Data Communication & Networking Mcqs-SET 01

Question:1  Number of bits per symbol used in Baudot code is

a. 7

b. 5

c. 8

d. 9

Ans b

Question 2: An example of digital, rather than analogue, communication is

a. DDD

b. DDS

c. WATS

d. DDT

Ans b

Question 3:Terminals are required for 

a. real-time, batch processing & time-sharing

b. real time, time-sharing & distributed message processing

c. real time, distributed processing & manager inquiry

d. real-time,  time sharing & message switching

 Ans d

Question 4:The receive equalizer reduces delay distortions using a

a. tapped delay lines

b. gearshift

c. descrambler

d. difference engine

Ans a

Question 5:In a synchronous modem, the receive equalizer is known as

a. adaptive equalizer

b. impairment equalizer

c. statistical equalizer

d. compromise equalizer 

 Ans a

Question 6:The channel in the data communication model can be

a. postal mail services

b. telephone lines

c. radio lines

d. any of the above

Ans d

Question 7:A data terminal serves as an

a. Effector

b. sensor

c. both a and b

d. neither a nor b

 Ans c

Question 8:Which of the following transmission systems provide the highest data rate to in individual device?

a. computer bus

b. telephone lines

c. voice and mode

d. lease lines

 Ans a

Question:9  A remote batch-processing operation in which data is solely input to a central computer would require

a. telegraph line

b. simplex lines

c. mixed bad channel

d. all of above

 Ans b

Question 10  A band is always equivalent to 

a. a byte

b. a bit

c. 100 bits

d. none of above

 Ans d

Question 11:The loss in signal power as light travels down the fiber is called

a. attenuation

b. progragation

c. scattering

d. interruption

Ans a

Question 12: Communication circuits that transmit data in both directions but not at the same time are operating in

a. a simplex mode

b. a half duplex mode

c. a full duplex mode

d. an asynchronous mode

 Ans b

Question 13: An example of a medium speed, switched communications service is

a. series 1000

b. data phone 50

c. DDD

d. All of the above

 Ans c

Question 14: In communication satellite, multiple repeaters are known as

a. detector

b. modulator

c. stations

d. transponders

 Ans d

Question 15:While transmitting odd-parity coded symbols, the number of zeros in each symbol is

a. odd

b. even

c. a and b both

d. unknown

 Ans d

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