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Digital Signal Processing – Multiple Choice Questions (MCQs)

61. Decimation-in-time (DIT) FFT algorithm computes DFT by breaking it into smaller DFTs based on the ________ indices.
- A. Even and odd
- B. First and last
- C. Positive and negative
- D. Real and imaginary
62. Decimation-in-frequency (DIF) FFT algorithm computes DFT by breaking it into smaller DFTs based on the ________ indices.
- A. Even and odd
- B. First and last
- C. Positive and negative
- D. Real and imaginary
63. Floating point arithmetic in DSP can lead to:
- A. Quantization error
- B. Rounding error
- C. Truncation error
- D. All of the above
64. Limit cycles in IIR filters are caused by:
- A. Quantization
- B. Non-linear phase
- C. Finite precision arithmetic
- D. External noise
65. Overflow in fixed-point arithmetic occurs when the result of an operation exceeds the maximum representable value and can lead to:
- A. Limit cycles
- B. Noise
- C. Distortion
- D. Increased accuracy
66. The transfer function of a digital filter can be obtained from its difference equation by using the:
- A. Fourier Transform
- B. Laplace Transform
- C. Z-Transform
- D. Hilbert Transform
67. A filter is called "stable" if its impulse response is:
- A. Finite
- B. Infinite
- C. Absolutely summable
- D. Bounded
68. The mapping from s-plane to z-plane using impulse invariance method is:
- A. Linear
- B. Non-linear
- C. Logarithmic
- D. Exponential
69. The frequency sampling method is used for designing:
- A. IIR filters
- B. FIR filters
- C. Analog filters
- D. Adaptive filters
70. Which filter design method typically results in ripples in both the passband and stopband?
- A. Butterworth
- B. Chebyshev Type I
- C. Chebyshev Type II
- D. Elliptic (Cauer) filter
71. The group delay of an FIR filter with linear phase is:
- A. Constant
- B. Linear
- C. Zero
- D. Dependent on frequency
72. The process of changing a continuous-time signal to a discrete-time signal without changing its amplitude is called:
- A. Sampling
- B. Quantization
- C. Discretization
- D. Encoding

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Digital Signal Processing – Multiple Choice Questions (MCQs)

61. Decimation-in-time (DIT) FFT algorithm computes DFT by breaking it into smaller DFTs based on the ________ indices.

62. Decimation-in-frequency (DIF) FFT algorithm computes DFT by breaking it into smaller DFTs based on the ________ indices.

63. Floating point arithmetic in DSP can lead to:

64. Limit cycles in IIR filters are caused by:

65. Overflow in fixed-point arithmetic occurs when the result of an operation exceeds the maximum representable value and can lead to:

66. The transfer function of a digital filter can be obtained from its difference equation by using the:

67. A filter is called "stable" if its impulse response is:

68. The mapping from s-plane to z-plane using impulse invariance method is:

69. The frequency sampling method is used for designing:

70. Which filter design method typically results in ripples in both the passband and stopband?

71. The group delay of an FIR filter with linear phase is:

72. The process of changing a continuous-time signal to a discrete-time signal without changing its amplitude is called:

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