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

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

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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.


Local area network is the network which is made within the office, room or building.
Examples of local area network (LAN)

  1. Networking in home, office.
  2. Networking between two computers.

Personal area network (PAN) used to connect different devices like we connect our pc, mobile and PAD to one another.
Example of personal area network is

  1. Sharing of data via Bluetooth.
  2. Creating Hotspot.

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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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