Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q661: The theoretical highest bit rate for a telephone line with a bandwidth of 3000 Hz and SNR of 3162 can be calculated using _______.
- A: Nyquist formula
- B: Shannon formula
- C: Both Nyquist and Shannon formulas
- D: Signal-to-noise ratio alone
View Answer
B
Q662: The theoretical channel capacity for a given bandwidth and SNR is calculated using _______.
- A: Nyquist rate
- B: Shannon capacity formula
- C: Signal-to-noise ratio alone
- D: Bandwidth and noise alone
View Answer
B
Q663: If the SNR is very high, what simplification can be made for the Shannon formula?
- A: SNR+1 = SNR
- B: SNR = 1
- C: SNR + Bandwidth = Capacity
- D: The formula becomes irrelevant
View Answer
A
Q664: In the case where the SNR is high, the simplified Shannon capacity formula becomes C = B * SNRdB. What does B stand for?
- A: Bandwidth
- B: Bit rate
- C: Signal-to-noise ratio
- D: Bandwidth and signal strength
View Answer
A
Q665: If the SNR for a channel is 36 dB and the bandwidth is 2 MHz, what would the theoretical channel capacity be?
- A: 30 Mbps
- B: 50 Mbps
- C: 100 Mbps
- D: 120 Mbps
View Answer
A
Q666: If a channel has a bandwidth of 1 MHz and an SNR of 63, which method is used to find the upper limit of the data rate?
- A: Shannon's formula
- B: Nyquist's formula
- C: Both Nyquist and Shannon formulas
- D: Signal-to-noise ratio alone
View Answer
A
Q667: In Example 3.41, the upper limit for the bit rate was found to be 6 Mbps. What is the selected bit rate for better performance?
- A: 6 Mbps
- B: 4 Mbps
- C: 2 Mbps
- D: 1 Mbps
View Answer
B
Q668: When using Shannon’s formula, the highest theoretical bit rate is determined by which factors?
- A: Bandwidth and signal-to-noise ratio
- B: Signal frequency and noise
- C: Noise and bandwidth alone
- D: Only bandwidth and signal level
View Answer
A
Q669: In a noisy channel, the bandwidth is 3000 Hz, and the SNR is 3162. The theoretical highest bit rate is calculated as _______.
- A: 34.86 kbps
- B: 50 kbps
- C: 100 kbps
- D: 200 kbps
View Answer
A
Q670: Which of the following is the primary limitation in achieving the theoretical channel capacity?
- A: High noise levels
- B: Low bandwidth
- C: High signal levels
- D: Low SNR
View Answer
A