If you are not ready to take the exam, have a short review for this topic. Data and Signals summary
Begin and Good luck!
- If the maximum amplitude of a sine wave is 2 V, the minimum amplitude is ________ V.
- A) 2
- B) 1
- C) -2
- D) between -2 and 2
- _________ can impair a signal.
- A) Noise
- B) Attenuation
- C) Distortion
- D) All of the above
- ________is the rate of change with respect to time.
- A) Time
- B) Frequency
- C) Amplitude
- D) Voltage
- A signal is measured at two different points. The power is P1 at the first point and P2 at the second point. The dB is 0. This means ________.
- A) P2 equals P1
- B) P2 is zero
- C) P2 is much larger than P1
- D) P2 is much smaller than P1
- Baseband transmission of a digital signal is possible only if we have a ____ channel.
- A) bandpass
- B) low-pass
- C) high rate
- D) low rate
- ________ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
- A) Distortion
- B) Attenuation
- C) Noise
- D) Decibel
- A sine wave in the ______ domain can be represented by one single spike in the _____ domain.
- A) time; phase
- B) frequency; time
- C) time; frequency
- D) phase; time
- If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?
- A) 5 KHz
- B) 47 KHz
- C) 57 KHz
- D) 10 KHz
- In a time-domain plot, the horizontal axis is a measure of ________.
- A) phase
- B) signal amplitude
- C) frequency
- D) time
- _______ data are continuous and take continuous values.
- A) digital
- B) analog
- C) (a) or (b)
- D) none of the above
- Frequency and period are ______.
- A) proportional to each other
- B) inverse of each other
- C) the same
- D) none of the above
- When propagation speed is multiplied by propagation time, we get the ________.
- A) wavelength of the signal
- B) throughput
- C) distance a signal or bit has traveled
- D) distortion factor
- A _________ sine wave is not useful in data communications; we need to send a _______ signal.
- A) single-frequency; composite
- B) composite; single-frequency This is the correct answer.
- C) single-frequency; double-frequency
- D) none of the above
- The _________ product defines the number of bits that can fill the link.
- A) delay-amplitude
- B) frequency-amplitude
- C) bandwidth-period
- D) bandwidth-delay
- _______ signals can have only a limited number of values.
- A) Digital
- B) Analog
- C) (a) or (b)
- D) None of the above
- Before data can be transmitted, they must be transformed to ________.
- A) periodic signals
- B) electromagnetic signals
- C) aperiodic signals
- D) low-frequency sine waves
- Data can be ________.
- A) digital
- B) analog
- C) (a) or (b)
- D) none of the above
- ________ is a type of transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
- A) Noise
- B) Distortion
- C) Attenuation
- D) Decibel
- Signals can be ________.
- A) digital
- B) analog
- C) either (a) or (b)
- D) neither (a) nor (b)
- A sine wave is ________.
- A) periodic and discrete
- B) aperiodic and discrete
- C) periodic and continuous
- D) aperiodic and continuous
- _______ data have discrete states and take discrete values.
- A) Analog
- B) Digital
- C) (a) or (b)
- D) None of the above
- For a ______ channel, we need to use the Shannon capacity to find the maximum bit rate.
- A) noiseless
- B) noisy
- C) low-pass
- D) bandpass
- What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz?
- A) 1 KHz
- B) 3 MHz
- C) 4 MHz
- D) none of the above
- _____ signals can have an infinite number of values in a range.
- A) Analog
- B) Digital
- C) (a) or (b)
- D) None of the above
- A(n)_________ signal is a composite analog signal with an infinite bandwidth.
- A) digital
- B) analog
- C) either (a) or (b)
- D) neither (a) nor (b)
- A periodic signal completes one cycle in 0.001 s. What is the frequency?
- A) 1 Hz
- B) 100 Hz
- C) 1 KHz
- D) 1 MHz
- The _____ of a composite signal is the difference between the highest and the lowest frequencies contained in that signal.
- A) period
- B) bandwidth
- C) frequency
- D) amplitude
- ________ is a type of transmission impairment in which an outside source such as crosstalk corrupts a signal.
- A) Noise
- B) Distortion
- C) Attenuation
- D) Decibel
- _______ describes the position of the waveform relative to time 0.
- A) Amplitude
- B) Phase
- C) Frequency
- D) Voltage
- Given two sine waves A and B, if the frequency of A is twice that of B, then the period of B is ________ that of A.
- A) one-half
- B) twice
- C) the same as
- D) indeterminate from
- As frequency increases, the period ________.
- A) increases
- B) decreases
- C) doubles
- D) remains the same
- If the available channel is a ____ channel, we cannot send a digital signal directly to the channel.
- A) low-pass
- B) low rate
- C) bandpass
- D) high rate
- For a ______ channel, the Nyquist bit rate formula defines the theoretical maximum bit rate.
- A) low-pass
- B) bandpass
- C) noisy
- D) noiseless
- In a frequency-domain plot, the horizontal axis measures the ________.
- A) phase
- B) frequency
- C) slope
- D) peak amplitude
Back to Homepage
Note: Check your works. Data and Signals - MCQs Answers
credit: Behrouz A. Forouzan©2013 www.FroydWess.com
Tags:
Datacom,
MCQs
0 comments: Post Yours! Read Comment Policy ▼
PLEASE NOTE:
I have Zero Tolerance to Spam. It will be deleted immediately upon review.
Post a Comment