Subject

Computer and Communication Technology

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsShort Answer Type

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21.

Verify the following using Boolean Laws.
A’+ B’.C = A’.B’.C’+ A’.B.C’+ A’.B.C + A’.B’.C+ A.B’.C


LHS
A’ + B’.C
= A’.(B + B’).(C + C’) + (A + A’).B’.C
= A’.B.C + A’.B.C’ + A’.B’.C + A’.B’.C’ + A.B’.C + A’.B’.C
= A’.B.C + A’.B.C’ + A’.B’.C + A’.B’.C’ + A.B’.C
= A’.B’.C’ + A’.B.C’ + A’.B.C + A’.B’.C + A.B’.C
= RHS

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22.

Write the Boolean Expression for the result of the Logic Circuit as shown below:

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23.

Derive a Canonical POS expression for a Boolean function F, represented by the following truth table:

P Q R F(P, Q, R)
0 0 0 0
0 0 1 1
0 1 0 1
0 1 1 0
1 0 0 0
1 0 1 0
1 1 0 1
1 1 1 1

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24.

Reduce the following Boolean Expression to its simplest form using K-Map:
F(X,Y,Z,W)= (2,6,7,8,9,10,11,13,14,15)

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25.

Give two examples of PAN and LAN type of networks.

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26.

Which protocol helps us to browse through web pages using internet browsers?
Name any one internet browser.

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27.

Write two advantages of 4G over 3G Mobile Telecommunication Technologies in terms of speed and services?

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28.

Write two characteristics of Web 2.0.

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29.

What is the basic difference between Trojan Horse and Computer Worm?

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30.

Categories the following under Client side and Server Side script category?

  1. VB Sript
  2. ASP
  3. JSP
  4. JavaScript

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