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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