Goa Board Class 12 Question Paper Mar 2018 Computer Organization And Operating System _New Pattern_

2018 III 15 1000 Seat No. :

Time : 2 Hours COMPUTER ORGANIZATION AND OPERATING SYSTEM
(New Pattern)
Subject Code

#

! 
8

Total No. of Questions : 5 (Printed Pages : 3) Maximum Marks : 50

INSTRUCTIONS : i) All questions are compulsory.
ii) Figures to the right indicate full marks.
iii) Write the number of each question and sub-question clearly.
iv) Draw neat diagrams wherever necessary.
v) Answer to every question shall start on a fresh page.

1. A) Answer the following in one word each : (2×1=2)
i) Name the signal that is continuous wave form and changes smoothly over
time.
ii) Name the transmission mode that supports two way data transmission but
only in one direction at a time.

B) Answer the following : (2×2=4)
i) What is computer network ? Give two characteristics of computer network.
ii) Explain in three to four lines Metropolitan Area Network.

C) Answer the following : (1×4=4)
i) What is physical topology ? Describe tree topology with labelled diagram.
OR
ii) What is logical topology ? Explain in 4-5 lines working of Token Ring topology.

2. A) Answer the following in one word each : (2×1=2)
i) Name the print software that manages sending of jobs to the printer when
an application prints a document.
ii) Name the term used for a group of users who shares files and resources
on the network.

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B) Answer the following : (2×2=4)
i) What are dedicated servers ? Explain in 3-4 lines.
ii) Briefly explain any two ways in which intranet supports collaborative
process.

C) Answer the following : (1×4=4)
i) What is the purpose of maintaining a web server on the network ? Explain
in 6-7 lines.
OR
ii) What is Electronic Data Interchange ? Briefly explain two components of
EDI.

3. A) Answer the following in one word each : (2×1=2)
i) Name the connector used to connect a node using coaxial cable on the
network.
ii) Name the networking device that plugs multiple data cables to enable
communication between different network devices.

B) Answer the following : (2×2=4)
i) Write two differences between baseband and broadband transmission
cables.
ii) Explain the use of Network Interface Card on the network in three to four
lines.

C) Answer the following : (1×4=4)
i) Illustrate with neat labelled diagram Twisted pair cable.
OR
ii) Illustrate with neat labelled diagram Fiber optic cable.

4. A) Answer the following in one word each : (2×1=2)
i) Name the OSI layer that directly serves the end user.
ii) Name the protocol that allows computers to connect together through a
secure channel using data encryption.

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B) Answer the following : (2×2=4)
i) Write two advantages of TCP/IP.
ii) How is IPV6 different from IPV4 ?

C) Answer the following : (1×4=4)
i) Explain in 6-7 lines the responsibilities of Presentation layer.
OR
ii) Explain in 6-7 lines the responsibilities of Transport layer.

5. A) Answer the following in one word each : (2×1=2)
i) Name the data security mechanism where mathematical schemes and
algorithms are used to scramble data into unreadable text.
ii) Give the Linux command to evaluate mathematical expression.

B) Answer the following : (2×2=4)
i) What is data security ? State the different methods of data security.
ii) What is firewall ? How does packet filter firewall technique works ?

C) Answer the following : (1×4=4)
i) Write the shell script in Linux that reads an integer and checks if it is a
prime number.
OR
ii) Write the shell script in Linux that reads two filenames, check if both files
exists and their content is same. If the content is same then delete the
second file.

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