Class 4 | Learn With Computer 4 |Lesson 1: Brief History of COMPUTER

EXERCISE

A. Multiple Choice Question. Tick (✔️) the correct option.

(1) Who was Charles Babbage?

    (a) Doctor

    (b) Mathematician ✔️

    (c) Lawyer

(2) What was the name of the first digital computer?

    (a) Mark-I ✔️

    (b) ENIAC 

    (c) Pascaline

(3) The first real mechanical calculator was built by:

    (a) John Napier

    (b) Charles Babbage

    (c) Blaise Pascal ✔️

(4) In ...... German Mathematician Oughtred invented slide rule

    (1) 1620 ✔️

    (2) 1988

    (3) 1795

(5) Each wheel was divided in to parts of Pascal's calculator

    (a) 18

    (b) 16

    (c) 10 ✔️

B. Fill in the blanks:

(Mathematician, Mark-I, France, China, Charles, Babbage, Slide rule, Difference Engine)

1. Mark-I was the name of the first automatic digital computer.

2. The mathematician was Charles Babbage.

3. The abacus was invented in about 2000 BC in China.

4. The outline of Anylytical Engine was prepared by Charles Babbage.

5. Pascaline was made in France By Blaise Pascal.

6. Charles Babbage made very useful machine called Difference Engine.

7. For easy calculation William Austraid invented Slide Rule.

C. Mark these statements as correct (✔️) or incorrect (❌).

1. The Abacus is still used in Russia, Japan and China extensively.

Ans: ✔️

2. John Napier invented slide Rule.

Ans: ❌

3. Mark-I was the first Multipurpose computer.

Ans: ✔️

4. Blaise Pascal is called the 'Father of Computer'.

Ans: ❌

5. Difference Engine was developed by Charles Babbage.

Ans: ✔️

D. Match the following:

1. Slide Rule a. Charles Babbage

2. Analytical Engine b. Blaise Pascal

3. Mark-I  c. William Oughtred

4. Pascal Calculator d. Pro. Ackins and Prof. Hopper

Ans: 1.-c; 2.-a; 3.-d.; 4.-b

E. Answer the following questions:

1. What do you understand by a computer?

Ans: The word 'Computer' is derived from the English word 'Compute' which means 'One Which Calculates'. Thus a computer is an electronic machine that helps us in doing calculations.

2. In ancient times, how was counting done by the man?

Ans: In ancient times, man used to count his animals with the help of things around him. For example small stones, bones, fingers, etc.

3. What is an abacus?

Ans: Abacus is the first calculating device of the world invented in China in about 2000 B.C.

4. Why is Charles Babbage called the 'Father of Computer'?

Ans: Charles Babbage made a machine which could calculate the value of algebraic formulate accurately up to 20 decimal places. Thus, he was the first man who invented such thing. So, he is called the 'Father of Computer'.

5. What is considered as the first ancestor of modern computers?

Ans: The Analytical Engine is considered as the first ancestor of modern computers.