Digital Signal Processing Questions and Answers, Set 8

Digital Signal Processing Questions and Answers

Q1. 

For what kind of signals is the one-sided z-transform unique?

Answer : 

Causal signal

Q2. 

Sampling rate conversion by the rational factor I/D is accomplished by what connection of interpolator and decimator?

Answer : 

Cascade

Q3. 

If a system is said to be invertible, then?

Answer : 

One-to-one correspondence between its input and output signals

Q4. 

The ‘Envelope delay’ or ‘Group delay’ is the time delay that the signal component of frequency ω undergoes as it passes from the input to the output of the system.

Answer : 

True

Q5. 

For a signal x(n) to exhibit even symmetry, it should satisfy the condition |X(-ω)|=| X(ω)|.

Answer : 

True

Q6. 

What is the frequency range(in Hz) of the electroencephalogram (EEG)?

Answer : 

0-100

Q7. 

Which of the following is the advantage of the Hanning window over the rectangular window?

Answer : 

Less side lobes

Q8. 

Which of the following is true in the case of the Overlap-Add method?

Answer : 

M-1 zeros are appended at the end of each data block

Q9. 

The 4N quantization errors are mutually uncorrelated.

Answer : 

True

Q10. 

What is the transform that is suitable for evaluating the z-transform of a set of data on a variety of contours in the z-plane?

Answer : 

Chirp-z transform

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