Samacheer Kalvi 9th Science Solutions Chapter 25 Computer – An Introduction

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Tamilnadu Samacheer Kalvi 9th Science Solutions Chapter 25 Computer – An Introduction

Samacheer Kalvi 9th Science Computer – An Introduction Textbook Exercises

I. Choose the correct answer.

Question 1.
……………. is an electronic device which stores data and information.
(a) Telescope
(b) Television
(c) Computer
(d) Radio
Answer:
(c) Computer

Question 2.
…………….. belongs to the generation IV of the computer.
(a) Microprocessor
(b) Artificial intelligence
(c) Transistor
(d) Vacuum Tubes
Answer:
(a) Microprocessor

Question 3.
Data processing involves ……………. steps.
(a) seven
(b) four
(c) six
(d) eight
Answer:
(c) six

Question 4.
(i) Abacus belongs to the first generation of the computer.
(ii) ENIAC was used in the American military.
(a) Both the statements are correct
(b) Statement (i) is wrong but (ii) is correct
(c) Statement (i) is correct but (ii) is wrong
(d) Both the statements are wrong.
Answer:
(a) Both the statements are correct

II. Match the following.

1. III generation computer – (a) Integrated circuit
2. Text, number – (b) Information
3. Transistor – (c) Father of computer
4. Directly used – (d) Data
5. Charles Babbage – (e) II generation

Answer:

1. (a) Integrated circuit
2. (d) Data
3. (e) II generation
4. (b) Information
5. (c) Father of computer

III. Answer the following in brief.

Question 1.
Define computer.
Answer:

• A computer is an electronic device, which manipulates and stores data and information through commands or program codes.
• The computer operates by the exchange of commands between the hardware and software. Hardware can be touched and felt, but the software cannot be.

Question 2.
Differentiate data and information.

S.No	DATA	INFORMATION
1	Data is used as input for the computer system	Information is the output of data
2	Data doesn’t depend on information	Information depends on data
3	Data is not specific	Information is specific
4	Data doesn’t carry a meaning	The information must carry a logical meaning

Question 3.
What is data processing?
Answer:
The data processing in a computer is collecting data and converting it into information according to our needs and requirements.

IV. Answer the following in detail:-

Question 1.
What are the different steps involved in data processing?
Answer:
The steps in Data Processing: Data processing has six steps. They are:

• Data collection
• Data storage
• Data sorting
• Data processing
• Data analysis
• Data presentation and conclusions

Question 2.
List out the generations of computers.

PERIOD	GENERATION	DIGITAL DEVICES
1940- 1956	1 Generation	Vacuum tubes
1956 -1963	II Generation	Transistor
1964-1971	HI Generation	Integrated circuits
1972-2010	IV Generation	Microprocessors
After-2010	V Generation	Artificial Intelligence

Samacheer Kalvi 9th Science Computer – An Introduction Additional Questions

I. Fill in the blanks.

1. ………………. is an electronic device which manipulates and stores data and information.
2. Lady Augusta Ada Lovelace was honored as the first programmer for programming ……………..
3. The computer operates by the exchange of ……………… between the hardware and software.
4. ……………. designed the basic constructions of a computer.
5. The first and basic method of computing is ………………..

Answer:

1. Computer
2. Arithmetic operations
3. Commands
4. Charles Babbage
5. Abacus