CBSE Guess > Papers > Important Questions > Class XII > 2010 > Computer Science > Computer Science By Ravi Kiran

CBSE CLASS XII

7. (a) What is the significance of Cyber law ?

(b) Expand the following terms with respect to Networking : 2
(i) CDMA (iii) FTP
(ii) WLL (iv) HTML

(c) Which of the following unit measures the speed with which data can be transmitted from one node to another node of a network? Also, give the expansion of the suggested unit.
(i) Mbps
(ii) KMph
(iii) MGps

(d) “Bhartiya Connectivity Association” is planning o spread their offices in four major cities in India to provide regional IT infrastructure support in the ield of Education & Culture. The company has planned to setup their head office in New Delhi in three locations and have named their New Delhi offices as“Front Office”, “Back Office” and “Work Office”. The company has three more regional offices as “South Office”, “East Office” and “West Office”located in other three major cities of India. A rough layout of the same is as follows : Approximate distances between these offices as per network survey team is
as follows:

Place From Place To Distance
BackOffice Front Office 10KM
Back Office Work Office 70 Meter
Back Office East Office 1291 KM
BackOffice West Office 790 KM
Back Office South Office 1952 KM

In continuation of the above, the company experts have planned to install the
following number of computers in each of their offices :
Back Office 100
Front Office 20
Work Office 50
East Office 50
West Office 50
South Office 50

(i) Suggest network type (out of LAN, MAN, WAN) for connecting each of the following set of their offices :
a. Back Office and Work Office
b. Back Office and South Office

(ii) Which device you will suggest to be procured by the company for connecting all the computers with in each of their offices out of the following devices?

a. Switch/Hub
b. Modem
c. Telephone

(iii) Which of the following communication medium, you will suggest to be procured by the company for connecting their local offices in New Delhi for very effective and fast communication?
a. Telephone Cable
b. Optical Fiber
c. Ethernet Cable

(iv) Suggest a cable/wiring layout for connecting the company’s local offices located in New Delhi. Also, suggest an effective method/technology for connecting the company’s regional offices-”East Office”, “West Office” and “South Office” with offices located in New Delhi.

The answers given in the marking scheme are SUGGESTIVE. Examiners are requested to award marks for all alternative correct Solutions/Answers conveying the similar meaning
All programming questions have to be answered with respect to C++ Language only
In C++, ignore case sensitivity for identifiers (Variable/Functions/Structures/Class Names)
In SQL related questions – both ways of text/character entries should be acceptable for Example: “AMAR” and ‘amar’ both are correct.
In SQL related questions – semicolon should be ignored for terminating the SQL statements In SQL related questions, ignore case sensitivity.

Paper By Mr. Ravi Kiran
Email Id : [email protected]