Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q471: Fill in the blank: The frequency-domain plot shows multiple sine waves as _______.
- A: Spikes
- B: Curves
- C: Sinusoids
- D: Squares
View Answer
A
Q472: A time-domain plot is most useful for _______.
- A: Showing changes in signal amplitude over time
- B: Showing multiple sine waves at once
- C: Identifying the phase of signals
- D: Analyzing frequency differences
View Answer
A
Q473: Composite signals are made by combining _______.
- A: Multiple sine waves
- B: Multiple square waves
- C: Single sine waves
- D: A combination of analog and digital signals
View Answer
A
Q474: Fill in the blank: A power company uses a _______ sine wave with a frequency of 60 Hz to distribute electric energy.
- A: Simple
- B: Composite
- C: Complex
- D: Digital
View Answer
A
Q475: Which of the following is NOT true about a time-domain plot?
- A: It shows the amplitude of a signal with respect to time.
- B: It is most useful for representing multiple sine waves.
- C: It does not explicitly show phase.
- D: It is a plot of amplitude versus time.
View Answer
B
Q476: Fill in the blank: In a frequency-domain plot, the sine wave with the highest amplitude will appear as the _______.
- A: Tallest spike
- B: Widest spike
- C: Shortest spike
- D: Farthest spike
View Answer
A
Q477: A composite signal is created by adding together multiple _______.
- A: Simple sine waves
- B: Complex signals
- C: Digital signals
- D: Analog waves
View Answer
A
Q478: The time-domain plot of a sine wave represents the variation of _______ over time.
- A: Frequency
- B: Phase
- C: Amplitude
- D: Speed
View Answer
C
Q479: The frequency-domain plot is best used when _______ is of interest.
- A: Representing many sine waves simultaneously
- B: Analyzing a single sine wave
- C: Displaying phase shifts
- D: Observing amplitude changes
View Answer
A
Q480: The frequency of a sine wave can be measured by observing the _______ in the time-domain plot.
- A: Time it takes to complete one cycle
- B: Amplitude of the wave
- C: Phase of the wave
- D: Frequency shift
View Answer
A