Digital Signal Processing MCQ (Multiple Choice Questions)

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Digital Signal Processing MCQ Set 1:- Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf download.

Q1.If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?

  • X(-k)
  • -X(k)
  • X(k)
  • -X(-k)

Ans:- C : X(k)

Q2. DFT is applied to

  • Infinite sequences
  • Finite discrete sequences
  • Continuous infinite signals
  • Continuous finite sequences

Ans:- Finite discrete sequences

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Q3. The Elliptic filters have

  • Flat pass band and Equiripple stop band
  • Flat stop band and Equiripple pass band
  • Flat stop band and Flat pass band
  • Equiripple pass band and Equiripple stop band

Ans:- Equiripple passband and Equiripple stopband

Q4. In Digital Active cross Preamplifier is used after

  • Source
  • Digital Active crossover
  • Amplification
  • Output

Ans:- Source

Q5. An analog LTI system with system function H(s) is stable

  • If all its poles lie in the left half of the S Plane
  • If all its zeros lie in the right half of the S Plane
  • If all its poles lie in the right half of the S Plane
  • If all its zeros lie in the left half of the S Plane

Ans:- If all its poles lie in the left half of the S Plane

Q6. Role of the Anti-aliasing filter is to remove

  • low frequency
  • high frequency
  • medium frequency
  • All frequency

Ans:- high frequency

Q7. Impulse Response of an IIR filter is

  • Finite duration
  • Infinite duration
  • Limited to the fundamental period
  • Equal to system function

Ans:- Infinite duration

Q8. A vocoder consists of

  • Only Encoder
  • Only decoder
  • Both encoder and decoder
  • Encrypt and Decrypt

Ans:- Both encoder and decoder

Q9. In Overlap add method, what is the length of each input data block?

  • L-1
  • L
  • L+1
  • L+2

Ans:- L

Q10.The circular convolution of two sequences in time domain is
equivalent to

  • Multiplication of DFTs of two sequences
  • Summation of DFTs of two sequences
  • Difference of DFTs of two sequences
  • Square of multiplication of DFTs of two sequences

Ans:- Multiplication of DFTs of two sequences

Q11. The IIR Filter designing process involves

  • Designing of digital filter in analog domain and tranforming into digital domain
  • Designing of digital filter in digital domain and tranforming into analog domain
  • Designing of analog filter in analog domain and tranforming into digital domain
  • Designing the Digital filter directly with no conversions

Ans:- Designing of digital filter in analog domain and tranforming into digital domain

Q12. Which of the following is true in case of Overlap add method?

  • M zeros are appended at last of each data block
  • M zeros are appended at first of each data block
  • M-1 zeros are appended at last of each data block
  • M-1 zeros are appended at first of each data block

Ans:- M-1 zeros are appended at last of each data block

Q13. Consider the assertions given below. Which among them is an advantage of FIR Filter?

  • Necessity of computational techniques for filter implementation
  • Presence of linear phase response
  • Requirement of large storage
  • Incapability of simulating prototype analog filters

Ans:- Presence of linear phase response

Q14. If all the poles of H(z) are outside the unit circle, then the system is said to be

  • Only causal
  • Only BIBO stable
  • BIBO stable and causal
  • BIBO Unstable

Ans:- BIBO Unstable

Q15. Which frequency is calculated in Vibration Analysis for Defective Gear Teeth

  • Low frequency
  • Meshing Frequency
  • High Frequency
  • Medium frequency

Ans:- Meshing Frequency

Q16. Volume control can be done digitally at

  • Source
  • Digital cross over
  • Source and Digital cross over
  • Speaker

Ans:- Digital cross over

Q17. Which one of the structures is NOT used for realisation of a digital IIR filter?

  • Direct Form 1&2
  • Lattice Form
  • Cascade Form
  • Parallel Form

Ans:- Lattice Form

Q18. ECG signal is corrupted with

  • Channel Noise
  • Contact Noise
  • Channel Noise and Contact Noise
  • Interference Noise

Ans:- Channel Noise and Contact Noise

Q19. Power line interference in ECG introduces frequency components of

  • 50 Hz to 60Hz
  • 60Hz to 70Hz
  • 10 Hz to 20Hz
  • 20Hz to 40Hz

Ans:- 50 Hz to 60Hz

Q20. Frequency Discriminator in Voice encoders are used before

  • LPF
  • HPF
  • ADC & Mux
  • DAC

Ans:- ADC & Mux

Q21. If all the poles of H(z) are inside the unit circle, then the system is said to be

  • Only causal
  • BIBO stable and causal
  • BIBO causal
  • Only BIBO stable

Ans:- BIBO stable and causal

See More:- Digital Signal Processing Important MCQ Set 2 (DSP)

Power Electronics MCQs 1

Digital Signal Processing MCQ Set 1:- Questions and answers are much important for any interviews of Digital Signal processing. Join Our Telegram Channel For pdf download.

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