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EVOLUTION OF COMPUTER | Ch- 1 | Std. 5TH | ICSE | SOLUTION

Class: - Vth 

Subject: - Computer

Ch- 1
EVOLUTION OF COMPUTER 
5TH | ICSE | SOLUTION 




 Ex 5

Q.1 How did the early man count?

Ans: - The early man used to count with the help of stones, pebbles, bones, sticks, fingers, toes, etc.

Q.2 What is Abacus?

Ans: - Abacus was the first calculating device, invented about 5000 years ago by the Chinese.

Q.3 What did Pascaline consist of?

Ans: - It consisted of a box with movable gears that could add, subtract, multiply and divide the numbers.

Q.4 Write the five key features that Charles Babbage used in his Analytical Engine.

Ans: - The five key features: -

1)Input    2) Storage 3) Processor 4) Control Unit 5) Output Device

Q.5 What was the use of Herman Hollerith’s tabulating machine?

Ans: - This tabulating machine was used in Census (to count the population) of the USA. It gives a ‘quick’ count of the US population.

Q.6 Write down the characteristics of computer.

Ans: - There are some characteristics of computer-

1.      Speed: -   The computer allows us to perform many tasks very fast.

2.      Reliability: -   Computers are reliable and accurate.

3.      Diligence: - A computer never gets tired.

4.      Storage Capability: -    Computer can store large amount of data.

Q.7   What are the disadvantage of computer? Write any two of them.

Ans: - There are some disadvantages of computer.

1)    Health Issue    

2)    Security Issue  

3)    Waste of time and energy

4)    Limit learning 

5)    Impact on the environment

Define any two: -

1.      Health Issue: - Using computer can make us physically weak and lazy.

2.      Waste of time and energy: - Doing extra unwanted activities on computers can waste our time and energy.

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