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Digital Signal Processing Multiple Choice Questions | MCQs | Quiz

Digital Signal Processing Interview Questions and Answers
Pratice Digital Signal Processing questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   ↓ Discrete Time System ↓
•   Implementation
•   Difference Equations
•   Analysis
•   Discrete Time Signals
•   Discrete Time Systems
•   Correlation
•   A2D & D2A Converters
•   Signal Classification
•   Signal Processing
•   Z Transform
•   Z Transform Properties - 1
•   Z Transform Properties - 2
•   Rational Z Transform
•   Z Transform Inversion
•   One Sided Z Transform
•   Z Domain System Analysis
•   ↓ Time Signal Analysis ↓
•   Continuous Analysis
•   Discrete Analysis - 1
•   Discrete Analysis - 2
•   Fourier Transform Property
•   LTI System Characteristics
•   Frequency Selective Filters
•   Inverse Systems
•   Frequency Domain Sample
•   DFT Properties
•   DFT Signal Analysis
•   Algorithm Computation - 1
•   Algorithm Computation - 2
•   FFT Algorithm Applications
•   DFT Computation Filtering
•   Quantization Effects
•   Realization Structures
•   FIR System Structures - 1
•   FIR System Structures - 2
•   IIR System Structures
•   State Space System
•   Number Representation - 1
•   Number Representation - 2
•   DTS Processing
•   Quantization Error Analysis
•   IIR Filter Design
•   Butterworth Filters Design-1
•   Butterworth Filters Design-2
•   Chebyshev Filters - 1
•   Chebyshev Filters - 2
•   Backward Method
•   Bilinear Transformations
•   Filter Quantization
•   Digital Filters Effects
•   Digital Filters Design
•   FIR Filters Design
•   FIR Windows Design - 1
•   FIR Windows Design - 2
•   Frequency Sample Method
•   Ripple Filter Design - 1
•   Ripple Filter Design - 2
•   FIR Differentiator Design
•   Hilbert Transformers Design
•   FIR Design Comparison
•   Analog Filters Design
•   Derivatives Design Method
•   Impulse Filter Design
•   Matched Z Transformation
•   Analog Characteristics
•   ↓ Transformations ↓
•   Analog Domain Frequency
•   Digital Domain Frequency
•   PadeApproximation Method
•   Least Squares Design
•   FIR Least Squares Filters
•   IIR Frequency Domain Filter
•   Analog Filters Classification
•   Butterworth Filters
•   Frequency Transformations
•   Factor I Interpolation
•   Sampling Rate Conversion
•   Multirate Signal Processing
•   Factor D Decimation
•   A/D Converter Oversampling
•   Sample & Hold
•   Band Pass Signal Sampling
•   Bandpass Signal
•   Quantization & Coding
•   Digital-Analog Conversion

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Digital Signal Processing Questions and Answers – Design of Low Pass Butterworth Filters 1

Posted on October 27, 2015 by Manish

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Design of Low Pass Butterworth Filters-1”.

1. Which of the following is a frequency domain specification?
a) 0≥ 20 log|H(jΩ)|
b) 20 log|H(jΩ)| ≥ KP
c) 20 log|H(jΩ)| ≤ KS
d) All of the mentioned
View Answer

Answer: d
Explanation: We are required to design a low pass Butterworth filter to meet the following frequency domain specifications.
KP ≤ 20 log|H(jΩ)| ≤ 0
and 20 log|H(jΩ)| ≤ KS.

2. What is the value of gain at the pass band frequency, i.e., what is the value of KP?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q2
View Answer

Answer: b
Explanation: We know that the formula for gain isdigital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q2a

3. What is the value of gain at the stop band frequency, i.e., what is the value of KS?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q3
View Answer

Answer: a
Explanation: We know that the formula for gain is
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q3a

4. Which of the following equation is True?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q4d) None of the mentioned
View Answer

Answer: c
Explanation: We know that,
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q4a

5. Which of the following equation is True?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q5d) None of the mentioned
View Answer

Answer: b
Explanation: We know that,
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q5a

6. What is the order N of the low pass Butterworth filter in terms of KP and KS?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q6
View Answer

Answer: d
Explanation:
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q6a

7. What is the expression for cutoff frequency in terms of pass band gain?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q7d) None of the mentioned
View Answer

Answer: a
Explanation: We know that,
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q7a

8. What is the expression for cutoff frequency in terms of stop band gain?
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q8d) None of the mentioned
View Answer

Answer: c
Explanation: We know that,
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q8a

9. The cutoff frequency of the low pass Butterworth filter is the arithmetic mean of the two cutoff frequencies as found above.
a) True
b) False
View Answer

Answer: a
Explanation: The arithmetic mean of the two cutoff frequencies as found above is the final cutoff frequency of the low pass Butterworth filter.

10. What is the lowest order of the Butterworth filter with a pass band gain KP= -1 dB at ΩP= 4 rad/sec and stop band attenuation greater than or equal to 20dB at ΩS= 8 rad/sec?
a) 4
b) 5
c) 6
d) 3
View Answer

Answer: b
Explanation: We know that the equation for the order of the Butterworth filter is given as
digital-signal-processing-questions-answers-design-low-pass-butterworth-filters-1-q10
From the given question,
KP= -1 dB, ΩP= 4 rad/sec, KS= -20 dB and ΩS= 8 rad/sec
Upon substituting the values in the above equation, we get
N=4.289
Rounding off to the next largest integer, we get N=5.

Sanfoundry Global Education & Learning Series – Digital Signal Processing.

To practice all areas of Digital Signal Processing, here is complete set of 1000+ Multiple Choice Questions and Answers.

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