Chapter 1 Computer overview and its Basics Solutions
Question - 21 : - Explain four characteristics of computer.
Answer - 21 : -
Speed, accuracy, diligence, storage capability and versatility are some of the key characteristics of a computer. A brief overview of these characteristics are :
1. Speed : The computer can process data very fast, at the rate of millions of instructions per second. Some calculations that would have taken hours and days to complete otherwise, can be completed in a few seconds using the computer.
2. Accuracy : Computer provides a high degree of accuracy. For example : the computer can accurately give the result of division of any two numbers up to 30 decimal places.
3. Diligence : When used for a longer period of time, the computer does not get tired or fatigued. It can perform long and complex calculations with the same speed and accuracy from the start till the end.
4. Storage Capability : Large volumes of data
and information can be stored in the computer and also retrieved whenever required. A limited amount of data can be stored temporarily in the primary memory. Secondary storage devices like DVD and compact disk can store a large amount of data permanently.
Question - 22 : - Compare human beings with computer.
Answer - 22 : -
A computer is an electronic device which can process data to give meaningful information with the help of a set of instructions called ‘Program’.
In computer, following are the advantages as compare to man :
1. It is faster as compared to human beings
2. It is more accurate in comparison to human being. “
3. It can store a huge amount of information that can be retrieved instantly as compared to the human beings.
4. It is immune to boredom and tiredness.
5. It is versatile, can do different types of work with same accuracy and speed.
A computer has following disadvantages :
1. A computer does not have its own intelligence that a man has.
2. A computer cannot work without power
(electric or battery)
Question - 23 : - Write the name of the first calculating device.
Answer - 23 : -
Calculating machine ABACUS is not called a computer, it can almost be called a computer.
Question - 24 : - Write the name of first device for multiplication.
Answer - 24 : -
Napier’s Bone was a mechanical device built for the purpose of multiplication in 1617 A.D. by an English mathematician John Napier.
Question - 25 : - How many generations of computer exist ?
Answer - 25 : -
There are five gem nations of computer.
Question - 26 : - What is the time period for third generation of computer ?
Answer - 26 : -
Third Generation is from 1964 to 1971 (used Integrated Circuits).
Question - 27 : - Which computer language is used for artificial intelligence ?
Answer - 27 : -
PROLOG.
Question - 28 : - Who is known as the Father of Computers ?
Answer - 28 : -
Charles Babbage is known as the Father of Computers.
Question - 29 : - In which generation vacuum tubes were used ?
Answer - 29 : -
Vacuum tubes were used in first generation computers.
Question - 30 : - Who introduced the concept of punched cards ?
Answer - 30 : -
Herman Hollerith introduced the concept of punched cards.