WorksheetsCBSE Class 10 Computer Science Computer Network Quiz
Total questions: 46
Worksheet time: 23mins
Which of the following statement is incorrect?
RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCE indicates that it is ready to accept data
HDLC is a standard synchronous communication protocol
RTS/CTS is the way the terminal indicates ringing
Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line
Terminals are required for?
real-time, time sharing & message switching
real time, time-sharing & distributed message processing
real time, distributed processing & manager inquiry
real-time, batch processing & time-sharing
Which data communication method is used to transmit the data over a serial communication link?
full-duplex
simplex
half-duplex
band
What is the minimum number of wires needed to send data over a serial communication link layer?
6
1
2
4
Which of the following types of channels moves data relatively slowly?
none of the above
voice band channel
wide band channel
narrow band channel
Most data communications involving telegraph lines use?
dialed service
wideband channel
simplex lines
narrowband channel
The synchronous modems are more costly than the asynchronous modems because?
they operate with a larger bandwidth
they transmit the data with stop and start bits
they produce large volume of data
they contain clock recovery circuits
Which of the following statement is correct?
terminal section of a synchronous modem contains the scrambler
control section of a synchronous modem contains the scrambler
transmission section of a synchronous modem contains the scrambler
receiver section of a synchronous modem contains the scrambler
A remote batch-processing operation in which data is solely input to a central computer would require?
simplex lines
mixed band channel
telegraph line
all of above
The transmission signal coding method of T1 carrier is called?
Binary
NRZ
Bipolar
Manchester
A band is always equivalent to?
a byte
a bit
none of the above
100 bits
The loss in signal power as light travels down the fiber is called?
propagation
interruption
attenuation
scattering
Avalanche photodiode receivers can detect bits of transmitted data by receiving?
200 photons
100 photons
2000 photons
300 photons
Communication circuits that transmit data in both directions but not at the same time are operating in?
a half duplex mode
a full duplex mode
a simplex mode
an asynchronous mode
An example of a medium speed, switched communications service is?
ODD
data phone 50
series 1000
none of the above
In communication satellite, multiple repeaters are known as?
transponders
detector
modulator
stations
While transmitting odd-parity coded symbols, the number of zeros in each symbol is?
none of the above
even
unknown
odd
Data communications monitors available on the software market include?
Telnet
BPL
ENVIRON/1
TOTAL
An example of an analog communication method is?
none of the above
voice grade telephone line
microwave
laser beam
Number of bits per symbol used in Baudot code is?
7
9
8
5
Which is the layer of a computer system between the hardware and the user program?
All the above
Operating environment
System environment
Operating system
Which of the following is required to communicate between two computers?
communication hardware
protocol
communications software
all of above including access to transmission medium
What is the main difference between DDCMP and SDLC?
DDCMP does not need special hardware to find the beginning of a message
SDLC has an IP address
DDCMP has a message header
SDLC does not use CRC
Which file keeps commands to execute automatically when OS is started?
config.sys
command.com
any batch file
autoexec.bat
In a synchronous modem, the receive equalizer is known as?
compromise equalizer
impairment equalizer
adaptive equalizer
statistical equalizer
An example of digital, rather than analog, communication is?
DOS
DDD
WATS
DOT
Usually, in MSDOS, the primary hard disk drive has the drive letter?
A
B
D
C
The receive equalizer reduces delay distortions using?
difference engine
gearshift
descrambler
tapped delay lines
Which Operating System doesn't support networking between computers?
Windows 2000
Windows 3.1
Windows NT
Windows 95
The primary purpose of an operating system is?
To keep systems programmers employed
To make the most efficient use of the computer hardware
To make computers easier to use
To allow people to use the computer
The channel in the data-communication model can be?
all the above
radio lines
telephone lines
postal mail services
Which of the following transmission systems provide the highest data rate to an individual device?
lease lines
voice and modem
computer bus
telephone lines
In a synchronous modem, the digital-to-analog converter transmits signal to the?
demodulator
modulator
terminal
equalizer
Which of the following communications lines is best suited to interactive processing applications?
simplex lines
mixed band channels
full duplex lines
narrow band channel
__ is used in operating system to separate mechanism from policy?
All of the above
Multi level implementation
Single level implementation
Two level implementation
Multiprogramming systems?
Are used only on large mainframe computers
Execute more jobs in the same time period
Are easier to develop than single programming systems
Execute each job faster
Which Operating System doesn't support long file names?
Windows NT
Windows 95
OS/2
MS-DOS
Which is the first program run on a computer when the computer boots up?
All the above
System operations
System software
Operating system
What should be the extension to execute files?
.ALL
.BAT
.COM
.EXE
Which of the following Operating Systems does not implement multitasking truly?
Windows 98
Windows NT
Windows XP
MS DOS
Which of the following is an advantage to using fiber optics data transmission?
low noise level
fast data transmission rate
resistance to data theft
all of the above
A protocol is a set of rules governing a time sequence of events that must take place?
across an interface
between peers
between an interface
between modems
From the physical computer, __ shares characteristics with both hardware and software?
Operating system
All the above
Software
Data
When a computer is first turned on or restarted, a special type of absolute loader called __ is executed?
Relating loader
Bootstrap loader
Boot loader
Compile and Go loader
A communications device that combines transmissions from several I/O devices into one line is a?
multiplexer
concentrator
modifier
full-duplex line
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