CBSE Class 10 Computer Science Computer Network MCQs

Question. Which of the following statement is incorrect?
a) Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of. data on one communication tine
b) RTS/CTS is the way the terminal indicates ringing
c) 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
d) HDLC is a standard synchronous communication protocol.

Answer : B

Question. Terminals are required for
a) real-time, batch processing & time-sharing
b) real time, timesharing & distributed message processing
c) real-time, time sharing & message switching
d) real time, distributed processing & manager inquiry
e) none of the above

Answer : C

Question. Which data communication method is used to transmit the data over a serial communication link?
a) simplex
b) half-duplex
c) None of above
d) band c
e) full-duplex

Answer : E

Question. What is the minimum number of wires needed to send data over a serial communication link layer?
a) 2
b) 1
c) 4
d) 6
e) none of above

Answer : B

Question. Which of the following types of channels moves data relatively slowly?
a) narrow band channel
b) voice band challen
c) wide band channel

Answer : A

Question. Most data communications involving telegraph lines use:
a) simplex lines
b) wideband channel
c) dialed service
d) narrowband channel

Answer : D

Question. The synchronous modems are more costly than the asynchronous modems because
a) they contain clock recovery circuits
b) they produce large volume of data
c) they transmit the data with stop and start bits
d) they operate with a larger bandwidth
e) none of above

Answer : A

Question. Which of the following statement is correct?
a) terminal section of a synchronous modem contains the scrambler
b) transmission section of a synchronous modern contains the scrambler
c) receiver section of a synchronous modem contains the scrambler
d) control section of a synchronous modem contains the scrambler
e) none of the above

Answer : B

Question. A remote batch-processing I operation in which data is solely input to a central computer would require
a) telegraphp line
b) none of the above
c) mixed bad channel
d) all of above
e) simplex lines

Answer : E

Question. The transmission signal coding method of Tl carrier is called
a) NRZ
b) Bipolar
c) Manchester
d) Binary

Answer : B

Question. A band is always equivalent to
a) a byte
b) a bit
c) 100 bits
d) none of the above .
e) all of above

Answer : D

Question. The loss in signal power as light travels down the fiber is called
a) interruption
b) progragation
c) scattering
d) attenuation
e) none of the above

Answer : D

Question. Avalanche photodiode receivers can detect bits of transmitted data by receiving
a) 200 photons
b) 100 photons
c) 2000 photons
d) 300 photons'
e) none of the above

Answer : A

Question. Communiction circuits that transmit data in both directions but not at the same time are operating in
a) a simplex mode
b) all the options
c) a full duplex mode
d) a half duplex mode
e) an asynchronous mode

Answer : D

Question. An example of a medium speed, switched communications service is
a) series 1000
b) data phone 50
c) All of the above
d) ODD
e) none of the above

Answer : D

Question. In communication satellite,multiple repeaters are known as
a) detector
b) modulator
c) transponders
d) stations
e) none of the above

Answer : C

Question. While transmitting-odd-parity coded symbols, the number of zeros in each symbol is
a) odd
b) unknown
c) a and b both
d) even
e) none of the above

Answer : B

Question. Data communications monitors available on the software marked include
a) TOTAL
b) ENVIRON/1
c) BPL
d) Tel net
e) none of the above

Answer : B

Question. An exajnple of an analog communication method is
a) laser beam
b) microwave
c) voice grade telephone line
d) none of the above
e) all of the above

Answer : E

Question. Number of bits per symbol used in Baudot code is .
a) 7
b) 9
c) 8
d) 5
e) none of the above

Answer : D

Question. Which Is the layer of a computer system between the hardware and the user program
a) Operating environment
b) System environment
c) Operating system
d) All the above
e) none of the above

Answer : C

Question. Which of the following is required to communicate between two computers?
a) all of above including access to transmission medium
b) protocol
c) communication hardware
d) communications software

Answer : A

Question. What is the main difference between DDCMP and SDLC? .
a) DDCMP has a message header
b) DDCMP does not need special hardware to final the beginning of a message
c) SDLC has a IP address
d) SDLC does not use CRC
e) none of the above

Answer : B

Question. Which file keeps commands to execute automatically when OS Is started?
a) autoexec.bat
b) any batch file
c) command.com
d) config.sys
e) none of the above

Answer : A

Question. Ina synchronous modem, the receive equilizer is known as
a) impariment equilizer
b) adaptive equilizer
c) statistical equilizer
d) compromise equilizer
e) none of the above

Answer : B

Question. An example of digital, ratherthan analog, communication is
a) DOS
b) DDD
c) WATS
d) DOT
e) none of the above

Answer : A

Question. Usually, in MSDOS, the primary hard disk drives has the drive letter __
a) A
b) B
c) D
d) C
e) none of the above

Answer : D

Question. The receive equilizer reduces delay distortions using a
a) gearshift
b) descrambler
c) tapped delay lines
d) difference engine
e) none of the above

Answer : C

Question. Which Operating System doesn't support networking between computers?
a) Windows 95
b) Windows 3.1
c) Windows 2000
d) Windows NT
e) none of the above

Answer : B

Question. The primary purpose of an operating system Is:
a) To make computers easier to use
b) To allow peopleto use the computer,
c) To keep systems programmers employed
d) To make the most efficient use of the computer hardware
e) none of the above

Answer : D

Question. The channel in the data-communication model can be
a) postal mail services
b) telephone lines
c) none of the above
d) radio lines
e) all the above

Answer : E

Question. Which of the following transmission systems provide the highest data rate to in individual device?
a) telephone lines
b) computer bus
c) voice and mode
d) lease lines
e) none of the above .

Answer : B

Question. In a synchronous modem, the digital-to-analog converter transmits signal to the
a) demodulator
b) modulator
c) equilizer
d) terminal
e) none of aobve

Answer : C

Question. Which of the following communications lines is best suited to interactive processing appJIcatjons?
a) narrow band channel
b) simplex lines
c) mixed band channels
d) full duplex lines
e) none of the above

Answer : D

Question. __ is used in operating system to separate mechanism from policy
a) Two level implementation
b) Single level implementation
c) Multi level implementation
d) All of the above
e) none of the above

Answer : A

Question. Multiprogramming systems:
a) Are easier to develop than single programming systems
b) Execute more jobs in the same time period
c) Execute each job faster
d) Are used only one large mainframe computers.
e) none of the above

Answer : B

Question. Which Operating System doesn't support long file names?
a) MS-DOS
b) OS/2
c) Windows 95
d) Windows NT
e) none of the above

Answer : A

Question. Which is the first program run on a computer when the computer boots up?
a) Operating system
b) System software
c) System operations
d) All the above .
e) none of the above

Answer : A

Question. What should be the extension to execute files?
a) .EXE
b) All of the above
c) .COM
d) .BAT
e) none of the above

Answer : B

Question. Which of the following-Operating System does not implement multitasking truly? ^
a) Windows 98
b) Windows NT
c) Windows XP
d) none of the above
e) MS DOS

Answer : E

Question. Which of the following is an advantage to using fiber optics data transmission?
a) resistance to data theft
b) fast data transmission rate
c) all of above
d) low noise level

Answer : C

Question. A protocol is a set of rules governing a time sequence of events that must take place
a) between modems
b) between an interface
c) between peers
d) across an interface
e) none of the above

Answer : C

Question. from the physical computer__shares characteristics with both hardware and software
a) All the above
b) Software
c) Data
d) Operating system
e) none of the above

Answer : D

Question. When a computer is first turned on or restarted, a special type of absolute.loader called _ is executed
a) Compile and Go loader
b) Bootstrap loader
c) Boot loader
d) Relating loader
e) none of the above

Answer : B

Question. A communications device that combines transmissions from several I/O devices into one line is a
a) concentrator
b) modifier
c) full-duplex line
d) multiplexer

Answer : D

Question. How much power (roughly) a light emitting diode can couple into an optical fiber?
a) 100 picowatts
b) 440 microwatts
c) 100 microwatts
d) 10 miliwatts

Answer : C

Question. Which of the following Operating systems is better for Implementing a Client-Server network
a) MS DOS
b) Windows 2000
c) Windows 98
d) Windows 95
e) none of the above

Answer : B

Question. Which is built directly on the hardware?
a) Computer Environment
b) Application Software
c) Data base System
d) Opera ti ng System
e) none of the above

Answer : D

Question. The operating system manages
a) all the above
b) Processes
c) Disks and I/O devices/
d) Memory
e) none of the above

Answer : A

Question. Which runs on computer hardware and serve as platform for other software to run on?
a) Application Software
b) Opera ti ng System
c) System Software
d) All the above
e) none of the above

Answer : B

Question. What is the function of an operating system?
a) Manages computer's resources very efficiently
b) Takes care of scheduling jobs for execution
c) Manages the flow of date and instructions
d) none of the above
e) All of the above

Answer : E

Question. A data terminal serves as an
a) Effector
b) sensor
c) neither a nor b
d) both a and b
e) none of the above

Answer : D

Question. Which is not the function of the Operating System?
a) Memory management
b) Disk management
c) Virus Protection
d) Application management
e) none of the above

Answer : C

Question. The operating system creates.
a) Virtual computers
b) All the above
c) Virtual device
d) Virtual space
e) none of the above

Answer : A