WorksheetsDigital Communication Encoding Quiz
Total questions: 10
Worksheet time: 5mins
In NRZ encoding, the signal:
Changes to zero during the bit period.
Stays at a constant level during the bit period.
Alternates between high and low.
Fluctuates up and down during the bit period.
In RZ encoding, the signal:
Stays high for the entire bit period.
Returns to zero halfway through the bit period.
Always stays low.
Does not return to zero.
What is one disadvantage of NRZ encoding?
It is easy to synchronize.
It can be hard to detect the signal if there are long sequences of 1s or 0s.
It always changes direction.
It requires no bandwidth.
Which of the following encoding schemes has a signal that returns to zero during the bit period?
NRZ
RZ
Manchester
Bipolar
Which of the following is true for NRZ encoding?
The signal does not return to zero.
The signal fluctuates between high and low during the bit period.
The signal alternates between 1 and 0 every half bit period.
The signal always stays at zero.
In NRZ encoding, a '1' is represented by:
A high voltage throughout the bit period.
A low voltage throughout the bit period.
A high voltage for half the bit period, then low.
A high voltage for half the bit period, then returns to zero.
In RZ encoding, a '1' is represented by:
A low voltage for the entire bit period.
A high voltage for the first half, then a zero voltage.
A high voltage for the entire bit period.
A low voltage for half the bit period.
What is the main purpose of line coding in digital communication?
To convert analog signals into digital signals
To represent digital data in a form suitable for transmission over a communication medium
To reduce the data transmission rate
To filter high-frequency noise from the signal
Which of the following is true for Unipolar line coding?
It uses positive, zero, and negative voltage levels.
It uses only one voltage level, typically positive.
It uses two voltage levels, positive and negative.
The signal alternates between positive and zero voltage levels.
Return to Zero (RZ) encoding requires which of the following?
A transition at the middle of each bit period.
A constant voltage for each bit.
A zero voltage for the entire bit period.
A return to zero before the end of each bit period.
