1.
What is the minimum number of wires needed to send data over it serial communication link layer?
Answer: Option 'B'
2
2.
Which data communication method is used to send data over a serial communication link?
Answer: Option 'C'
full duplex
3.
The interactive transmission of data within a time sharing system may be best suited to…..
Answer: Option 'B'
half duplex lines
4.
Which of the following is an example of a bounded medium?
Answer: Option 'D'
all of these
5.
The area of coverage of a satellite radio beam is called its….
Answer: Option 'C'
footprint
6.
Buffering is ________.
Answer: Option 'A'
the process of temporarily storing the data to allow for small variation in device speeds.
7.
The amount of uncertainty in a system of the symbol is called.
Answer: Option 'B'
entropy
8.
Coaxial cable has conductors with _______.
Answer: Option 'A'
a common axis
9.
Teleprinters _________.
Answer: Option 'C'
have a printer for output and a keyboard for input
10.
Which of the following statements is incorrect?
Answer: Option 'D'
batch processing is the preferred processing mode for telecommunication operations.
11.
What is the main difference between synchronous and asynchronous transmission?
Answer: Option 'C'
clocking is derived from the data in synchronous transmission.
12.
In a synchronous modem, the digital-to-analog converter sends a signal to the _______
Answer: Option 'D'
equalizer
13.
The synchronous modems are more expensive than the asynchronous modems because _______.
Answer: Option 'A'
they must contain clock recovery circuits
14.
How much power (approximately) a light-emitting diode can couple into an optical fiber?
Answer: Option 'B'
100 microwatts
15.
The loss in signal power as light travels down the fiber is called.
Answer: Option 'B'
attenuation
16.
Multiple repeaters in communication satellites are called.
Answer: Option 'C'
transponders
17.
Avalanche photodiode receiver can detect bits of transmitted data by receiving.
Answer: Option 'D'
200 photons
18.
The receive equalizer reduces delay distortions using a _______.
Answer: Option 'B'
tapped delay lines
19.
Which section of a synchronous modem contains the scrambler?
Answer: Option 'D'
Transmission section
20.
The transmission signal coding method for T, the carrier is called _______.
Answer: Option 'B'
Bipolar