Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q641: If the power of the signal is 10 mW and the noise is 1 μW, the SNR can be converted to SNRdB by using the formula _______.
- A: SNRdB = 10 * log10(SNR)
- B: SNRdB = log10(SNR)
- C: SNRdB = 20 * log10(SNR)
- D: SNRdB = log2(SNR)
View Answer
A
Q642: The data rate over a channel depends on which of the following factors?
- A: Bandwidth, signal level, and noise
- B: Only signal level and noise
- C: Only bandwidth and noise
- D: Only bandwidth and signal level
View Answer
A
Q643: The theoretical formula developed by Nyquist calculates the data rate for a _______ channel.
- A: Noisy
- B: Noiseless
- C: Low-bandwidth
- D: High-bandwidth
View Answer
B
Q644: The Shannon capacity formula is used to calculate the data rate for a _______ channel.
- A: Noisy
- B: Noiseless
- C: Low-bandwidth
- D: High-bandwidth
View Answer
A
Q645: In a noiseless channel, what is the theoretical maximum bit rate determined by?
- A: Nyquist Rate
- B: Shannon Capacity
- C: Bandwidth Factor
- D: Signal to Noise Ratio
View Answer
A
Q646: The Nyquist rate formula calculates the maximum bit rate for a noiseless channel by considering _______.
- A: Signal levels and bandwidth
- B: Noise and bandwidth
- C: Signal frequency and noise
- D: Only bandwidth
View Answer
A
Q647: In the example with a bandwidth of 3000 Hz and two signal levels, the maximum bit rate can be calculated as _______.
- A: 6000 bits per second
- B: 3000 bits per second
- C: 1500 bits per second
- D: 12000 bits per second
View Answer
A
Q648: If a signal has four signal levels and the bandwidth of the channel is 3000 Hz, the maximum bit rate can be calculated as _______.
- A: 6000 bits per second
- B: 12000 bits per second
- C: 3000 bits per second
- D: 24000 bits per second
View Answer
B
Q649: If a noisy channel has a bandwidth of 5000 Hz and a signal-to-noise ratio (SNR) of 30 dB, the Shannon capacity can be calculated using _______.
- A: Nyquist formula
- B: Shannon formula
- C: Both Nyquist and Shannon formulas
- D: Bandwidth and signal level
View Answer
B
Q650: The Shannon capacity formula considers which of the following factors?
- A: Bandwidth and signal-to-noise ratio
- B: Only bandwidth
- C: Only signal levels
- D: Only noise level
View Answer
A