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MCQs

Total Questions : 106 | Page 1 of 11 pages
Question 1. The interface between an analog signal and a digital processor is
  1.    D/A converter
  2.    A/D converter
  3.    Modulator
  4.    Demodulator
 Discuss Question
Answer: Option B. -> A/D converter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. Telegraph signals are examples of
  1.    Digital signals
  2.    Analog signals
  3.    Impulse signals
  4.    Pulse train
 Discuss Question
Answer: Option A. -> Digital signals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. A discrete time signal may be
1) Samples of a continuous signal
2) A time series which is a domain of integers
3) Time series of sequence of quantities
4) Amplitude modulated wave
  1.    1, 2 and 3 are correct
  2.    1 and 2 are correct
  3.    1 and 3 are correct
  4.    All the four are correct
 Discuss Question
Answer: Option A. -> 1, 2 and 3 are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. As compared to the analog systems, the digital processing of signals allow
1) Programmable operations
2) Flexibility in the system design
3) Cheaper systems
4) More reliability
  1.    1, 2 and 3 are correct
  2.    1 and 2 are correct
  3.    1, 2 and 4 are correct
  4.    All the four are correct
 Discuss Question
Answer: Option D. -> All the four are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. The speech signal is obtained after
  1.    Analog to digital conversion
  2.    Digital to analog conversion
  3.    Modulation
  4.    Quantization
 Discuss Question
Answer: Option B. -> Digital to analog conversion
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. Roll-off factor is
  1.    The bandwidth occupied beyond the Nyquist Bandwidth of the filter
  2.    The performance of the filter or device
  3.    Aliasing effect
  4.    None of the above
 Discuss Question
Answer: Option A. -> The bandwidth occupied beyond the Nyquist Bandwidth of the filter
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. DTFT is the representation of
  1.    Periodic Discrete time signals
  2.    Aperiodic Discrete time signals
  3.    Aperiodic continuous signals
  4.    Periodic continuous signals
 Discuss Question
Answer: Option B. -> Aperiodic Discrete time signals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. The Nyquist theorem for sampling
1) Relates the conditions in time domain and frequency domain
2) Helps in quantization
3) Limits the bandwidth requirement
4) Gives the spectrum of the signal
  1.    1, 2 and 3 are correct
  2.    1 and 2 are correct
  3.    1 and 3 are correct
  4.    All the four are correct
 Discuss Question
Answer: Option C. -> 1 and 3 are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. The transforming relations performed by DTFT are
1) Linearity
2) Modulation
3) Shifting
4) Convolution
  1.    1, 2 and 3 are correct
  2.    1 and 2 are correct
  3.    1 and 3 are correct
  4.    All the four are correct
 Discuss Question
Answer: Option D. -> All the four are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The DFT is preferred for
1) Its ability to determine the frequency component of the signal
2) Removal of noise
3) Filter design
4) Quantization of signal
  1.    1, 2 and 3 are correct
  2.    1 and 2 are correct
  3.    1 and 3 are correct
  4.    All the four are correct
 Discuss Question
Answer: Option C. -> 1 and 3 are correct
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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