AllInfoHub – MCQ Practice

Digital Signal Processing – Multiple Choice Questions (MCQs)

73. The spectrum of a sampled signal contains repetitions of the original analog signal's spectrum
- A. shifted by integer multiples of the:
- B. Sampling frequency
- C. Nyquist frequency
- D. Cut-off frequency
74. The unit of quantization noise power is typically:
- A. Watts
- B. dB
- C. dBm
- D. Watts per Hz
75. The number of quantization levels in a PCM system is determined by:
- A. Sampling rate
- B. Number of bits per sample
- C. Bandwidth
- D. Signal-to-noise ratio
76. The power line interference at 50 Hz or 60 Hz in a digital signal can be removed effectively by a:
- A. Low-pass filter
- B. High-pass filter
- C. Notch filter
- D. Band-pass filter
77. The transfer function of a first-order FIR filter can be represented as:
- A. H(z) = b₀ + b₁z⁻¹
- B. H(z) = b₀ / (1 + a₁z⁻¹)
- C. H(z) = z⁻¹
- D. H(z) = 1 / (1 - z⁻¹)
78. The filter coefficients in an FIR filter directly correspond to its:
- A. Poles
- B. Zeros
- C. Impulse response
- D. Frequency response
79. Which of the following is a major advantage of digital filters over analog filters?
- A. Higher reliability
- B. Reproducibility
- C. Flexibility
- D. All of the above
80. The process of scaling the frequency axis in digital filter design to compensate for the non-linear mapping of bilinear transformation is called:
- A. Aliasing
- B. Pre-warping
- C. Quantization
- D. Windowing
81. The property of DTFT that states X(e^jω) is periodic with period 2π is due to:
- A. Sampling
- B. Quantization
- C. Discrete nature of time
- D. Periodicity of sinusoids
82. The group delay of a filter is the negative of the derivative of its:
- A. Magnitude response
- B. Phase response
- C. Impulse response
- D. Frequency response
83. The transfer function of a digital resonator has poles close to the:
- A. Origin
- B. Unit circle
- C. Real axis
- D. Imaginary axis
84. A system that exhibits a uniform delay for all frequency components is said to have:
- A. Linear phase
- B. Non-linear phase
- C. Constant phase
- D. Zero phase

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Digital Signal Processing – Multiple Choice Questions (MCQs)

73. The spectrum of a sampled signal contains repetitions of the original analog signal's spectrum

74. The unit of quantization noise power is typically:

75. The number of quantization levels in a PCM system is determined by:

76. The power line interference at 50 Hz or 60 Hz in a digital signal can be removed effectively by a:

77. The transfer function of a first-order FIR filter can be represented as:

78. The filter coefficients in an FIR filter directly correspond to its:

79. Which of the following is a major advantage of digital filters over analog filters?

80. The process of scaling the frequency axis in digital filter design to compensate for the non-linear mapping of bilinear transformation is called:

81. The property of DTFT that states X(e^jω) is periodic with period 2π is due to:

82. The group delay of a filter is the negative of the derivative of its:

83. The transfer function of a digital resonator has poles close to the:

84. A system that exhibits a uniform delay for all frequency components is said to have:

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