Q. What is Computer? Explain its Characteristics and
Limitations?
Ans:-
A computer is an Electronics Machine,
Which processing the Input data according to the Instructions given by the
Programmer/User and provides the desired information as an output.
Terminology
used in Definition of Computer
Data:- Data is Collection of facts or
figures.
Information:- Processed data is known
Information.(The output which we get after processing)
Input:- Data and instructions
given to computer.
Process:- Manipulation of data.
Output:- Information obtained after processing
of data.
Characteristics
of Computer
Speed:-
A computer is very fast machine. It can
perform large amount of wok in a few seconds.
Where human being worked a particular work for whole day, computer does
the same in very short time. Today,
computers can perform 100 million computations in one second. The speed of computers are measured in terms
of microseconds, Nano seconds and even in Pico seconds.
Where
1 second=10-6 micro second
=10-9 nano second
=10-12 pico second
Accuracy:- The output of computer is 100% accurate and capable to perform
arithmetical calculation and logic operations with the 100% accuracy. It can never make mistakes (All mistakes are
done by users). The cause of errors may be due to inaccurate feeding data or
due to wrong setting of the programmer. Computer
is works on GIGO Algorithm; i.e Garbage In Garbage Out, which means if faulty
instruction are provided for processing the data, obviously wrong answer will
be given, or we can say output of computer is depends on input of data and the
logical operation performed on to data.
Diligence:- Computer is a machine which has no feeling
and no emotions. It can work 24*7 with same accuracy and speed. A Human can
feel lack of concentrate but a computer is free from these and you will get the
result you want with the same speed and same accuracy.
Versatility:- Computer is capable to does multiple task at
same time. Versatility is one of the most wonderful features about the
computer. One moment, it is preparing
the results of a particular examination, the next moment it is busy in
preparing electricity bills, and in between it may be helping an office
secretary to trace an important letter is seconds. It can do multiple works at a same time. It also used in data processing jobs, weather
fore casting, ticket reservation purpose, multimedia designing, animations,
accountancy etc.
High Memory:- A Computer has the mode memory or storage
capacity then a human beings. It can
store millions of data and instructions, which can be retrieved and recalled
even after a number of years. This is
not possible in case of human brain, and the memory power of computer is
increase day by day.
Automation:- Computer does all operations automatically. It means
once the data and instructions are fed to a computer, human interventions are
not required. The computers manipulate
the data according to the instructions and continue doing so till the last
instruction is executed.
Reduce
the paper work:- The use of computer reduces lot of paper work.
We store our data in files in computer there is no required to write data on to
Papers.
Solve Complete Problems:- Computer solved those problems
which are not solved by human being computer solved the computer solved the
problems in seconds.
Limitations
of Computer
Lack
of Intelligence and Decision Power:-
Computers do not have their own Intelligence and hence cannot think. For
e.g. it can’t take there one decision.
Needs of Programs, systems and
languages:- Computer needs specified
Instructions in sequence (Programs), operating system and software’s specially
written in high level languages or machine languages etc for making the
operation.
Data
dependency:- Computers processes the
data, if data is wrong, results will be wrong.
It is said for computers, GARBAGE IN, GARBAGE OUT (GIGO) Hence
reliability of data is must.
User Dependent:- Computer is a user dependent machine. It can not do any work without programmer or
user.
Cost :-
They are costly and its maintenance is difficult calling for
expert/trained hands.
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