**DSP MCQ set 2:- **Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf.

**Q1.For what kind of signals one-sided z-transform is unique?**

- (A) All signals
- (B) Anti-causal signal
- (C) Causal signal
- (D) Linear

**Ans:- (C) Causal signal**

**Q2. If X1(k) and X2(k) are the N-point DFTs of X1(n) and x2(n) respectively,then what is the N-point DFT of x(n)=ax1(n)+bx2(n)?**

- (A) X1(ak)+X2(bk)
- (B) aX1(k)+bX2(k)
- (C) akX1(k)+bkX2(k)
- (D) X1(ak)-X2(bk)

**Ans:- (B) aX1(k)+bX2(k)**

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**Q3. Digital angular frequency has a unit**

- (A) radian per second
- (B) radian per samples
- (C) No unit
- (D) Hz

**Ans:-(B) radian per samples**

**Q4. Type of digital crossover**

- (A) Active
- (B) Passive
- (C) Active and Passive
- (D) Static and Dynamic

**Ans:- (C) Active and Passive**

**Q5. condition for orthogonality of vectors**

- (A) Inner product Zero
- (B) Inner product 1
- (C) outer product 1
- (D) Magnitude 1

**Ans:- (A) Inner product Zero **

**Q6. The speech signal is obtained after**

- (A) Analog to digital conversion
- (B) Digital to analog conversion
- (C) Modulation
- (D) Quantization

**Ans:- (B) Digital to analog conversion**

**Q7. Which of the following techniques are NOT used to convert analog filterto digital filter**

- (A) Successive Approximation
- (B) Impulse Invariant
- (C) Approximation of Derivatives
- (D) Bilinear Transformation

**Ans:- (A) Successive Approximation**

**Q8. Which of the following is done to convert a continuous-time signal intodiscrete-time signal?**

- (A) Modulating
- (B) Sampling
- (C) Differentiating
- (D) Integrating

**Ans:- (B) Sampling**

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**Q9. Normalized frequency of discrete-time signal has a maximum value**

- (A) infinite
- (B) 0.5
- (C) 1
- (D) 1.5

**Ans:- (B) 0.5**

**Q10. IIR Filter design methods are based on different mapping functions usedfor mapping the following domains**

- (A) DFT to Z domain
- (B) S domain to Z domain
- (C) Z domain to S domain
- (D) Z domain to DFT

**Ans:- (B) S domain to Z domain**

**Q11. The transfer function of IIR Filters contains**

- (A) Only Zeros
- (B) Only Poles
- (C) Poles and Zeros
- (D) Neither Poles or Zeros

**Ans:- (C) Poles and Zeros**

**Q12. The Chebyshev filters have**

- (A) Flat passband and Flat stopband
- (B) Flat stopband and Tapering stopband
- (C) Flat stopband and Equiripple stopband
- (D) Flat passband and Equiripple stopband

**Ans:- (C) Flat stopband and Equiripple stopband**

**Q13. Which filter is present in the DSP system**

- (A) band stop
- (B) High pass
- (C) Aliasing
- (D) Anti aliasing

**Ans:- (D) Anti-aliasing **

**Q14. What is the set of all values of z for which X(z) attains a finite value?**

- (A) Radius of convergence
- (B) Radius of divergence
- (C) Feasible solution
- (D) Region of convergence

**Ans:- (C) Region of convergence**

**Q15. Which of the following method is not used to find the inverse z-transformof a signal?**

- (A) Counter integration
- (B) Expansion into a series of terms
- (C) Partial fraction expansion
- (D) Matrix Multiplication Method

**Ans:- (D) Matrix Multiplication Method**

**Q16. For a decimation-in-time FFT algorithm, which of the following is true?**

(A) Both input and output are in order

(B) Both input and output are shuffled

(C) Input is shuffled and output is in order

(D) None of the above

**Ans:- (C) Input is shuffled and output is in order **

**Q17. Basis functions for Fourier transform are**

(A) square

(B) Triangular

(C) Cos & sin

(D) cosine

**Ans:- (C) Cos & sin **

**Q18. Digital Active cross over includes**

(A) LPF & HPF

(B) LPF

(C) HPF

(D) BPF

**Ans:- (A) LPF & HPF**

**Q19. Which of the following is used after DAC and DEMUX in Voice decoders**

(A) Balance Modulator

(B) Amplifier

(C) MUX

(D) DEMUX

**Ans:- (A) Balance Modulator **

**Q20. The poles of a Butterworth filter lie on a ———– and poles of a Chebyshev filter lie on a ————-**

(A) Ellipse, Circle

(B) Ellipse, Trapezoid

(C) Circle, Circle

(D) Circle, Ellipse

**Ans:- (D) Circle, Ellipse **

**Q21. The large side lobes of W(ω) results in which of the following undesirable effects?**

(A) Circling effects

(B) : Broadening effects

(C) Ringing effects

(D) quantization

**Ans:- (C) Ringing effects **

**Q22. Which of the following is True regarding stability of IIR filters?**

(A) IIR filters are always stable

(B) Number of Zeros in transfer function of IIR filter determines stability

(C) Stability is independent of presence of poles and zeros

(D) IIR fiter can tend to become unstable due to presence of poles

**Ans:- (D) IIR fiter can tend to become unstable due to presence of poles **

**Q23. A linear time invariant system is said to be BIBO stable if and only if the ROC of the system function**

(A) Includes unit circle

(B) Excludes unit circle

(C) Is an unit circle

(D) In Z plane

**Ans:- (A) Includes unit circle **

**Q24. Mapping of points from the s-plane to the z-plane is implied by the relation**

(A) z=e*s*T where T represents sampling interval

(B) z = e/(s*T) where T represents sampling interval

(C) z= e+s+T where T represents sampling interval

(D) z = esT where T represents sampling interval

**Ans:- D) z = esT where T represents sampling interval **

**Q25. ECG have frequency range from**

(A) 0.5Hz to 80 Hz

(B) 20 Hz to 20KHz

(C) 1Hz to 10Hz

(D) 10 Hz to 1 KHz

**Ans:- A) 0.5Hz to 80 Hz **

**See More** :- Digital Signal Processing Important MCQ Set 1 (DSP),

**DSP MCQ set 2:-** Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf.

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