Digital Signal Processing Questions and Answers
Q1.
The z-transform of a signal x(n) whose definition is given by \(X(z)=\sum_{n=0}^{\infty} x(n)z^{-n}\) is known as _____
Answer :
Unilateral z-transform
Q2.
What are the values of z for which the value of X(z)=0?
Answer :
Zeros
Q3.
The ROC of z-transform of any signal cannot contain poles.
Answer :
True
Q4.
An ideal filter should have zero gain in their stop band.
Answer :
True
Q5.
The output of the Linear time invariant system cannot contain the frequency components that are not contained in the input signal.
Answer :
True
Q6.
The term ‘bandwidth’ represents the quantitative measure of a signal.
Answer :
True
Q7.
The characteristic of windowing the signal called “Leakage” is the power that is leaked out into the entire frequency range.
Answer :
True
Q8.
The first M-1 values of the output sequence in every step of Overlap save method of filtering of long sequence are discarded.
Answer :
True
Q9.
What is the total number of quantization errors in the computation of single point DFT of a sequence of length N?
Answer :
4N
Q10.
What is the value of the variance of quantization error in FFT algorithm, compared to that of direct computation?
Answer :
Equal
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