Boost your exam preparation with complete SEBA Class 9 Computer Science Chapter 1 (Introduction to Computer System) extra questions and answers for the 2026–27 academic year. Access curated short answer questions, Very Short Answer Questions (VSAQs), long conceptual questions, fill in the blanks, and high-yield exam notes to score top marks in your annual computer science exams.
1. Q: What is a computer?
Answer: A computer is an electronic device that processes data according to given instructions and produces meaningful information.
2. Q: Define data and information.
Answer: Data are raw facts such as marks and roll numbers, while information is processed data such as a result sheet.
3. Q: Write any two reasons why computer education is important today.
Answer: Computer education enhances creativity and thinking skills. It also provides better job opportunities and essential digital skills.
4. Q: Mention any two uses of computers in daily life.
Answer: two uses of computers in daily life are :
- Computers are used for online learning and communication.
- They are also used in banking and online shopping.
5. Q: What is computer education?
Answer: Computer education means learning to use and operate computers effectively in daily life and work.
6. Q: Name any three main features of a computer.
Answer: The main features of a computer are speed, accuracy, and storage capacity.
7. Q: Why is a computer called a diligent machine?
Answer:A computer is called a diligent machine because it never gets tired or bored and can work continuously without fatigue.
8. Q: What does versatility of a computer mean?
Answer: Versatility means that a computer can perform many different tasks such as studying, designing, and gaming.
9. Q: Who invented the Abacus and when?
Answer:The Abacus was invented in Mesopotamia around 3500 BC for basic calculations.
10. Q: Who is known as the Father of Computers?
Answer: Charles Babbage is known as the Father of Computers because he invented the Analytical Engine and Difference Engine.
SEBA Class 9 Computer Science Chapter 1 Extra Questions
11. Q: Who was the world’s first computer programmer?
Answer: Lady Ada Lovelace was the world’s first computer programmer.
12. Q: Name any two early calculating devices.
Answer: Napier’s Bones and Pascaline are two early calculating devices.
13. Q: What was Jacquard’s Loom used for?
Answer: Jacquard’s Loom was used to weave patterns automatically using punched cards.
14. Q: Name the first general-purpose electronic digital computer.
Answer: ENIAC was the first general-purpose electronic digital computer.
15. Q: What technology was used in first-generation computers?
Answer: First-generation computers used vacuum tubes.
16. Q: What replaced vacuum tubes in second-generation computers?
Answer: Transistors replaced vacuum tubes in second-generation computers.
17. Q: What are Integrated Circuits (ICs)?
Answer: Integrated Circuits are tiny chips containing multiple transistors used in third-generation computers.
18. Q: What is a microprocessor?
Answer: A microprocessor is a small electronic chip that contains the CPU and is used in fourth-generation computers.
19. Q: What is unique about fifth-generation computers?
Answer: Fifth-generation computers use Artificial Intelligence to think and learn like humans.
20. Q: Mention two uses of computers in education.
Answer: two uses of computers in education are :
- Computers are used in smart classrooms and online learning.
- They are also used for preparing lessons and conducting exams.
Class 9 Computer Science Chapter 1 Important Questions SEBA 2026-27
21. Q: Mention two uses of computers in medicine.
Answer: two uses of computers in medicine are:
- Computers are used for storing patient records.
- They are also used in operating diagnostic and monitoring systems.
22. Q: Write any two limitations of a computer.
Answer: two limitations of a computer are:
- A computer cannot think or make decisions on its own.
- It works only with proper instructions.
23. Q: Name the five main operations of a computer.
Answer: The five main operations of a computer are input, processing, storage, output, and control.
24. Q: What is the function of the input unit?
Answer: The input unit is used to enter data and instructions into the computer.
25. Q: Give two examples of input devices.
Answer: Keyboard and mouse are examples of input devices.
26. Q: What is the function of the output unit?
Answer: The output unit presents the processed data in a human-readable form.
27. Q: Give two examples of output devices.
Answer: Monitor and printer are examples of output devices.
28. Q: What are the three parts of the CPU?
Answer: The three parts of the CPU are the Arithmetic Logic Unit, Control Unit, and registers.
29. Q: What is the role of ALU?
Answer: The ALU performs all arithmetic and logical operations.
30. Q: What does the Control Unit do?
Answer: The Control Unit directs and coordinates all activities inside the computer.
SEBA Class 9 Computer Science Ch 1 VSAQ Notes
31. Q: What are registers?
Answer: Registers are high-speed temporary memory units inside the CPU used to store data being processed.
32. Q: What are computer buses?
Answer: Computer buses are data pathways that connect different parts of the computer.
33. Q: What is primary memory?
Answer: Primary memory is the main memory, including RAM and ROM, used to store data temporarily for processing.
34. Q: What is secondary memory?
Answer: Secondary memory is external storage used to store data permanently, such as hard disks and pen drives.
35. Q: What is RAM?
Answer: RAM is Random Access Memory, which is temporary and volatile memory used for current data processing.
36. Q: What is ROM?
Answer: ROM is Read Only Memory, which is permanent memory used to store startup instructions.
37. Q: What is the difference between SRAM and DRAM?
Answer:
| SRAM (Static RAM) | DRAM (Dynamic RAM) |
| Fast | Slower |
| Expensive | Cheaper |
| Does not require refreshing | Requires periodic refreshing |
38. Q: Give examples of solid-state storage devices.
Answer: Pen drive and memory card are examples of solid-state storage devices.
39. Q: What is a scanner used for?
Answer: A scanner is used to convert text or images into digital form.
40. Q: Name two pointing devices.
Answer: Mouse and joystick are pointing devices.
Introduction to Computer System Class 9 Extra Question Answer
41. Q: What is an OMR device used for?
Answer: An OMR device is used to read marked answers on examination sheets.
42. Q: What is MICR used for?
Answer: MICR is used to read characters printed on bank cheques.
43. Q: What are the two types of printers?
Answer: The two types of printers are impact printers and non-impact printers.
44. Q: Give one example each of impact and non-impact printers.
Answer: Dot Matrix is an impact printer, and Laser Printer is a non-impact printer.
45. Q: Define hardware and give two examples.
Answer: Hardware refers to the physical components of a computer such as the CPU and keyboard.
46. Q: Define software.
Answer: Software is a set of programs that instruct the computer on what to do and how to do it.
47. Q: Name two types of software.
Answer: The two types of software are system software and application software.
48. Q: What is an operating system?
Answer: An operating system is system software that manages hardware and acts as an interface between the user and the computer.
49. Q: What is a compiler?
Answer: A compiler is a language processor that translates an entire program into machine code at once.
50. Q: What are utilities? Give examples.
Answer: Utilities are system programs that maintain the computer, such as antivirus software, backup tools, and file managers.
Class 9 Computer Science SEBA Board Exam Notes 2026-27
51. Q: What is general-purpose application software?
Answer: General-purpose application software is designed for common tasks such as word processing and spreadsheets.
52. Q: What is specific-purpose application software?
Answer: Specific-purpose application software is designed for specialized tasks such as payroll and ticket reservation.
53. Q: Give two examples of general-purpose software.
Answer: MS Word and MS Excel are examples of general-purpose software.
54. Q: Give two examples of specific-purpose software.
Answer: Accounting software and a school inventory system are examples of specific-purpose software.
55. Q: What factors affect computer performance?
Answer: Computer performance is affected by CPU speed, memory size, and the number of programs running simultaneously.
💻 Exam Special Extra Questions Notice: This page provides high-yield SEBA Class 9 Computer Science Chapter 1 Extra Questions & Answers updated for the 2026–27 academic session. All additional Very Short Answer Questions (VSAQs), memory hierarchy charts, hardware vs. software comparisons, and input/output device notes strictly follow the latest revised Assam Board curriculum.
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