Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q861: Which of the following is the purpose of sampling in PCM?
- A: To convert an analog signal to a digital signal
- B: To compress data
- C: To encrypt data
- D: To modulate the signal
View Answer
A
Q862: Sampling rate refers to the _______ at which samples are taken from the continuous signal.
- A: frequency
- B: amplitude
- C: phase
- D: distance
View Answer
A
Q863: Which of the following determines the frequency of sampling in Pulse Code Modulation?
- A: Sampling theorem
- B: Signal frequency
- C: Signal amplitude
- D: Signal strength
View Answer
A
Q864: What is the relationship between the sampling rate and the Nyquist frequency?
- A: The sampling rate must be at least twice the Nyquist frequency.
- B: The sampling rate should be less than the Nyquist frequency.
- C: The sampling rate equals the Nyquist frequency.
- D: There is no relationship.
View Answer
A
Q865: Sampling in Pulse Code Modulation helps to convert an _______ signal into a discrete signal.
- A: analog
- B: digital
- C: encrypted
- D: encoded
View Answer
A
Q866: Which of the following is true about the sampling process in Pulse Code Modulation?
- A: The signal is continuously measured at a constant rate.
- B: The signal is sampled at random intervals.
- C: The signal is only measured once.
- D: None of the above
View Answer
A
Q867: In Pulse Code Modulation (PCM), the process of quantization refers to _______.
- A: approximating the amplitude of the signal to the nearest value
- B: encoding the signal into digital form
- C: sampling the signal at intervals
- D: decoding the signal into its original form
View Answer
A
Q868: Quantization in PCM is used to convert _______ values into discrete levels.
- A: analog
- B: digital
- C: integer
- D: continuous
View Answer
A
Q869: The purpose of quantization in PCM is to reduce the _______ of the signal.
- A: frequency
- B: amplitude
- C: complexity
- D: precision
View Answer
B
Q870: Quantization involves mapping a continuous range of values into _______.
- A: a finite set of discrete levels
- B: an infinite set of values
- C: a set of digital signals
- D: none of the above
View Answer
A