9th Std Science Term 1 Solution in English | Lesson.9 Computer – An Introduction

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Lesson 9. Computer – An Introduction

Computer – An Introduction - Book Back Answer

Lesson 9. Computer – An Introduction

I. Choose the correct answer

1. ____________ is an electronic device which stores data and information.

  1. Telescope
  2. Television
  3. Computer
  4. Radio

Ans ; Computer

2. _________ belongs to the generation IV of the computer

  1. Microprocessor
  2. Artificial intelligence
  3. Transistor
  4. Vaccum Tubes

Ans ; Microprocessor

3. Data processing involves________ steps.

  1. seven
  2. four
  3. six
  4. eight

Ans ; six

4. 1. Abacus belongs to the first generation of the computer.

2. ENIAC was used in the American military.

  1. Both the statements are correct
  2. Statement 1 is wrong but 2 is correct
  3. Statement 1 is correct but 2 is wrong
  4. Both the statements are wrong.

Ans ; Statement 1 is wrong but 2 is correct

IV. Match the following

1. III generation computer integrated circuit
2. Text, number information
3. Transistor Father of computer
4. Directly used Data
5. Charles Babbage II generation
Ans : 1 – A, 2 – D, 3 – E, 4 – B, 5 – C

III. Short Answer Questions :

1. Define computer.

Computer is an electronic device which manipulates and stores data and information through commands or program codes.

2. Differentiate data and information.

Data Information
1. Set of values of qualitative and quantitative variables Processed data
2. It cannot be used directly it can be used directly

3. What is data processing?

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 

1. What are the different steps involved in data processing?

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

2. List out the generations of computer.

Period Generation Digital device used
1940-1956 First Vaccum tube
1956-1963 Second  Transistor
1964-1971 Third Integrated circuit
1972-2010 Fourth Micro processor
After 2010 Fifth  Artificial intelligence

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