Notes Bel Sample Paper | preparation material for computer Science students-Part 2/June 2011

Published by Roma Rahul Gupta for Jobs_For_Everyone

 Notes Bel Sample Paper|preparation material for computer Science students-Part 2

Today I am going to post Questions on Computer Network.
Let's Start prepartion for BEL_Exam26 june 2011_CS

Guys, As we all know that BEL is going to take test on 26 june 2011.

I have posted questions on COMPILER DESIGN lastly.

Bel Sample Paper|Computer Network
1.Which Layer is not present in TCP/ IP model?
(A)Application Layer (B)Internet Layer
(C)Transport Layer (D)Presentation Layer

Answer:(D)Presentation Layer
Explanation:Presentation layer is not present in TCP/ IP Model.

2.Address 192.5.48.3 belongs to
(A) class A (B)class B
(C) class C (D)class D

Answer:(C) class C
Explanation: Class Address
A 0.0.0.0 - 127.255.255.255
B 128.0.0.0 - 191.255.255.255
C 192.0.0.0 - 223.255.255.255
Therefore, Address 192.5.48.3 belongs to class C.

3.FDDI (Fiber Distr ibuted Data Interconnect) is an example of
(A) token ring (B) token bus
(C) star topology (D) multipoint network

Answer:A) token ring

4.In cyclic redundancy checking CRC is the
(A) divisor (B) quotient
(C) dividend (D) remainder

Answer:(D) remainder
Explanation:The quotient of a division is not important, and not efficient to remember,because that would be only a couple of bits less than the bitstring where you wanted to calculate the CRC from. What IS important is the remainder! That's the thing that says something important over about the original file. That's
basically the CRC!

5.UDP (User Diagram Protocol) is
(A)Connectionless (B)Message Oriented
(C) Connection oriented (D) Both(A)and(B)

Answer: (D) Both(A)and(B)
Explanation:UDP (User Datagram Protocol): UDP is a thin and unreliable protocol. UDP is a connectionless protocol. It doesn't contact the destination before sending the packet and doesn't care whether the packet is reached at the destination.

6.ATM is an example of
(A) Ring topology (B) Star topology
(C) Bus topology (D) None of the above

Answer: (B) Star topology
Explanation:STAR Topology: In the star network all the computers and other network devices connected with central Device called HUB or SWITCH. Each connected require a single cable to connected to HUB. Creating point to point connection between hub or network device. Example Is ATM.

7.A Network uses a star topology if
(A) Computers are arranged in a closed loop.
(B) All computers attach to a central point.
(C) All computers attach to a single long cable.
(D) Computers attach to multiple hierarchical cables.

Answer: (B)All computers attach to a central point
Explanation:STAR Topology: In the star network all the computers and other network devices connected with central Device called HUB or SWITCH. Each connected require a single cable to connected to HUB. Creating point to point connection between hub or network device.

8.Which Layer is not present in TCP/ IP model?
(A) Application Layer (B) Internet Layer
(C) Transport Layer (D) Presentation Layer

Answer: (D) Presentation Layer
Explanation:TCP/IP model has four layers i.e.Application Layer,Transport Layer,Internet Layer,Network Access Layer

9.Start and stop bits are used in serial communication for
(A) Error Detection (B) Error Correction
(C) Synchronization (D) Slowing down the communication

Answer:(C) Synchronization
Explanation:Serial communication is often used either to control or to receive data from an embedded microprocessor. Serial communication is a form of I/O in which the bits of a byte begin transferred appear one after the other in a timed sequence on a single wire. Serial communication has become the standard for intercomputer communication. Each byte is preceded by a start bit and followed by one stop bit. The start and stop bits are used to synchronize the serial receivers. The data byte is always transmitted least-significant-bit first. For error checking it is possible to include a parity bit as well, just prior to the stop bit. The bits are transmitted at specific time intervals determined by the baud rate of the serial signal. The baud rate is the reciprocal of the time to send 1 bit. Error-free serial communication requires that the baud rate, number of data bits, number of stop bits, and presence or absence of a parity bit be the same at the transmitter and at the receiver.

10.The network topology that supports bi-directional links between each possible node is
(A)Ring (B)star
(C) Tree (D) Mesh

Answer:(D) Mesh
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MORE QUESTIONS FROM DIFFERENT SUBJECTS WILL POST IN  ANOTHER POST.

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