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Computer Networking 100 Questions for all exams

These are very important questions and some of them have been asked in various exams earlier:

1. _____terminals (formerly known as cash registers) are
often connected to complex inventory and sales computer
systems.
(1) Point-of-sale (POS) (2) Data (3) Sales
(4) Query
(5) None of these

Ans: 1 

2. Smaller and less expensive PC-based servers are
replacing ____ in many busi-nesses.
(1) supercomputers (2) mainframes (3) laptops (4) clients
(5) None of these
Ans: 2

3. DSL is an example of a(n) _____ connection.
(1) network (2) wireless
(3) slow
(4) None of these
(5) broadband
Ans: 5

4. A term used to describe interconnected computer
configuration is
(1) Micro program sequence
(2) Modulation
(3) Multiprocessing
(4) Multiprogramming
(5) None of these
Ans: 4

5. What is required when more than one person uses a
central computer at the same time?
(1) Light pen (2) Mouse (3) Terminal (4) Digitizer
(5) None of these
Ans: 3

6. Multi user systems provided cost savings for small
business because they use a single pro-cessing unit to link
several
(1) Personal computers
(2) Dumb terminals
(3) Workstations
(4) Mainframes
(5) None of these
Ans: 2

7. A dumb terminal has
(1) An embedded micro-proces-
(2) Extensive memory
(3) A keyboard and screen
(4) Independeh I processing
(5) None of these
Ans: 3

8. What is the full form of USB as used in computer related
activities ?
(1) Universal Serial Bus
(2) Ultra Serial Block
(3) United Service Block
(4) Universal Security Block
(5) None of these
Ans: 1

9. A device that connects to a network without the use pf
cables is said to be—
(1) distributed
(2) open source
(3) centralized
(4) wireless
(5) None of these
Ans: 4

10. A ___ is a collection of com-puters and device connected
together.
(1) network
(2) memory card
(3) protocol
(4) central processing unit
(5) None of these Allahabad Bank Clerk Exam, 31.08.2008
Ans: 1

11. Multiplexing involves_ path and _ channel.
(1) one, one
(2) multiple, one
(3) one, multiple
(4) multiple, multiple
(5) None of these
Ans: 3

12. Which one amongst them is not an inter network ?
(1) LAN (2) WAN
(3) MAN
(4) All are internet works
(5) None of these
Ans: 1

13. A proxy server is used for which of the following ?
(1) To provide security against unauthorized users
(2) To provide TCP/IP
(3) To process client requests for datab'ase access
(4) To process client requests for Web pages
(5) None of these
Ans: 4

14. The ability to easily add addi-tional users means that a
net work is
(1) secure
(2) dedicated
(3) decentralized
(4) scalable
(5) None of these
Ans: 4

15. If you wish to extend the length of the network without
having the signal degrade, you would use a
(1) repeater
(2) switch
(3) gateway
(4) router
(5) None of these
Ans: 2

16. A(n) __ is a private corporate network, used exclusively
by company employees.
(1) intranet
(2) local area network
(3) peer-to-peer
(4) Internet
(5) None of these
Ans: 1

17. A characteristic of a file server is which of the following ?
(1) Acts as a fat client and is limited to one PC
(2) Manages file operations and is limited to one PC
(3) Acts as a fat client and is shared on a network
(4) Manages file operations and is shared on a network
(5) None of these
Ans: 4

18. Which of the following terms is just the connection of networks
that can be joined together?
(1) Virtual private network (2) Internet (3) None of these (4) Extranct (5) Intranet
Ans: 5

19. Servers are computers that provide resources to the
other computers connected to a _
(1) Mainframe (2) Network (3) Super computer (4) Client
(5) None of these
Ans: 2

20. The most important or powerful computer in a typical
network is ( Asked SBI Clerk Exam)
(1) desktop
(2) network cliejit
(3) network station
(4) network server
(5) None of these 

Ans: 4

21. To make a notebook act as a desktop model, the
notebook can, be connected to a__ which is connected to a
monitor and other devices.
(1) bay (2) network (3) port (4) docking station
(5) None of these
Ans: 4

22. A set of rules that computer on a network use to communicate
with each other are called
(1) Protocol
(2) Regulations
(3) Rules
(4) Netiquettes
(5) None of these

Ans: 1

23. Which of the following refers to a small, single site
network?
(1) CPJ (2) DSL (3) RAM (4) USB (5) LAN
Ans: 5

24. Computer connected to a LAN {Local Area Network) can
(1) share information and/or share peripheral equipment
(2) go on line (3) run faster (4) E-mail
(5) None of these
Ans: 1

25. The __ is a device that connects n inputstom outputs,
(1) Crosspoint
(2) Crossbar
(3) None of these
(4) RAM
(5) Modem
Ans: 5

26. The sharing of a medium and its path by 2 or more
devices is called _.
(1) Multiplexing
(2) Encoxing
(3) Line discipline
(4) Modulation
(5) None of these
Ans: 1

27. Which multiplexing technique transmits ariatog signals ?
(1) Asynchronous TDM
(2) Synchronous TDM
(3) FDM
(4) Both (2) and (3)
(5) None of these
Ans: 3

28. Network components are connected to the same
cable in the— topology,
(1) mesh (2) ring (3) bus (4) star (5) mixed
Ans: 4

29. Two or more computers connected to each other
for shar-ing information form a ——
(1) pipeline (2) router (3) server (4) tunnel (5) network
Ans: 5

30. Office LANs that are spread geographically apart on a
large scale can be connected using a corporate ——
(1) CAN (2) WAN (3) DAN (4) LAN (5) TAN
Ans: 2

31. For separating channels in FDM, it is necessary to use
(1) Differentiation
(2) Bandpass filters
(3) Time slots
(4) All of the above
(5) None of these
Ans: 3

32. Encryption and decryption are functions of
(1) Transport layer
(2) None of these
(3) Presentation layer
(4) Allot the above
(5) Session layer
Ans: 5

33. Which type of switching uses the entire capacity of a
dedicated link?
(1) Datagram Packet Switch-ing
(2) Virtual Circuit Packet Switching
(3) Circuit switching
(4) Message Switching
(5) None of these
Ans: 1 

34. A peimanent virtual circuit involves
(1) All of the above (2) Data transfer
(3) Connection release
(4) Connection establishment
(5) None of these
Ans: 4

35. X.21 protocol consists of
(1) Only physical level
(2) Frame and packet levels
(3) Physical, frame and pack-et levels
(4) Physical and frame levels
(5) None of these
Ans: 1


36. In OSI network architecture, the dialogue control and
token management are responsibility of
(1) transport layer
(2) network layer
(3) session layer
(4) data link layer
(5) none of above
Ans: 3

37. In OSI network architecture, the routing is performed by
(1) data link layer
(2) network layer
(3) .transport layer
(4) session layer
(5) none of above
Ans: 2

38. Which of the following performs modulation and
demodulation?
(1) modem (2) satellite
(3) coaxial cable
(4) fiber optics
(5) none of the above
Ans: 1

39. The process of converting analog signals into digital
signals so they can be processed by a receiving computer is
referred to as:
(1) modulation
(2) digitising
(3) synchronizing
(4) demodulation
Ans: 2

40. How many OSI layers are covered in the X.25 standard?
(1) Two (2) Seven (3) Three (4) Six (5) None of above
Ans: 3

41. Layer one of the OSI model is
(1) transport layer
(2) link layer
(3) physical layer
(4) network layer
(5) none of above
Ans: 3

42. The x.25 standard specifies a
(1) technique for start-stop data
(2) technique for dial access
(3) data bit rate
(4) DTE/DCE interface
(5) none of above
Ans: 4

43. Which of the following communication modes
support -two-way traffic but in only one direction at a time?
(1) half duplex
(2) simplex
(3) three-quarters duplex
(4) all of the above
(5) none of the above
Ans: 1

44. Wh ch of the following might be used by a company to
satisfy following communications needs?
(1) front end processor
(2) all of the above
(3) controller
(4) concentrator
(5) multiplexer
Ans: 2


45. The interactive transmission of data within a time sharing
system may be best suited to
(1) simplex lines
(2) biflex-lines
(3) full duplex lines
(4) half-duplex lines

Ans: 4

46. Which of the following statement is incorrect?
(1) Batch processing is the prefered processing mode for
telecommunication operation.
(2) Half duplex line is a communication line in which data
can move in two directions, but not at the same time.
(3) Teleprocessing combines telecommunications and DP
techniques in online activities
(4) The difference between synchronous and asynchronous
trans mission is the clocking derived from the
data in synchronous transmission.
Ans: 1

47. Which of hte fallowing is considered a broad band
communication channel?
(1) coaxial cable
(2) fiber optics cable
(3) all of above
(4) microwave circuits
Ans: 3

48. Which of the following is not a transmission medium?
(1) telephone lines
(2). modem
(3) coaxial cables
(4) microwave systems

Ans: 2

49. Which of the following does not allow multiple uses or
devices to share one communication line?
(1) concentrator
(2) multiplexer
(3) doubleplexer
(4) controller
Ans: 3

50. Which of the following signal is not standard RS 232-C
signal?
(1) CIS (2) RTS (3) VDR (4) DSR
Ans: 3

51. Which of the following statement is incorrect?
(1) Multiplexers are designed to accept data from several
I/O devices and transmit a unified stream of. data on one
communication tine
(2) RTS/CTS is the way the terminal indicates ringing
(3) RTS/CTS is the way the DTE indicates that it is ready
to transmit data and the way the DCW indicates that it is
ready to accept data
(4) HDLC is a standard synchronous communication
protocol.

Ans: 2

52. Which of the following is an advantage to using fiber
optics data transmission?
(1) resistance to data theft
(2) fast data transmission rate
(3) all of above
(4) low noise level

Ans: 3

53. Which of the following is required to communicate
between two computers?
(1) all of above including access to transmission medium
(2) protocol
(3) communication hardware
(4) communications software
Ans: 1 

54. The transmission signal coding method of Tl carrier is
called
(1) NRZ (2) Bipolar (3) Manchester (4) Binary
Ans: 2

55. Which data communication method is used to transmit
the data over a serial communication link?
(1) simplex (2) half-duplex (3) None of above
(4) band c (5) full-duplex
Ans: 5

56. What is the minimum number of wires needed to send
data over a serial communication link layer?
(1) 2 (2) 1 (3) 4 (4) 6
(5) none of above
Ans: 2

57. Which of the following types of channels moves data
relatively slowly?
(1) narrow band channel
(2) voice band challen
(3) wide band channel
(4) FTP
Ans: 1

58. Most data communications involving telegraph lines use:
(1) simplex lines
(2) wideband channel
(3) dialed service
(4) narrowband channel
Ans: 4

59. A communications device that combines transmissions
from several I/O devices into one line is a
(1) concentrator
(2) modifier
(3) full-duplex line
(4) multiplexer
Ans: 4

60. How much power (roughly) a light emitting diode can
couple into an optical fiber?
(1) 100 picowatts
(2) 440 microwatts
(3) 100 microwatts
(4) 10 miliwatts
Ans: 3

61. The synchronous modems are more costly than the
asynchronous modems because
(1) they contain clock recovery circuits
(2) they produce large volume of data
(3) they transmit the data with stop and start bits
(4) they operate with a larger bandwidth
(5) none of above
Ans: 1

62. Which of the following statement is correct?
(1) terminal section of a synchronous modem contains the
scrambler
(2) transmission section of a synchronous modern contains
the scrambler
(3) receiver section of a synchronous modem contains the
scrambler
(4) control section of a synchronous modem contains the
scrambler
(5) none of the above
Ans: 2

63. In a synchronous modem, the digital-to-analog
converter transmits signal to the
(1) demodulator
(2) modulator
(3) equilizer
(4) terminal
(5) none of aobve
Ans: 3

64. Which of the following communications lines is best
suited to interactive processing appJIcatjons?
(1) narrow band channel
(2) simplex lines
(3) mixed band channels
(4) full duplex lines
(5) none of the above
Ans: 4

65. A remote batch-processing I operation in which data is
solely input to a central computer would require
(1) telegraphp line
(2) none of the above
(3) mixed bad channel
(4) all of above
(5) simplex lines
Ans: 5

66. A band is always equivalent to
(1) a byte
(2) a bit
(3) 100 bits
(4) none of the above .
(5) all of above
Ans: 4

67. The loss in signal power as light travels down the fiber is
called
(1) interruption
(2) progragation
(3) scattering
(4) attenuation
(5) none of the above
Ans: 4

68. Avalanche photodiode receivers can detect bits of
transmitted data by receiving
(1) 200 photons
(2) 100 photons
(3) 2000 photons
(4) 300 photons'
(5) none of the above
Ans: 1

69. Communiction circuits that transmit data in both
directions but not at the same time are operating in
(1) a simplex mode
(2) all the options
(3) a full duplex mode
(4) a half duplex mode
(5) an asynchronous mode
Ans: 4


70. An example of a medium speed, switched
communications service is
(1) series 1000
(2) data phone 50
(3) All of the above
(4) ODD
(5) none of the above
Ans: 4

71. In communication satellite,multiple repeaters are known as
(1) detector
(2) modulator
(3) transponders
(4) stations
(5) none of the above
Ans: 3

72. While transmitting-odd-parity coded symbols, the number
of zeros in each symbol is
(1) odd
(2) unknown
(3) a and b both
(4) even
(5) none of the above
Ans: 2

73. Data communications monitors available on the software
marked include
(1) TOTAL
(2) ENVIRON/1
(3) BPL
(4) Tel net
(5) none of the above
Ans: 2

74. An exajnple of an analog communication method is
(1) laser beam
(2) microwave
(3) voice grade telephone line
(4) none of the above
(5) all of the above
Ans: 5

75. Number of bits per symbol used in Baudot code is .
(1) 7 (2) 9
(3) 8 (4) 5
(5) none of the above
Ans: 4

76. What is the main difference between DDCMP and
SDLC? .
(1) DDCMP has a message header
(2) DDCMP does not need special hardware to final the
beginning of a message
(3) SDLC has a IP address
(4) SDLC does not use CRC
(5) none of the above
Ans: 2

77. An example of digital, ratherthan analog, communication
is
(1) DOS (2) DDD (3) WATS (4) DOT (5) none of the above
Ans: 1

78. Terminals are required for
(1) real-time, batch processing & time-sharing
(2) real time, timesharing & distributed message
processing
(3) real-time, time sharing & message switching
(4) real time, distributed processing & manager inquiry
(5) none of the above
Ans: 3

79. The receive equilizer reduces delay distortions using a
(1) gearshift
(2) descrambler
(3) tapped delay lines
(4) difference engine
(5) none of the above
Ans: 3

80. Ina synchronous modem, the receive equilizer is known as
(1) impariment equilizer
(2) adaptive equilizer
(3) statistical equilizer
(4) compromise equilizer
(5) none of the above
Ans: 2

81. The channel in the data-communication model can be
(1) postal mail services
(2) telephone lines
(3) none of the above
(4) radio lines (5) all the above
Ans: 5

82. A data terminal serves as an
(1) Effector
(2) sensor
(3) neither a nor b
(4) both a and b
(5) none of the above
Ans: 4

83. Which of the following transmission systems provide the
highest data rate to in individual device?
(1) telephone lines
(2) computer bus
(3) voice and mode
(4) lease lines
(5) none of the above
Ans: 2

84. A protocol is a set of rules governing a time sequence of
events that must take place
(1) between modems
(2) between an interface
(3) between peers
(4) across an interface
(5) none of the above
Ans: 3

85. __ is used in operating system to separate mechanism
from policy
(1) Two level implementation
(2) Single level implementation
(3) Multi level implementation
(4) All of the above
(5) none of the above
Ans: 1

86. The operating system creates.
(1) Virtual computers
(2) All the above
(3) Virtual device
(4) Virtual space
(5) none of the above
Ans: 1

87. from the physical computer__shares characteristics with
both hardware and software
(1) All the above
(2) Software (3) Data
(4) Operating system
(5) none of the above
Ans: 4

88. Multiprogramming systems:
(1) Are easier to develop than single programming systems
(2) Execute more jobs in the same time period
(3) Execute each job faster
(4) Are used only one large mainframe computers.
(5) none of the above
Ans: 2

89. Which is the first program run on a computer when the
computer boots up?
(1) Operating system
(2) System software
(3) System operations
(4) All the above .
(5) none of the above
Ans: 1

90. Which is built directly on the hardware?
(1) Computer Environment
(2) Application Software
(3) Data base System
(4) Opera ti ng System
(5) none of the above
Ans: 4

91. Which of the following-Operating System does not
implement multitasking truly? ^
(1) Windows 98
(2) Windows NT
(3) Windows XP
(4) none of the above
(5) MS DOS
Ans: 5

92. Which runs on computer hardware and serve as platform
for other software to run on?
(1) Application Software
(2) Opera ti ng System
(3) System Software
(4) All the above
(5) none of the above
Ans: 2

93. Which Is the layer of a computer system between the
hardware and the user program
(1) Operating environment
(2) System environment
(3) Operating system
(4) All the above
(5) none of the above
Ans: 3

94. The primary purpose of an operating system Is:
(1) To make computers easier to use
(2) To allow peopleto use the computer,
(3) To keep systems programmers employed
(4) To make the most efficient use of the computer
hardware
(5) none of the above
Ans: 4

95. When a computer is first turned on or restarted, a special
type of absolute.loader called _ is executed
(1) Compile and Go loader
(2) Bootstrap loader
(3) Boot loader
(4) Relating loader
(5) none of the above
Ans: 2

96. Which of the following Operating systems is better for
Implementing a Client-Server network
(1) MS DOS
(2) Windows 2000
(3) Windows 98
(4) Windows 95
(5) none of the above
Ans: 2

97. The operating system manages
(1) all the above
(2) Processes
(3) Disks and I/O devices/
(4) Memory
(5) none of the above
Ans: 1

98. Usually, in MSDOS, the primary hard disk drives has
the drive letter __
(1) A (2) B
(3) D (4) C
(5) none of the above
Ans: 4

99. What is the function of an operating system?
(1) Manages computer's resources very efficiently
(2) Takes care of scheduling jobs for execution
(3) Manages the flow of date and instructions
(4) none of the above
(5) All of the above
Ans: 5

100. Which is not the function of the Operating System?
(1) Memory management
(2) Disk management
(3) Virus Protection
(4) Application management
(5) none of the above
Ans: 3

101. Which Operating System doesn't support networking
between computers?
(1) Windows 95
(2) Windows 3.1
(3) Windows 2000
(4) Windows NT
(5) none of the above
Ans: 2

102.Which Operating System doesn't support long file
names?
(1) MS-DOS
(2) OS/2
(3) Windows 95
(4) Windows NT
(5) none of the above
Ans: 1

103. Which file keeps commands to execute automatically
when OS Is started?
(1) autoexec.bat
(2) any batch file
(3) command.com
(4) config.sys
(5) none of the above

Ans: 1

104. What should be the extension to execute files?
(1) .EXE
(2) .BAT
(3) .COM
(4)  All of the above
(5) none of the above

Ans: 2

कंप्यूटर नेटवर्किंग 100 प्रश्न परीक्षा के लिए

ये बहुत ही महत्वपूर्ण सवाल और कुछ पहले विभिन्न परीक्षा के है।

1. _____terminals (formerly known as cash registers) are

often connected to complex inventory and sales computer systems.
(1) Point-of-sale (POS) (2) Data (3) Sales
(4) Query
(5) None of these

Ans: 1 

2. Smaller and less expensive PC-based servers are
replacing ____ in many busi-nesses.
(1) supercomputers (2) mainframes (3) laptops (4) clients
(5) None of these
Ans: 2

3. DSL is an example of a(n) _____ connection.
(1) network (2) wireless
(3) slow
(4) None of these
(5) broadband
Ans: 5

4. A term used to describe interconnected computer
configuration is
(1) Micro program sequence
(2) Modulation
(3) Multiprocessing
(4) Multiprogramming
(5) None of these
Ans: 4

5. What is required when more than one person uses a
central computer at the same time?
(1) Light pen (2) Mouse (3) Terminal (4) Digitizer
(5) None of these
Ans: 3

6. Multi user systems provided cost savings for small
business because they use a single pro-cessing unit to link
several
(1) Personal computers
(2) Dumb terminals
(3) Workstations
(4) Mainframes
(5) None of these
Ans: 2

7. A dumb terminal has
(1) An embedded micro-proces-
(2) Extensive memory
(3) A keyboard and screen
(4) Independeh I processing
(5) None of these
Ans: 3

8. What is the full form of USB as used in computer related
activities ?
(1) Universal Serial Bus
(2) Ultra Serial Block
(3) United Service Block
(4) Universal Security Block
(5) None of these
Ans: 1

9. A device that connects to a network without the use pf
cables is said to be—
(1) distributed
(2) open source
(3) centralized
(4) wireless
(5) None of these
Ans: 4

10. A ___ is a collection of com-puters and device connected
together.
(1) network
(2) memory card
(3) protocol
(4) central processing unit
(5) None of these Allahabad Bank Clerk Exam, 31.08.2008
Ans: 1

11. Multiplexing involves_ path and _ channel.
(1) one, one
(2) multiple, one
(3) one, multiple
(4) multiple, multiple
(5) None of these
Ans: 3

12. Which one amongst them is not an inter network ?
(1) LAN (2) WAN
(3) MAN
(4) All are internet works
(5) None of these
Ans: 1

13. A proxy server is used for which of the following ?
(1) To provide security against unauthorized users
(2) To provide TCP/IP
(3) To process client requests for datab'ase access
(4) To process client requests for Web pages
(5) None of these
Ans: 4

14. The ability to easily add addi-tional users means that a
net work is
(1) secure
(2) dedicated
(3) decentralized
(4) scalable
(5) None of these
Ans: 4

15. If you wish to extend the length of the network without
having the signal degrade, you would use a
(1) repeater
(2) switch
(3) gateway
(4) router
(5) None of these
Ans: 2

16. A(n) __ is a private corporate network, used exclusively
by company employees.
(1) intranet
(2) local area network
(3) peer-to-peer
(4) Internet
(5) None of these
Ans: 1

17. A characteristic of a file server is which of the following ?
(1) Acts as a fat client and is limited to one PC
(2) Manages file operations and is limited to one PC
(3) Acts as a fat client and is shared on a network
(4) Manages file operations and is shared on a network
(5) None of these
Ans: 4

18. Which of the following terms is just the connection of networks
that can be joined together?
(1) Virtual private network (2) Internet (3) None of these (4) Extranct (5) Intranet
Ans: 5

19. Servers are computers that provide resources to the
other computers connected to a _
(1) Mainframe (2) Network (3) Super computer (4) Client
(5) None of these
Ans: 2

20. The most important or powerful computer in a typical
network is ( Asked SBI Clerk Exam)
(1) desktop
(2) network cliejit
(3) network station
(4) network server
(5) None of these 

Ans: 4

21. To make a notebook act as a desktop model, the
notebook can, be connected to a__ which is connected to a
monitor and other devices.
(1) bay (2) network (3) port (4) docking station
(5) None of these
Ans: 4

22. A set of rules that computer on a network use to communicate
with each other are called
(1) Protocol
(2) Regulations
(3) Rules
(4) Netiquettes
(5) None of these

Ans: 1

23. Which of the following refers to a small, single site
network?
(1) CPJ (2) DSL (3) RAM (4) USB (5) LAN
Ans: 5

24. Computer connected to a LAN {Local Area Network) can
(1) share information and/or share peripheral equipment
(2) go on line (3) run faster (4) E-mail
(5) None of these
Ans: 1

25. The __ is a device that connects n inputstom outputs,
(1) Crosspoint
(2) Crossbar
(3) None of these
(4) RAM
(5) Modem
Ans: 5

26. The sharing of a medium and its path by 2 or more
devices is called _.
(1) Multiplexing
(2) Encoxing
(3) Line discipline
(4) Modulation
(5) None of these
Ans: 1

27. Which multiplexing technique transmits ariatog signals ?
(1) Asynchronous TDM
(2) Synchronous TDM
(3) FDM
(4) Both (2) and (3)
(5) None of these
Ans: 3

28. Network components are connected to the same
cable in the— topology,
(1) mesh (2) ring (3) bus (4) star (5) mixed
Ans: 4

29. Two or more computers connected to each other
for shar-ing information form a ——
(1) pipeline (2) router (3) server (4) tunnel (5) network
Ans: 5

30. Office LANs that are spread geographically apart on a
large scale can be connected using a corporate ——
(1) CAN (2) WAN (3) DAN (4) LAN (5) TAN
Ans: 2

31. For separating channels in FDM, it is necessary to use
(1) Differentiation
(2) Bandpass filters
(3) Time slots
(4) All of the above
(5) None of these
Ans: 3

32. Encryption and decryption are functions of
(1) Transport layer
(2) None of these
(3) Presentation layer
(4) Allot the above
(5) Session layer
Ans: 5

33. Which type of switching uses the entire capacity of a
dedicated link?
(1) Datagram Packet Switch-ing
(2) Virtual Circuit Packet Switching
(3) Circuit switching
(4) Message Switching
(5) None of these
Ans: 1 

34. A peimanent virtual circuit involves
(1) All of the above (2) Data transfer
(3) Connection release
(4) Connection establishment
(5) None of these
Ans: 4

35. X.21 protocol consists of
(1) Only physical level
(2) Frame and packet levels
(3) Physical, frame and pack-et levels
(4) Physical and frame levels
(5) None of these
Ans: 1


36. In OSI network architecture, the dialogue control and
token management are responsibility of
(1) transport layer
(2) network layer
(3) session layer
(4) data link layer
(5) none of above
Ans: 3

37. In OSI network architecture, the routing is performed by
(1) data link layer
(2) network layer
(3) .transport layer
(4) session layer
(5) none of above
Ans: 2

38. Which of the following performs modulation and
demodulation?
(1) modem (2) satellite
(3) coaxial cable
(4) fiber optics
(5) none of the above
Ans: 1

39. The process of converting analog signals into digital
signals so they can be processed by a receiving computer is
referred to as:
(1) modulation
(2) digitising
(3) synchronizing
(4) demodulation
Ans: 2

40. How many OSI layers are covered in the X.25 standard?
(1) Two (2) Seven (3) Three (4) Six (5) None of above
Ans: 3

41. Layer one of the OSI model is
(1) transport layer
(2) link layer
(3) physical layer
(4) network layer
(5) none of above
Ans: 3

42. The x.25 standard specifies a
(1) technique for start-stop data
(2) technique for dial access
(3) data bit rate
(4) DTE/DCE interface
(5) none of above
Ans: 4

43. Which of the following communication modes
support -two-way traffic but in only one direction at a time?
(1) half duplex
(2) simplex
(3) three-quarters duplex
(4) all of the above
(5) none of the above
Ans: 1

44. Wh ch of the following might be used by a company to
satisfy following communications needs?
(1) front end processor
(2) all of the above
(3) controller
(4) concentrator
(5) multiplexer
Ans: 2


45. The interactive transmission of data within a time sharing
system may be best suited to
(1) simplex lines
(2) biflex-lines
(3) full duplex lines
(4) half-duplex lines

Ans: 4

46. Which of the following statement is incorrect?
(1) Batch processing is the prefered processing mode for
telecommunication operation.
(2) Half duplex line is a communication line in which data
can move in two directions, but not at the same time.
(3) Teleprocessing combines telecommunications and DP
techniques in online activities
(4) The difference between synchronous and asynchronous
trans mission is the clocking derived from the
data in synchronous transmission.
Ans: 1

47. Which of hte fallowing is considered a broad band
communication channel?
(1) coaxial cable
(2) fiber optics cable
(3) all of above
(4) microwave circuits
Ans: 3

48. Which of the following is not a transmission medium?
(1) telephone lines
(2). modem
(3) coaxial cables
(4) microwave systems

Ans: 2

49. Which of the following does not allow multiple uses or
devices to share one communication line?
(1) concentrator
(2) multiplexer
(3) doubleplexer
(4) controller
Ans: 3

50. Which of the following signal is not standard RS 232-C
signal?
(1) CIS (2) RTS (3) VDR (4) DSR
Ans: 3

51. Which of the following statement is incorrect?
(1) Multiplexers are designed to accept data from several
I/O devices and transmit a unified stream of. data on one
communication tine
(2) RTS/CTS is the way the terminal indicates ringing
(3) RTS/CTS is the way the DTE indicates that it is ready
to transmit data and the way the DCW indicates that it is
ready to accept data
(4) HDLC is a standard synchronous communication
protocol.

Ans: 2

52. Which of the following is an advantage to using fiber
optics data transmission?
(1) resistance to data theft
(2) fast data transmission rate
(3) all of above
(4) low noise level

Ans: 3

53. Which of the following is required to communicate
between two computers?
(1) all of above including access to transmission medium
(2) protocol
(3) communication hardware
(4) communications software
Ans: 1 

54. The transmission signal coding method of Tl carrier is
called
(1) NRZ (2) Bipolar (3) Manchester (4) Binary
Ans: 2

55. Which data communication method is used to transmit
the data over a serial communication link?
(1) simplex (2) half-duplex (3) None of above
(4) band c (5) full-duplex
Ans: 5

56. What is the minimum number of wires needed to send
data over a serial communication link layer?
(1) 2 (2) 1 (3) 4 (4) 6
(5) none of above
Ans: 2

57. Which of the following types of channels moves data
relatively slowly?
(1) narrow band channel
(2) voice band challen
(3) wide band channel
(4) FTP
Ans: 1

58. Most data communications involving telegraph lines use:
(1) simplex lines
(2) wideband channel
(3) dialed service
(4) narrowband channel
Ans: 4

59. A communications device that combines transmissions
from several I/O devices into one line is a
(1) concentrator
(2) modifier
(3) full-duplex line
(4) multiplexer
Ans: 4

60. How much power (roughly) a light emitting diode can
couple into an optical fiber?
(1) 100 picowatts
(2) 440 microwatts
(3) 100 microwatts
(4) 10 miliwatts
Ans: 3

61. The synchronous modems are more costly than the
asynchronous modems because
(1) they contain clock recovery circuits
(2) they produce large volume of data
(3) they transmit the data with stop and start bits
(4) they operate with a larger bandwidth
(5) none of above
Ans: 1

62. Which of the following statement is correct?
(1) terminal section of a synchronous modem contains the
scrambler
(2) transmission section of a synchronous modern contains
the scrambler
(3) receiver section of a synchronous modem contains the
scrambler
(4) control section of a synchronous modem contains the
scrambler
(5) none of the above
Ans: 2

63. In a synchronous modem, the digital-to-analog
converter transmits signal to the
(1) demodulator
(2) modulator
(3) equilizer
(4) terminal
(5) none of aobve
Ans: 3

64. Which of the following communications lines is best
suited to interactive processing appJIcatjons?
(1) narrow band channel
(2) simplex lines
(3) mixed band channels
(4) full duplex lines
(5) none of the above
Ans: 4

65. A remote batch-processing I operation in which data is
solely input to a central computer would require
(1) telegraphp line
(2) none of the above
(3) mixed bad channel
(4) all of above
(5) simplex lines
Ans: 5

66. A band is always equivalent to
(1) a byte
(2) a bit
(3) 100 bits
(4) none of the above .
(5) all of above
Ans: 4

67. The loss in signal power as light travels down the fiber is
called
(1) interruption
(2) progragation
(3) scattering
(4) attenuation
(5) none of the above
Ans: 4

68. Avalanche photodiode receivers can detect bits of
transmitted data by receiving
(1) 200 photons
(2) 100 photons
(3) 2000 photons
(4) 300 photons'
(5) none of the above
Ans: 1

69. Communiction circuits that transmit data in both
directions but not at the same time are operating in
(1) a simplex mode
(2) all the options
(3) a full duplex mode
(4) a half duplex mode
(5) an asynchronous mode
Ans: 4


70. An example of a medium speed, switched
communications service is
(1) series 1000
(2) data phone 50
(3) All of the above
(4) ODD
(5) none of the above
Ans: 4

71. In communication satellite,multiple repeaters are known as
(1) detector
(2) modulator
(3) transponders
(4) stations
(5) none of the above
Ans: 3

72. While transmitting-odd-parity coded symbols, the number
of zeros in each symbol is
(1) odd
(2) unknown
(3) a and b both
(4) even
(5) none of the above
Ans: 2

73. Data communications monitors available on the software
marked include
(1) TOTAL
(2) ENVIRON/1
(3) BPL
(4) Tel net
(5) none of the above
Ans: 2

74. An exajnple of an analog communication method is
(1) laser beam
(2) microwave
(3) voice grade telephone line
(4) none of the above
(5) all of the above
Ans: 5

75. Number of bits per symbol used in Baudot code is .
(1) 7 (2) 9
(3) 8 (4) 5
(5) none of the above
Ans: 4

76. What is the main difference between DDCMP and
SDLC? .
(1) DDCMP has a message header
(2) DDCMP does not need special hardware to final the
beginning of a message
(3) SDLC has a IP address
(4) SDLC does not use CRC
(5) none of the above
Ans: 2

77. An example of digital, ratherthan analog, communication
is
(1) DOS (2) DDD (3) WATS (4) DOT (5) none of the above
Ans: 1

78. Terminals are required for
(1) real-time, batch processing & time-sharing
(2) real time, timesharing & distributed message
processing
(3) real-time, time sharing & message switching
(4) real time, distributed processing & manager inquiry
(5) none of the above
Ans: 3

79. The receive equilizer reduces delay distortions using a
(1) gearshift
(2) descrambler
(3) tapped delay lines
(4) difference engine
(5) none of the above
Ans: 3

80. Ina synchronous modem, the receive equilizer is known as
(1) impariment equilizer
(2) adaptive equilizer
(3) statistical equilizer
(4) compromise equilizer
(5) none of the above
Ans: 2

81. The channel in the data-communication model can be
(1) postal mail services
(2) telephone lines
(3) none of the above
(4) radio lines (5) all the above
Ans: 5

82. A data terminal serves as an
(1) Effector
(2) sensor
(3) neither a nor b
(4) both a and b
(5) none of the above
Ans: 4

83. Which of the following transmission systems provide the
highest data rate to in individual device?
(1) telephone lines
(2) computer bus
(3) voice and mode
(4) lease lines
(5) none of the above
Ans: 2

84. A protocol is a set of rules governing a time sequence of
events that must take place
(1) between modems
(2) between an interface
(3) between peers
(4) across an interface
(5) none of the above
Ans: 3

85. __ is used in operating system to separate mechanism
from policy
(1) Two level implementation
(2) Single level implementation
(3) Multi level implementation
(4) All of the above
(5) none of the above
Ans: 1

86. The operating system creates.
(1) Virtual computers
(2) All the above
(3) Virtual device
(4) Virtual space
(5) none of the above
Ans: 1

87. from the physical computer__shares characteristics with
both hardware and software
(1) All the above
(2) Software (3) Data
(4) Operating system
(5) none of the above
Ans: 4

88. Multiprogramming systems:
(1) Are easier to develop than single programming systems
(2) Execute more jobs in the same time period
(3) Execute each job faster
(4) Are used only one large mainframe computers.
(5) none of the above
Ans: 2

89. Which is the first program run on a computer when the
computer boots up?
(1) Operating system
(2) System software
(3) System operations
(4) All the above .
(5) none of the above
Ans: 1

90. Which is built directly on the hardware?
(1) Computer Environment
(2) Application Software
(3) Data base System
(4) Opera ti ng System
(5) none of the above
Ans: 4

91. Which of the following-Operating System does not
implement multitasking truly? ^
(1) Windows 98
(2) Windows NT
(3) Windows XP
(4) none of the above
(5) MS DOS
Ans: 5

92. Which runs on computer hardware and serve as platform
for other software to run on?
(1) Application Software
(2) Opera ti ng System
(3) System Software
(4) All the above
(5) none of the above
Ans: 2

93. Which Is the layer of a computer system between the
hardware and the user program
(1) Operating environment
(2) System environment
(3) Operating system
(4) All the above
(5) none of the above
Ans: 3

94. The primary purpose of an operating system Is:
(1) To make computers easier to use
(2) To allow peopleto use the computer,
(3) To keep systems programmers employed
(4) To make the most efficient use of the computer
hardware
(5) none of the above
Ans: 4

95. When a computer is first turned on or restarted, a special
type of absolute.loader called _ is executed
(1) Compile and Go loader
(2) Bootstrap loader
(3) Boot loader
(4) Relating loader
(5) none of the above
Ans: 2

96. Which of the following Operating systems is better for
Implementing a Client-Server network
(1) MS DOS
(2) Windows 2000
(3) Windows 98
(4) Windows 95
(5) none of the above
Ans: 2

97. The operating system manages
(1) all the above
(2) Processes
(3) Disks and I/O devices/
(4) Memory
(5) none of the above
Ans: 1

98. Usually, in MSDOS, the primary hard disk drives has
the drive letter __
(1) A (2) B
(3) D (4) C
(5) none of the above
Ans: 4

99. What is the function of an operating system?
(1) Manages computer's resources very efficiently
(2) Takes care of scheduling jobs for execution
(3) Manages the flow of date and instructions
(4) none of the above
(5) All of the above
Ans: 5

100. Which is not the function of the Operating System?
(1) Memory management
(2) Disk management
(3) Virus Protection
(4) Application management
(5) none of the above
Ans: 3

101. Which Operating System doesn't support networking
between computers?
(1) Windows 95
(2) Windows 3.1
(3) Windows 2000
(4) Windows NT
(5) none of the above
Ans: 2

102.Which Operating System doesn't support long file
names?
(1) MS-DOS
(2) OS/2
(3) Windows 95
(4) Windows NT
(5) none of the above
Ans: 1

103. Which file keeps commands to execute automatically
when OS Is started?
(1) autoexec.bat
(2) any batch file
(3) command.com
(4) config.sys
(5) none of the above

Ans: 1

104. What should be the extension to execute files?
(1) .EXE
(2) .BAT
(3) .COM
(4)  All of the above
(5) none of the above

Ans: 2

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