CBSE Guess > Papers > Important Questions > Class XII > 2013 > Computer Science > Computer Science - by Mr. Sandip Kumar Srivastava

CBSE CLASS XII

Computer Science (C++ and Data Structure)

DCN

63.

1. Compare any two Switching techniques.
2. What do you mean by a router and switch?
3. What is web Portal ? Name any one.
4. How is Freeware different from Free Software?
5. Expand the following :
   1. FLOSS
   2. HTML
   3. GNU
   4. ARPANET
6. Akruti Software Inc has set up its new Branch at Bangalore for its office and web based activities. It has four wings of buildings namely A , K, R , S.
   
   The distance between the wings are as follows :

   Wing A to K	40 M
   Wing K to R	120 M
   Wing  R to S	60 M
   Wing A to S	170 M
   Wing K to S	150 M
   Wing A to R	70 M

   
   The number of computers in each wing is shown below:

   Wing A	25
   Wing K	50
   Wing R	125
   Wing S	10

   
   
   1. Suggest a most suitable topology along with layout for connecting all the four wings.
   2. Suggest the most suitable place to house the server with suitable reason.
   3. Suggest the placement of the following device with justification.
   4. Repeater b) Modem
   5. The organization is planning to link its head office situated in Delhi with the offices at Bangalore. Suggest an economic way to connect it; the company is ready to compromise on the speed of the connectivity. Justify your answer.

64.

1. Name the two transmission media for networking. Also write one advantage for each.
2. Expand the following terms: 
   i) XML ii) GSM
3. Differentiate between Hackers and Crackers?
4. Indian Public School in Darjeeling is setting up the network between the different wings. There are 4 wings names as Senior(S), Junior(J), Admin(A) and Hostel(H).

   Distance between various wings

   Wing A to Wing S	100m	Wing A	10
   Wing A to Wing J	200m	Wing S	200
   Wing A to Wing H	400m	Wing J	100
   Wing S to Wing J	300m	Wing H	50
   Wing S to Wing H	100m
   Wing J to Wing H	450m

   
   
   1. Suggest a suitable Topology for Networking the computer of all wings
   2. Name the wing where the server is to be installed. Justify your answer.
   3. Suggest the placement of Hub/Switch in the network.
   4. Mention an economic technology to provide internet accessibility to all wings.
5. What do you mean by Cyber law?
6. What do you mean by free software?

65.

1. Differentiate between message switching and packet switching.
2. Expand the following:                                                                                                      
   (i) SMS
   (ii) CDMA
   (iii) TCP / IP
   iv)GSM
3. Define
   i) Firewall
   ii) Proprietory software
4. “China Middleton Fashion” is planning to expand their network in India,   
   starting with two cities in India to provide infrastructure for distribution of their product. The company has planned to set up their main office units in Chennai at three locations and have named their offices as “Production Unit”, “Finance Unit” and “Media Unit”. The company has its corporate unit in New Delhi.                                                                       
   
   Approximate distances between these Units is as follows:

In continuation of the above, the company experts have planned to install the
following number of computers in each of their office units: 

1. Suggest the kind of network required (LAN,MAN,WAN) for connecting each of the following office units:
   i. Production Unit and Media Unit
   ii. Production Unit and Finance Unit
2. Which one of the following devices will you suggest for connecting all the computers within each of their office units?
   i. Switch/Hub
   ii. Modem
   iii. Telephone
3. Which of the following communication media, will you suggest to be procured by the company for connecting their local offices in Chennai for very effective (High Speed) communication?
   i. Ethernet cable
   ii. Optical fiber
   iii. Telephone cable
4. Suggest a cable/wiring layout for connecting the company’s local office units located in Chennai. Also, suggest an effective method/technology for connecting Chennai unit to the company’s office unit located in Delhi.

Submitted By : Mr. Sandip Kumar Srivastava
Email : [email protected]