Digital Signal Processing Quiz (2017-18)

21 Questions | Total Attempts: 181

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Digital Signal Processing Quiz    (2017-18) - Quiz


Questions and Answers
  • 1. 
    The DFT is preferred for1) Its ability to determine the frequency component of the signal2) Removal of noise3) Filter design4) Quantization of signal
    • A. 

      A. 1, 2 and 3 are correct

    • B. 

      B. 1 and 2 are correct

    • C. 

      C. 1 and 3 are correct

    • D. 

      D. All the four are correct

  • 2. 
    FFT may be used to calculate1) DFT2) IDFT3) Direct Z transform4) In direct Z transform
    • A. 

      1, 2 and 3 are correct

    • B. 

      1 and 2 are correct

    • C. 

      1 and 3 are correct

    • D. 

      All the four are correct

  • 3. 
     DIT algorithm divides the sequence into
    • A. 

      Positive and negative values

    • B. 

      Even and odd samples

    • C. 

      Upper higher and lower spectrum

    • D. 

      Small and large samples

  • 4. 
    The computational procedure for Decimation in frequency algorithm takes
    • A. 

      Log2 N stages

    • B. 

      2Log2 N stages

    • C. 

      Log2 N2 stages

    • D. 

      Log2 N/2 stages

  • 5. 
      The transformations are required for1) Analysis in time or frequency domain2) Quantization3) Easier operations4) Modulation
    • A. 

      1, 2 and 3 are correct

    • B. 

      1 and 2 are correct

    • C. 

      1 and 3 are correct

    • D. 

      All the four are correct

  • 6. 
    The IIR filter designing involves
    • A. 

      Designing of analog filter in analog domain and transforming into digital domain

    • B. 

      Designing of digital filter in analog domain and transforming into digital domain

    • C. 

      Designing of analog filter in digital domain and transforming into analog domain

    • D. 

      Designing of digital filter in digital domain and transforming into analog domain

  • 7. 
     DIT algorithm divides the sequence into 
    • A. 

      Positive and negative values

    • B. 

      Even and odd samples

    • C. 

      Upper higher and lower spectrum

    • D. 

      Small and large samples

  • 8. 
    The circular convolution of two sequences in time domain is equivalent  to
    • A. 

      Multiplication of DFTs of two sequences

    • B. 

      Summation of DFTs of two sequences

    • C. 

      Difference of DFTs of two sequences

    • D. 

      Square of multiplication of DFTs of two sequences

  • 9. 
    The overlap save method is used to calculate 
    • A. 

      The discrete convolution between a sampled signal and a finite impulse response (FIR) filter

    • B. 

      The discrete convolution between a sampled signal and an infinite impulse response (IIR) filter

    • C. 

      The discrete convolution between a very long signal and a finite impulse response (FIR) filter

    • D. 

      The discrete convolution between a very long signal and a infinite impulse response (IIR) filter

  • 10. 
    WN is called as 
  • 11. 
    The property that supports W88 =W80 is 
  • 12. 
    Output length of the linear convolution is given by 
  • 13. 
    We can Design Digital Filters using Wrapping Technique
    • A. 

      True

    • B. 

      False

  • 14. 
    Multiplication of two sequences in Fourier domain gives linear convolution output in time domain
    • A. 

      True

    • B. 

      False

  • 15. 
    Chebhsev and butterworth filters gives same order for the same specifications in filter design
    • A. 

      True

    • B. 

      False

  • 16. 
    64 point FFT contains 5 stages of computations
    • A. 

      True

    • B. 

      False

  • 17. 
    Linear convolution output can be obtained using/applying circular convolution method
    • A. 

      True

    • B. 

      False

  • 18. 
    Overlap save and overlap add methods requires same no of iteration blocks for computation for final output
    • A. 

      True

    • B. 

      False

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