is permanent memory.
✍ Fill in the Blanks
1. A computer is an __________ device.
Answer: Electronic
2. Charles Babbage is known as the __________ of Computer.
Answer: Father
3. The brain of a computer is called __________.
Answer: CPU
4. RAM is a __________ memory.
Answer: Volatile
5. ROM is a __________ memory.
Answer: Non-Volatile
6. 8 bits make one __________.
Answer: Byte
7. Keyboard is an __________ device.
Answer: Input
8. Monitor is an __________ device.
Answer: Output
✅ True or False
1. Computer is an electronic device.
Answer: True
2. RAM is permanent memory.
Answer: False
3. ROM is volatile memory.
Answer: False
4. Keyboard is an output device.
Answer: False
5. Monitor is an output device.
Answer: True
6. CPU is called the brain of a computer.
Answer: True
7. Hardware can be touched physically.
Answer: True
8. Software is a physical part of a computer.
Answer: False
9. Data processing converts data into information.
Answer: True
10. Windows is system software.
Answer: True
🎯 Most Important Exam Questions
Q1. Explain the characteristics of a Computer.
Answer: The main characteristics of a computer are:
  • Speed: Performs millions of calculations in seconds.
  • Accuracy: Produces accurate results when given correct data.
  • Diligence: Can work continuously without getting tired.
  • Storage: Stores large amounts of data.
  • Versatility: Can perform different types of tasks.
Q2. Explain the evolution of Computers from Abacus to Modern Computers.
Answer: The evolution of computers started with Abacus, followed by Napier's Bones, Pascal's Adding Machine, Leibniz Calculator, Jacquard Loom, Difference Engine, Analytical Engine, Hollerith Machine and finally modern electronic computers.
Q3. Explain the five generations of Computers.
Answer:
  1. First Generation – Vacuum Tubes
  2. Second Generation – Transistors
  3. Third Generation – Integrated Circuits (ICs)
  4. Fourth Generation – Microprocessors
  5. Fifth Generation – Artificial Intelligence
Q4. Draw and explain the block diagram of a Computer System.
Answer: The main units of a computer system are:
  • Input Unit
  • CPU (ALU, CU and Registers)
  • Memory Unit
  • Output Unit
The input unit accepts data, CPU processes it, memory stores it and output unit displays the results.
Q5. Differentiate between RAM and ROM.
Answer:
RAM ROM
Temporary Memory Permanent Memory
Volatile Non-Volatile
Read and Write Mainly Read Only
Q6. Differentiate between Hardware and Software.
Answer:
Hardware Software
Physical parts of a computer. Programs and instructions.
Can be touched. Cannot be touched.
Examples: Keyboard, Mouse. Examples: Windows, MS Word.
Q7. Explain the types of Software with examples.
Answer: Software is mainly of two types:
  • System Software: Operating System, Device Drivers.
  • Application Software: MS Word, Excel, PowerPoint, Browser etc.
Q8. Explain the different types of Input Devices.
Answer: Input devices are used to enter data into the computer. Examples are:
  • Keyboard
  • Mouse
  • Scanner
  • Microphone
  • Web Camera
Q9. Explain the different types of Output Devices.
Answer: Output devices are used to display processed information. Examples are:
  • Monitor
  • Printer
  • Speaker
  • Projector
  • Plotter
Q10. Explain the importance of Computer Education.
Answer: Computer education develops digital skills, improves employment opportunities, enhances communication, supports research and helps people use modern technology efficiently in everyday life.

🏆 Last Minute Revision Questions

  • Characteristics of Computer
  • Generations of Computer
  • Block Diagram of Computer
  • RAM vs ROM
  • Hardware vs Software
  • Input and Output Devices