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Unformatted text preview: se. To put it in a different manner, a computer does in one minute what would
take a man his entire lifetime.
While talking about the speed of a computer, we do not talk in terms of seconds or even
milliseconds (10'3). Our units of speed are the microseconds (10' 6), the nanoseconds
(10'9), and even the .
picoseconds (10' 12).
A powerful computer is capable of
performing several billion (109) simple arithmetic operations per second.
3. Accuracy. In addition to being very fast, computers are very accurate. The accuracy
of a computer is consistently high and the degree of accuracy of a particular computer
depends upon its design. But for a particular computer, each and every calculation is
performed with the same accuracy.
The electronic circuits of a computer that perform computations have no mechanical parts
to wear and malfunction, resulting in errorless operation continuously. Hence, if the input
data entering the computer are correct and if the program of instructions is reliable, then
we can expect that the computer generally will produce accurate output. Errors can occur
in a computer, but these are mainly due to human rather than technological weaknesses,
that is, due to imprecise thinking by the programmer (a person who writes instructions for
a computer to solve a particular problem) or due to incorrect input data. Computer errors
caused due to incorrect input data or unreliable programs is often referred to as garbagein-garbage-out or GIGO.
4. Diligence. Unlike human beings, a computer is free from monotony, tiredness, lack
of concentration, etc., and hence can work for hours together without creating any error
and without grumbling. Due to this property, computers obviously score over human
beings in doing routine type of jobs, which require great accuracy. If ten million
calculations have to be performed, a computer will perform the ten millionth calculation
with exactly the same accuracy and speed as the first one.
5. Versatility. Versatility is one of the most wonderful things about the comput...
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This document was uploaded on 04/07/2014.
- Spring '14