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Basic Digital Signal Processing MCQ

1. Each persons digital shadow is ____.

A numb sensation in the wrists and hands

The digital information generated about a person by organizations

May increase the likelihood of violence in the real world, but to date the studies are not conclusive

Adjusting the angle of a keyboard for comfort

Answer

Correct Answer: The digital information generated about a person by organizations

Note: This Question is unanswered, help us to find answer for this one

2. In the accompanying figure, the text ?click to add title? is the title ____.

Cursor

Placeholder point

Pointer

Insertion point

Answer

Correct Answer: Placeholder point

Note: This Question is unanswered, help us to find answer for this one

3. A(n) ____ signal is designed to represent computer data in a discrete high (on) or low (off) state.

Digial

WiMAX

Standard

Libel

Answer

Correct Answer: Digial

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4. A digital signal composed of a pulse of positive voltage represents a(n) ____.

Wavelength

Throughput

Answer

Correct Answer: 1

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5. The aliasing problem can be better handled by the__________.

Quardature Mirror Filter (QMF)

Brickwall Filter

Notch Filter

Digital Resonator

Answer

Correct Answer: Quardature Mirror Filter (QMF)

Note: This Question is unanswered, help us to find answer for this one

6. The Kaiser window design is used for ____________.

butterworth filters

Chebyshev filters

Elliptic filters

F.I.R. filters

Answer

Correct Answer: F.I.R. filters

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7. Anti-aliasing filter is basically a________.

high pass filter

low pass filter

band pass filter

band stop filter

Answer

Correct Answer: low pass filter

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8. In a Butterworth low pass filter, we get a maximally flat response of ___________.

Pass Band

Stop Band

Transition Band

High Pass Band

Answer

Correct Answer: Pass Band

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9. The condition of periodicity for a continuous time signal can be defined mathematically as _______. (Note: Here "To" is the fundamental period.)

x ( t ) = x ( t + 2To )

x ( t ) = x ( t + To/2 )

x ( t ) = x ( t + 4To )

x ( t ) = x ( t + To )

Answer

Correct Answer: x ( t ) = x ( t + To )

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10. The Z-Transform is used to analyze ____________.

continuous time signals

discrete time signals

random signals

noise signals

Answer

Correct Answer: discrete time signals

Note: This Question is unanswered, help us to find answer for this one

11. Which of the following is a time invariant system?

y ( n ) = x ( n ) + n x ( n - 1 )

y ( n ) = y ( n - 4 ) + x (n - 4)

y ( n ) = x ( 2 n )

y ( n ) = x (- n )

Answer

Correct Answer: y ( n ) = x ( 2 n )

Note: This Question is unanswered, help us to find answer for this one

12. A discrete time signal can be best analyzed by____________.

a fourier transform

a laplace transform

a Z- Transform

none of the above

Answer

Correct Answer: a Z- Transform

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13.
The sampling theorem holds true for the following condition________. (Note: Here 'fs' is the sampling frequency, and 'w' is the maximum frequency of the continuous time signal x (t)).

fs < 2 ω

fs > 2 ω

fs < ω / 2

fs > ω / 2

Answer

Correct Answer: fs > 2 ω

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14. The ALU of the ADSP 21XX family has two input ports named __________.

A and B

D and E

X and Y

H and L

Answer

Correct Answer: X and Y

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15. The signal cos(0.01πn) is_________.

non-periodic

periodic

an analog signal

None of the above

Answer

Correct Answer: periodic

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16. In Multirate Digital Signal Processing, the sampling rate of signals __________.

is increased

is decreased

is either increased or decreased

remains constant

Answer

Correct Answer: is either increased or decreased

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17. The term "filter" is used to describe a ___________.

linear time variant system

causal system

non-causal system

linear time invariant system

Answer

Correct Answer: linear time invariant system

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18. Which of the following systems is unstable?

y ( n ) = cos [ x ( n ) ]

y ( n ) = x ( - n )

y ( n ) = x ( 2 n )

None of the above

Answer

Correct Answer: None of the above

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19. The Flanging effect is a ____________.

light effect

vibration effect

sound effect

microwave signal effect

Answer

Correct Answer: sound effect

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20. The non-parametric methods for power spectrum estimation suffer from________.

phase distortion

spectrum leakage effects

amplitude distortion

None of the above

Answer

Correct Answer: spectrum leakage effects

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21. The circular frequency shift property is also known as __________.

the quadrature modulation theorem

the frequency modulation theorem

the shift modulation theorem

the circular modulation theorem

Answer

Correct Answer: the quadrature modulation theorem

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22. For the signal x ( t ) = 3cos600πt + 2cos1800πt , the folding frequency is __________.

600 Hz

1800 Hz

900 Hz

500 Hz

Answer

Correct Answer: 500 Hz

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23. In a Butterworth approximation for bilinear transformation, we have,

Ω= 2 / Ts tan ωc/ 4

Ω= 1 / Ts tan ωc / 2

Ω= 2 / Ts tan ωc / 2

Ω = 1 / Ts tan ωc / 3

Answer

Correct Answer: Ω= 2 / Ts tan ωc / 2

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24. Power signals are the signals having ________.

infinite non zero power

infinite zero power

finite non zero power

finite zero power

Answer

Correct Answer: finite non zero power

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25. The ADSP-21XX family supports __________.

a 32-bit instruction word

an 8-bit instruction word

a 16-bit instruction word

a 24-bit instruction word

Answer

Correct Answer: a 24-bit instruction word

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26. Digital Transmultiplexers are devices for converting ___________.

analog to digital signals

digital to analog signal

TDM to FDM

FDM to CDMA

Answer

Correct Answer: TDM to FDM

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27. The frequency warping effect occurs because of___________.

linear mapping

frequency expansion

amplitude attenuation

non-linear mapping

Answer

Correct Answer: non-linear mapping

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28. The MUSIC ( Multiple Signal Classification ) method is used for ____________.

estimation of power spectrum

estimation of spectral leakage effects

estimation of amplitude distortion

estimation of noise frequency

Answer

Correct Answer: estimation of noise frequency

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29. The parametric methods for Power Spectrum Estimation provide __________.

better phase resolution

better amplitude resolution

better frequency resolution

better leakage effects

Answer

Correct Answer: better frequency resolution

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30. The finite impulse response ( F.I.R ) filters are also called_________.

recursive filters

feedback filters

non-recursive filters

notch filters

Answer

Correct Answer: non-recursive filters

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31. The Harvard Architecture referred to the computer architectures that used _____________.

the same data storage for instructions and data

separate data storages for instructions and data

no storage for instructions and data

storage for instructions only

Answer

Correct Answer: separate data storages for instructions and data

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32. The ADSP-2100A has ____________.

no on-chip memory

on-chip memory

attached memory

both on-chip and attached memories

Answer

Correct Answer: no on-chip memory

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33. A continuous time signal is also known as a/an_______.

analog signal

digital signal

even signal

odd signal

Answer

Correct Answer: analog signal

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34. The type-1 chebyshev filter contains __________.

all zeros

all poles

zeros as well as poles

No poles and zeros

Answer

Correct Answer: all poles

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35. Which of the following is a non-causal system?

y ( n ) = x ( n ) + x ( n - 2 )

y ( n ) = e x (n)

y ( n ) = cos x ( n )

y ( n ) = x ( n ) + n x ( n - 1 )

Answer

Correct Answer: y ( n ) = cos x ( n )

Note: This Question is unanswered, help us to find answer for this one

36. Interfacing of digital systems with different sampling rates can be done efficiently by __________.

reduction of the sampling rate

interpolation of the sampling rate

both reduction and interpolation of the sampling rate

keeping the sampling rate constant

Answer

Correct Answer: both reduction and interpolation of the sampling rate

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37. Signals that are statistically stationary can be better estimated with _________.

Short data record

Long data record

Average data record

Answer

Correct Answer: Long data record

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38. The fundamental period of signal 10sin(12πt) + 4sin(18πt) is______.

2/3 Sec

1/2 Sec

1/3 Sec

1/4 Sec

Answer

Correct Answer: 1/3 Sec

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39. Quantization of a signal_____________.

reduces bandwidth requirement

increases bandwidth requirement

does not have any effect on bandwidth

Answer

Correct Answer: reduces bandwidth requirement

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40. MAC is used for ___________.

high speed addition

high speed multiplication

high speed division

high speed subtraction

Answer

Correct Answer: high speed multiplication

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41. Continuous time signals have_____________.

periodic spectra

discrete spectra

aperiodic spectra

continuous spectra

Answer

Correct Answer: aperiodic spectra

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42. Digital F.I.R. filters are so designed that they have linear phase characteristics in the _____________.

stop band

pass band

low pass band

high pass band

Answer

Correct Answer: pass band

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43. Which one of the following is not a register associated with the Program Sequencer?

Arithmetic Status Register (ASTAT)

Stack Status Register (SSTAT)

Mode Status Register (MSTAT)

System Register

Answer

Correct Answer: System Register

Note: This Question is unanswered, help us to find answer for this one

44. A continuous time signal is said to be symmetrical or even if it satisfies the condition, _________.

x ( t ) = x ( t/2 )

x ( t ) = x (√t )

x ( t ) = x ( 2t )

x ( t ) = x ( -t )

Answer

Correct Answer: x ( t ) = x ( -t )

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45. Environmental parameters like temperature, humidity etc. change the performance of __________.

analog filters only

digital Filters only

Both analog and digital filters

Neither analog nor digital filters

Answer

Correct Answer: analog filters only

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46. Sampling rate conversion by the rational number ( I / D = 1023 / 511 ) needs a polyphase filter with _________.

511 subfilters

500 subfilters

1000 subfilters

1023 subfilters

Answer

Correct Answer: 1023 subfilters

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47. In order to design digital filter, an important condition is that, the response of filter should ___________.

causal

non-causal

time-variant

time-invariant

Answer

Correct Answer: causal

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48. The Discrete Fourier Transform ( DFT ) of unit impulse function is__________.

Zero

Infinity

Answer

Correct Answer: 1

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49. A non-periodic signal has a period ( T ) of _______.

T = ∞

T = 0

T = 1

T = 2

Answer

Correct Answer: T = ∞
T = 0

Note: This question has more than 1 correct answers

Note: This Question is unanswered, help us to find answer for this one

50. In DFT, a circularly folded sequence is denoted by_________.

x (( n ))

x (( n/2 ))

x (( 2n ))

x (( -n ))

Answer

Correct Answer: x (( -n ))

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51. If a Z-Transform is evaluated on the unit circle at evenly spaced points only, it becomes __________.

FFT

DTFT

DFT

Answer

Correct Answer: DFT

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52. The periodogram is _________.

not a consistent estimate of the true power density spectrum

a consistent estimate of the true power density spectrum

not a consistent estimate of the true energy density spectrum

a consistent estimate of the true energy density spectrum

Answer

Correct Answer: not a consistent estimate of the true power density spectrum

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Basic Digital Signal Processing MCQ

1. Each persons digital shadow is ____.

2. In the accompanying figure, the text ?click to add title? is the title ____.

3. A(n) ____ signal is designed to represent computer data in a discrete high (on) or low (off) state.

4. A digital signal composed of a pulse of positive voltage represents a(n) ____.

5. The aliasing problem can be better handled by the__________.

6. The Kaiser window design is used for ____________.

7. Anti-aliasing filter is basically a________.

8. In a Butterworth low pass filter, we get a maximally flat response of ___________.

9. The condition of periodicity for a continuous time signal can be defined mathematically as _______. (Note: Here "To" is the fundamental period.)

10. The Z-Transform is used to analyze ____________.

11. Which of the following is a time invariant system?

12. A discrete time signal can be best analyzed by____________.

13. The sampling theorem holds true for the following condition________. (Note: Here 'fs' is the sampling frequency, and 'w' is the maximum frequency of the continuous time signal x (t)).

14. The ALU of the ADSP 21XX family has two input ports named __________.

15. The signal cos(0.01πn) is_________.

16. In Multirate Digital Signal Processing, the sampling rate of signals __________.

17. The term "filter" is used to describe a ___________.

18. Which of the following systems is unstable?

19. The Flanging effect is a ____________.

20. The non-parametric methods for power spectrum estimation suffer from________.

21. The circular frequency shift property is also known as __________.

22. For the signal x ( t ) = 3cos600πt + 2cos1800πt , the folding frequency is __________.

23. In a Butterworth approximation for bilinear transformation, we have,

24. Power signals are the signals having ________.

25. The ADSP-21XX family supports __________.

26. Digital Transmultiplexers are devices for converting ___________.

27. The frequency warping effect occurs because of___________.

28. The MUSIC ( Multiple Signal Classification ) method is used for ____________.

29. The parametric methods for Power Spectrum Estimation provide __________.

30. The finite impulse response ( F.I.R ) filters are also called_________.

31. The Harvard Architecture referred to the computer architectures that used _____________.

32. The ADSP-2100A has ____________.

33. A continuous time signal is also known as a/an_______.

34. The type-1 chebyshev filter contains __________.

35. Which of the following is a non-causal system?

36. Interfacing of digital systems with different sampling rates can be done efficiently by __________.

37. Signals that are statistically stationary can be better estimated with _________.

38. The fundamental period of signal 10sin(12πt) + 4sin(18πt) is______.

39. Quantization of a signal_____________.

40. MAC is used for ___________.

41. Continuous time signals have_____________.

42. Digital F.I.R. filters are so designed that they have linear phase characteristics in the _____________.

43. Which one of the following is not a register associated with the Program Sequencer?

44. A continuous time signal is said to be symmetrical or even if it satisfies the condition, _________.

45. Environmental parameters like temperature, humidity etc. change the performance of __________.

46. Sampling rate conversion by the rational number ( I / D = 1023 / 511 ) needs a polyphase filter with _________.

47. In order to design digital filter, an important condition is that, the response of filter should ___________.

48. The Discrete Fourier Transform ( DFT ) of unit impulse function is__________.

49. A non-periodic signal has a period ( T ) of _______.

50. In DFT, a circularly folded sequence is denoted by_________.

51. If a Z-Transform is evaluated on the unit circle at evenly spaced points only, it becomes __________.

52. The periodogram is _________.

13.
The sampling theorem holds true for the following condition________. (Note: Here 'fs' is the sampling frequency, and 'w' is the maximum frequency of the continuous time signal x (t)).