Important 22 QnA All about computers

Important QnA All about computers you will get some questions and answers. So here it is!

Important 22 QnA All about computers

Let’s start this article with objective-type questions. In this first portion will be fill in the blanks, True/False, and MCQs answers only then subjective type questions.

Fill in the blanks

  1. Beads
  2. 1616
  3. Mark I
  4. 1946
  5. Transistors


  1. True
  2. False
  3. False
  4. True
  5. False

Choose the correct option

  1. All of these
  2. Pascaline
  3. Charles Babbage
  4. Vacuum Tubes
  5. EDVAC

In the next section of this article All about computers, let’s see the descriptive type questions. There are 4 questions from the chapter All about computers.

Descriptive type questions:(Write in your notebook)

1. Name two programming languages used in second-generation computers.


  1. COBOL

2. Identify the following early calculating devices by given clues:

  1. It is used to teach school children about place values in the number system – Abacus
  2. It had numbers carved on bones – Napier’s Bones
  3. It was invented by Blaise Pascal in 1641 – Pascaline
  4. It was used to prepare mathematical tables & carry out complex calculations – Difference Engine
  5. First general-purpose computer – Analytical Engine
  6. First fully automatic calculator – Mark  I

3. Write full forms:

  1. ENIAC – Electrical Numerical Integrator and Computer
  2. EDSAC – Electronic Delay Storage Automatic Calculator
  3. EDVAC – Electronic Discrete Variable Automatic Computer
  4. UNIVAC – Universal Automatic Computer
  5. IBM – International Business Machine
  6. IC – Integrated Circuit
  7. PC – Personal Computer
  8. AI – Artificial Intelligence
  9. CPU – Central Processing Unit
  10. VLSIC – Very Large Scale Integrated Circuit

4. What are the limitations of computers?


  1. Lack of decision making
  2. Do not perform any task by itself
  3. Zero IQ
  4. Produces garbage result if input data is not accurate

In the next section of All about computers let’s discuss long answer questions. There are three long answer questions for this chapter All about computers.

Long answer questions:(3/5 marks)

1.Explain few early calculating devices in detail.


  1. Abacus: 

  • It was the first calculating device
  • It consists of a frame with beads sliding on rods
  • It was used to perform basic computation like add, sub, multiply or division
  • It is still in use in many countries to teach children about place values
  • It helps to improve concentration and memorization skills

  2. Napier’s Bones:

  • It was developed by Sir John Napier in 1616
  • It had number carved on bones or on strips of wood
  • It was used to perform add, subtract, multiply, division and to find the square root of the number

  3. Pascaline

  • It was invented by Blaise Pascal in 1641
  • It was the first mechanical calculator
  • It has a rectangular box with movable wheels
  • It was used for adding, subtracting, multiplying and dividing numbers up to hundreds and thousands

  4. Difference Engine

  • It was invented by Charles Babbage in the nineteenth century 
  • It was an automatic calculating device
  • It was used to prepare mathematical tables to carry out complex calculations

  5. Analytical Engine

  • It was also developed by Charles Babbage
  • It was the first general-purpose computer
  • It had similar basic elements as input, output and memory

2. Explain generations of computers in detail.


   1. First-generation computers: 

  • Used vacuum tubes to store data
  • The input was based on punch cards and paper tapes
  • They can perform operations in MIPS (Millions of Instructions Per Second)
  • Huge in size
  • Required lots of space
  • Very high power consumption
  • Frequent hardware failure
  • Examples are – ENIAC, EDSAC, EDVAC, UNIVAC I

  2. Second-generation computers:

  • They used transistors
  • They were smaller in size
  • Very fast, efficient and more reliable than the first generation of computers
  • They used punch cards for input
  • Examples are – IBM 1401, RCA 501

3. Third-generation computers:

  • They used ICs 
  • They were smaller in size
  • High storage capacity
  • Used keyboard as an input device and monitor as an output device
  • Examples are – IBM 360 and 370 series

 4. Fourth-generation computers:

  • They used microprocessors
  • Have greater computing power capacity
  • They can use network 
  • Examples are – IBM PC and Apple Macintosh 

5. Fifth-generation computers:

  • Will use Artificial Intelligence
  • Work with multiple CPUs
  • Can be used to solve complex problems
  • Can have decision-making ability
  • Use logical reasoning

3. List out strengths of the computer.


  • Speed – Very fast in performing tasks
  • Accuracy – Accurate data in accordance with the input
  • High Storage – Huge storage capacity
  • Diligence – Lack of boredom feelings or lack of concentrations
  • Versatility – Perform different types of jobs at a time

So I hope this article All about computers will help you in solving the exercises and learn the concepts. If you have any doubts for queries, you can ask for the same.

Thank you very much for reading this article All about computers.

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