Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q651: The Nyquist formula assumes _______ levels of signal.
- A: Two or more
- B: Four or more
- C: Only one level
- D: Any number of levels
View Answer
A
Q652: In a channel with a bandwidth of 3000 Hz and four signal levels, what is the maximum bit rate according to the Nyquist formula?
- A: 12000 bits per second
- B: 6000 bits per second
- C: 3000 bits per second
- D: 1500 bits per second
View Answer
A
Q653: According to Shannon's formula, if the noise is reduced to zero, the capacity of the channel becomes _______.
- A: Infinite
- B: Zero
- C: Limited
- D: Negligible
View Answer
A
Q654: The Nyquist rate formula is ideal for calculating data rate in a _______ channel.
- A: Noiseless
- B: Noisy
- C: Low-frequency
- D: High-frequency
View Answer
A
Q655: If the bandwidth of a channel is doubled, what happens to the maximum data rate in a noiseless channel according to the Nyquist formula?
- A: It doubles
- B: It triples
- C: It stays the same
- D: It halves
View Answer
A
Q656: Who introduced the formula to determine the theoretical highest data rate for a noisy channel?
- A: Nyquist
- B: Claude Shannon
- C: Albert Einstein
- D: Thomas Edison
View Answer
B
Q657: What does Shannon's formula determine in a noisy channel?
- A: The signal strength
- B: The theoretical highest data rate
- C: The maximum signal-to-noise ratio
- D: The number of signal levels
View Answer
B
Q658: If the signal-to-noise ratio is almost zero, the capacity of the channel will be _______.
- A: Infinite
- B: Zero
- C: Limited to bandwidth
- D: Dependent on signal level
View Answer
B
Q659: In practice, which two formulas are used to determine the limits and signal levels of a channel?
- A: Nyquist and Shannon
- B: Nyquist and SNR formula
- C: Shannon and SNR formula
- D: Shannon and Bandwidth formula
View Answer
A
Q660: What happens to the channel capacity when the signal-to-noise ratio (SNR) is very low?
- A: It becomes very high
- B: It becomes zero
- C: It increases dramatically
- D: It stays constant
View Answer
B