CBSE Class 9 Computer Applications Chapter 1 Computer System

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Assignments

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Type A: Theoretical Questions – Answer

Que 1. Which of the following is not a characteristic of a computer system?
(a) Performs fast
(b) Pertorms mathematical calculations accurately
(c) Apply judgments on its own in unknown/unexpected situations
(d) Safer in dangerous places like mines.

Answer: (c) Apply judgments on its own in unknown/unexpected situations

Que 2. Which of the following correctly defines a Computer System?
a) Hardware
(b) Software
(c) Hardware + Software + Data
(d) Hardware Software +Data +Human Being

Answer: (d) Hardware Software +Data +Human Being

Que 3. Unprocessed raw facts and figures are known as
(a) Information
(b) Storage
(c) Data
(d) All of the above

Answer: (c) Data

Que 4. In computer science, by the information we mean
(a) Any output coming out from a computer
(b) Processed data put in an intelligent form in a computer system
(c) A report printed by the computer
(d) Plural of data

Answer: (b) Processed data put in an intelligent form in a computer system

5. Which of the following activities can a computer system perform with Airlines?
(a) Display Arrival and Departure times of flights
(b) Display important messages
(c) Check seat availability and flight times
(d) None of the above
(e) All the above

Answer: (e) All of the above

Que 6. What is a computer? How is it a useful device?

Answer: A computer is an electronic device that can perform a variety of operations according to a set of instructions.
A Computer is an electronic device, that can take data and instructions as input, store it in memory, process data as per instructions, and give the output as a result or information.

A computer is useful in many ways:

• Helps in doing calculations, Online shopping, Online ordering, Education, Presentation, etc.

Que 7. What are the strengths and weaknesses of a computer system?

Answer: The strengths of computers are:

• Speed
• Accuracy
• Reliability
• Versatility
• High storage capacity

Weakness of computers are:

• Lack of decision-making power
• Zero IQ

Que 8. What do you understand by the IPO cycle?

Answer: IPO Cycle means Input-Process-Output Cycle.

Every task follows the Input-Process-Output cycle. A computer is also following the IPO cycle i.e. it takes an input, processes it, and gives the output.

Que 9. What are the four basic components of a computer system?

Answer: Four basic components of computer systems are :

• Input Unit
• Processing Unit
• Storage/Memory Unit
• Output Unit

Que 10. How can Computers be classified?

Answer: Computers can be classified based on Purpose and Principle of operation.

Purpose Wise – Category of computer

• Special-purpose Computers
• General-purpose computers

Principle of Operation wise: Category of computer

• Analog computers
• Digital Computers
• Hybrid Computers

Types of Digital Computers:

• Embedded Computers
• Microcomputers /Personal Computers
• Minicomputers
• Mainframe Computers
• Super Computers

Type B : Application Oriented Questions

Que 1. All computer systems can be split into three main components. These are shown in the following diagram

Complete the diagram below by adding the names of four different input devices and four different output devices.

Answer: