1. Fill in the
blanks :-
1. Electronics technology developed after the
invention of the vacuum tube devices.
2. First
generation of electronic computers were built using vacuum tube devices.
3. The CPU
forms the essential component of modern stored-program computers.
4. Second generation computers were built using transistors.
5. A computer that is an order of magnitude more
powerful than other computers of its generation is called a super computer.
6. Keyboards as input devices came into use
during the third generation of computers.
7. GUI is a
feature of the fourth generation of
computers.
2. State whether
the following statements are true or false :
1. Replacement of
vacuum tubes with transistors reduced the size of computers.
Ans-> True.
2. First generation computers used keyboards for inputs.
Ans -> False.
3. Magnetic core memory were used in the second
generation computers.
Ans -> True.
4. Operating systems when they were introduced had a
graphical user interface.
Ans -> False.
5. Semiconductor memory was used in the third generation
computers.
Ans -> True.
6. A microprocessor is an integrated circuit.
Ans -> False.
7. Jack kilby’s integrated circuit was known as CPU on
chip.
Ans -> False.
3. Distinguish between :-
|
1.Vacuum
Tubes
|
Transistors
|
|
1.
Large in size.
|
1
Small in size.
|
|
2.
Consumed lot of energy.
|
2.Consumed
less energy.
|
|
3.
Produced too much heat.
|
3.
Produced less heat.
|
|
2.Second
generation Computers
|
Third
generation computers
|
|
1.
Punched cards are used for input
|
1.
key boards are used for input
|
|
2.
Magnetic drum memories are used
|
2.
Semiconductors are used as memory.
|
|
3.
Transistors are used.
|
3.
Integrated circuits are used.
|
4. Answer the following questions in one or
two sentences each :-
1. What
is meant by computer generations?
Ans:-Computers’ are categorized on the basis
of technology used to build its electronic
components. Computers’ that are built by a specific technology is
belongs to that technology.
2. Why were the first generation computers huge
in size?
Ans:- The first generations of computers’ were
built by vacuum tube technology. The Vacuum tubes were big in size and they
produced lot of heat. So they had to be cooled by big air conditioners. So they
were big in size.
3. What is a supercomputer?
Ans:-A computer that is about ten times
powerful than other computer of its generation is called supercomputer.
4. What is an integrated circuit?
Ans:-Connection of several transistors
together into a single miniaturized processing board is called an integrated circuit.
5. Answer the following questions in brief : (Write
answers in your notebook.)
1. State any five
features of the third generation computers.
Ans:-
a) Transistors were replaced by
integrated circuits.
b) They generated less heat and consumed
less energy.
c) Semiconductor memory was invented.
d) The size of the computer was
remarkably small.
e) CD-ROM was introduced.
2. State any five features of the fourth generation
computes.
Ans:-
a) These computers were made using
microprocessors.
b) Graphic user interfaces were
introduces.
c) Floppy disk was introduced.
d)
Local area Networking technology was developed.
e) Home game system Became available.
3. What are the technologies being envisaged for future
generation of computers?
Ans:-
a) Computers are planned to design with
artificial intelligence.
b) The goal is to develop the computers
that respond to natural languages.
c) Computers should be able to
learn-self.
d) Quantum computing is planned.
e) Speech processing, vision system,
robotics abilities are determined to include.