Class: – Vth
Subject: – Computer
EVOLUTION OF COMPUTER
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.
