1. Read the passage and answer the questions that follow:
Computers are used in many seemingly different ways in modern life,
to the point that they are frequently misnamed “electronic brains”.
However, all these different applications use the same basic principles,
and all must be first analyzed as problems by a person before the
computer can be used. For example, a computer may be used to perform
routine work of a repetitive nature, such as maintaining the bank
of all of the customers of a bank.
Previously this job was done by manual labour. Bookkeepers were instructed
about the rules to be followed for a typical account and then they
applied them to each account. Now the computer can do this, but the
rules, must first be established by a person. This is an example of
the use of a computer to save human drudgery in processing repetitive
information.
Computers are also used to control systems in environments where it
is nor feasible for humans to act, as for example, in unmanned space
flight. A computer may be organized to respond in predetermined such
as measurements made by on-board instruments such as radar and to
signals sent from ground stations. It may also compute the position
and the velocity of the spacecraft in order to find out where the
craft is heading in relation to the desired destination. Using the
information available, the computer can send signals to the spacecraft
control systems to keep the craft on the desired course and to perform
the planned maneuvers. However, again notice that all of the operations
had to be planned ahead of time by people. A person had to think out
the response to each combination of circumstances and to organize
the computer to produce those responses. Thus a person might have
decided that the braking rockets should be fired with a thrust proportional
to the velocity and the inverse of the distance to the target. When
the computer is properly prepared, it can control the braking rockets,
but the decision about how they are fired is made by a person when
he writes the program.
The third major area of computer application is to assist people in
solving problems that are beyond human capabilities. For example,
a computer can be used to perform long sequences of computations that
could never be performed by people because of human proneness to error
and slow speed. Such situations commonly arise in mathematics or engineering
when computations can only be performed sequentially, that is, when
the results of one calculation must be known before the next can be
performed. Manual calculation of the stresses in a modern airplane
wing, for example, would be out of the question. Although the designer
of the plane makes the basic decisions about the style of the wing
and how the stresses are to be analyzed, the computer makes it possible
to perform the analysis in a practical length of time.
(i) Why does the writer think that the computer has been wrongly named
as ‘electronic brains’?
(ii) List the three major areas of computer application.
(iii) List the three major areas of computer application.
(iv) In what ways has the computer saved man from drudgery/manual
labour?
(v) Find out words from the passage which mean the same as the following:
a) Work in which you use your physical strength rather than your mind.
b) An action planned beforehand
c) Things happening in a fixed order.
Q.2
(a) Change the voice of the following sentences:
(1) The cheque issued by you has been refused by the bank.
(2) Heat turns milk sour.
(b) Fill in the blanks in the following sentences with the correct
form of the tense of the the verb given in brackets:
(i) Water __________________ (boil) at 1000C
(ii) Have you ___________ (see) my book?
(iii) You _______________ (drive) very fast.
Q.3. Do as directed:
(a) Correct the following sentences:
(I) I am understanding the lesson now.
(II) All qualities and kinds of material is available in this Mall.
(III) The house was shock by the explosion.
(b) I am right. (Use a tag question)
(c) He is ______________ able student but not ___________________
ablest. (Use proper article)
(d) Abstinence _____________ smoking will do you good. (Use correct
preposition)
(e) Use three words in your own sentences to bring out their different
meanings:
Desert; dessert
(f) He built a house. He built it at a great cost. (Combine the two
sentences into one)
(g) “the earth is round,” said the teacher. (Change into
indirect speech)
Q.4 Write a composition in about 300 words on any one of the following.
The topic sentence is given to you. Develop it keeping in mind unity,
order and coherence.
(1) How computers have changed your life.
(2) Distance education helps education reach all the comers and all
the comers and all the sections of people.
(3) Only the rich people have benefited from an open and liberalized
economy.