Class XII Subject : Informatics Practices Marks: 70

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Class XI
I

Subject : Informatics Practices Marks: 70

Q1. Answer the following questions:


(a) Write one point of difference between:

(i) Freeware and Free software. (ii) Front end and Back end technology





(2)

(b) How is post implementation review important during System Development Life Cycle?



(2)

(c) Explain in brief the following terms:









(2)

(i) GNU (ii) Data Mining

(d)
H
ow is coaxial cable different from optical fibre?







[2]

(e)
What is the difference between IP address and MAC address ?






[2]

(f)
What is snooping and phishing?





[2]

(g)
What are the co
mmon threats to Network Security?







[2]


Q2. Answer the following

(a)

Define e
-
governance







[1]

(b)
How is Back end linked to a D
a
tabase and a Server?











[2]

(c)
What are the benefits of E
-
Business?











[2]

(
d
) Which of the following are open source LINUX , MS Window Vista , Python , MySQL , PageMaker.


[1]

(
e
) Write down two merits and two demerits of the following topologies






[
2
]

i. STAR



ii. Tree

(
f
) List down merits of open standards.












[
1
]

(
g
) What is front
-
end?














[
1
]

(
h
) Give one societal impact of e
-
business.











[
1
]


Q
3
. Answer the following questions:


a)
What type of network would you suggest for the following type of requirements in an organization?


i) Around 200 computers in two different buildings adjacent to one another are to be connected.


ii) The cost of network should not be very high.


iii) It should be fairly easy to implement.



[2]

b)
Mr. Vasu is transferring data to a large distance via cable connection and he wants to amplify the signal
transmitting over a network. What device will be useful for him?



[
1
]

c) What do you mean by network topology?
Write one advantage and one disadvantage of star topology.
[2]

d)
What is freeware? How is it different from free software?



[
2
]

e)
Which of the following technologies require line
-
of site

between the transmitter and receiver?


[1]


a) Satellite b) Fiber Optic c) Microwave

d) Co
-
axial Cable

f)
What is openoffice.org?
[1]

g) Which protocol is used for transfer
files over

the internet?

[1]

h
)

What is
Interface in Java
?
What purpose does it solve?

[1]





Q.4. Read the following answer:


(a)
Explain in brief of
networking needs and goals.





(2)

(
b) What is a markup language?explain with an example





(2)

(
c
)Mention the purpose of each of the following HTML tags:




2


<B>,


<LI>,



<HR>,

<TABLE>

(
d
)

Name the tag which is used to insert image in

background of HTML with example.

1


(e)
What is the use of <CENTER> tag in an HTML document?




1


Q5.

Answer the following questions:

(i)
Write all Operator Names in Java with short description?





5

(ii)
What are the differences between hardware,
software and firmware?



5

(
iii
) Explain the difference between domain name and URL with the help of appropriate example of each.

[2]

(iv)
W
hile working in netbeans ,ranjeeta included a listbox in the form.now she want

the list of her friend’s
names to be
displayed in it .which property of listbox control should she use to do this?

[1]


Q6.

Richika is a programmer at Alpha Builders. To calculate wages to be paid to labourers she has developed
the following GUI in Netbeans






[
13
]




a) Mention various
swing controls used for the items shown in GUI

b)Write code to do Close the application when the “STOP” button in pressed.

c) Write the steps to create this GUI.