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Digital Signal Processing Question & Answers

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This article lists 100+ Digital Signal Processing MCQs for engineering students. All the Digital Signal Processing Questions & Answers given below includes solution and link wherever possible to the relevant topic.

Signal conveys information using gesture, action, and sound. The signal can be classified into two types one is analog and another one is a digital signal. Most of the signals are analog in nature means the signal is continuous with respect to time, to convert an analog signal to a digital signal we can use sampling and quantization.

Analog signal first converts into the discrete signal using sampling and quantization n which the signal is sampled at a discrete interval of time. Once the discrete signal is obtained then the signal is converted into a digital signal. Signal processing is performed to analyze, modify, and synthesize the signal.

1). The analog signals are categorized into ________
HintThe analog signals are categorized into two types they are continuous and discrete-time signal
2). If discrete-time signal passes through an analog to digital converter we get ______
HintIf the discrete-time signal passes through an analog to digital converter we get a binary sequence
3). The technique where processing is done on an analog signal is nothing but ______
HintThe technique where processing is done on an analog signal is nothing but analog signal processing
4). The most convenient and accurate signal processing technique is _____
HintThe most convenient and accurate signal processing technique is digital signal processing
5). The advantages of digital signal processing are _____
HintThe digital signal processing is flexible in operation, low cost and it is a stable system
6). The impulse response of FIR filter is ______
HintThe impulse response of FIR filter is finite
7). ______ are the major applications of FIR filter
HintData transmission, speech processing, correlation processing, and interpolation, etc are the major applications of FIR filter
8). The non-recursive FIR filters are always ______
HintThe non-recursive FIR filters are always stable
9). The advantages of FIR filters are _________
HintThe FIR filters are stable, can be realized in both recursive and non-recursive
10). How many types of signals are there?
HintThere are two types of signals are there they are analog and digital
11). Analog signals converts into digital signal using _______
HintAnalog signals converts into a digital signal using sampling and quantization
12). The signal processing is performed to ____________ the signal
HintThe signal processing is performed to analyze, modify, and synthesize the signal
13). How many types of signal processing are there?
HintThere are three types of signal processing are there they are analog signal processing, digital signal processing, and mixed-signal processing
14). The digital signal processing can be used in _______
HintDigital signal processing can be used in speech and audio processing, image and video processing, military and space applications, etc
15). The disadvantages of FIR filter are _________
HintThe disadvantages of FIR filter are they are complex and requires more filter coefficient
16). The number of complex addition in the direct computation of DFT is equal to _____
HintThe number of complex addition in the direct computation of DFT is equal to N(N-1)
17). The formula for percentage saving of addition in FFT is __________
HintThe formula for percentage saving of addition in FFT is 100-(number of addition in FFT/ number of addition in DFT)*100
18). The formula for percentage saving of multiplication in FFT is __________
HintThe formula for percentage saving of multiplication in FFT is 100-(number of multiplication in FFT/ number of multiplication in DFT)*100
19). ________ is the disadvantage of digital signal processing
HintSpeed of operation is limited in digital signal processing
20). If the processing is on a digital signal then the signal processing is called as _________
HintIf the processing is on a digital signal then the signal processing is called digital signal processing
21). The zero state response also called as ______ response
HintThe zero state response also called a forced response
22). The scaling operation also called as __________
HintThe scaling operation also called a downsampling
23). _____ parameters are required to calculate correlation between X(n) and Y(n) signals?
HintNoise signal, time delay, and attenuation factor parameters are required to calculate the correlation between X(n) and Y(n) signals
24). The zero input response also called as ______ response
HintThe zero input response also called a free or natural response
25). The function of the autocorrelation is ______
HintThe function of the autocorrelation is even

Digital Signal Processing MCQs for Interviews

26). The difference between quantized and unquantized is called quantization _______
HintThe difference between quantized and unquantized is called quantization error
27). Depending upon the number of independent variables the signals are categorized into ________
HintDepending upon the number of independent variables the signals are categorized into three types they are 1-D, 2-D, and M-D signals
28). __________ are the examples of random signals
HintEEG signal, ECG signal, speech signal are examples of random signals
29). The signals are categorized into ________ based on repetition nature
HintThe signals are categorized into two types based on repetition nature they are periodic and non-periodic signals
30). The signals are categorized into ________ based on reflection
HintThe signals are categorized into two types based on reflection they are even signals and odd signals
31). _________ are the main elements of digital signal processing system
HintQuantizer, sampler, digital signal processor, and decoder are the main elements of the digital signal processing system
32). The speech signals are _______
HintThe speech signals are one dimensional
33). The kinds of sounds are of ___________
HintThe kinds of sounds are of two types they are voiced and unvoiced signals
34). _________ is an application of speech coding
HintMilitary communication is an application of speech coding
35). ______ are the parameters of speech
HintPitch, loudness, and quality are the parameters of speech
36). ____________ is an application of speech recognition
HintInformation retrieval systems is an application of speech recognition
37). __________ are the common methods of speech analysis
HintHarmonorphic filtering, linear prediction, and short-time Fourier analysis are the common methods of speech analysis
38). The parameters of speech coding are ________
HintThe parameters of speech coding are bit rate, quality, delay, and complexity
39). _____________ is a type of waveform coding
HintFrequency domain coding is a type of waveform coding
40). __________ is a type of narrow-band coding
HintPitch excited coder is a type of narrow-band coding
41). How many types of redundancies are there?
HintThere are three types of redundancies are there they are spatial, temporal, and spectral redundancies
42). _________ are the common techniques based on the redundancy detection method
HintTransformation, direct data compression, parametric extraction methods are the common techniques based on the redundancy detection method
43). The discrete-time signals are categorized into __________
HintThe discrete-time signals are categorized into three types they are energy and power signals, periodic and non-periodic signals, symmetric and asymmetric signals
44). There are _________ types of infinite length sequences are there
HintThere are three types of infinite length sequences are there they are right-sided, anti causal, and causal, left-sided sequences
45). The discrete-time systems are categorized into ________
HintThe discrete-time systems are categorized into six types they are static & dynamic, time-variant & time-invariant, causal & non-causal, stable & unstable, linear & non-linear, FIR & IIR filters
46). What are the limitations of digital signal processing?
HintBandwidth restrictions, finite word length problems, speed limitations, are the limitations of digital signal processing
47). The signal ___________ are the uses of filters
HintThe signal separation and signal restoration are the uses of filters
48). How many types of digital filters are there?
HintThere are two types of digital filters are there they are FIR and IIR filters
49). _____ is a 16-bit fixed-point arithmetic DSP processor
HintTMS320C1X is a 16-bit fixed-point arithmetic DSP processor
50). _____ is a 32-bit fixed-point arithmetic DSP processor
HintTMS320C3X is a 32-bit fixed-point arithmetic DSP processor

Digital Signal Processing MCQs for Students

51). The noise power spectral density is equal to _________
HintThe noise power spectral density is equal to total power/bandwidth
52). _________ are the applications of multi-rate digital signal processing
HintCompact disc, digital audio, American and European television, etc are the applications of multi-rate digital signal processing
53). The advantages of the multi-rate digital signal processing are ___________
HintThe advantages of the multi-rate digital signal processing are accuracy is more and the sampling rate conversion is high
54). Which system requires infinite memory?
HintIIR filters require infinite memory
55). The number of computations is _________ in the FIR filter
HintThe number of computations is more in the FIR filter compare to IIR filters
56). The _________ filters don’t use feedbackAdd description here!
HintThe FIR filters don’t use feedback
57). Which filter requires high-performance ADC, DSP, and DAC?
HintAnalog filters requires high performance ADC, DSP, and DAC
58). The gain of the maximum pass band is ____________
HintThe gain of the maximum passband is 0.086dB
59). The gain of the ideal pass band is ____________
HintThe gain of the ideal pass band is 0dB
Read more about Band Pass Filters
60). The gain of the maximum stopband is ____________
HintThe gain of the maximum stopband is -60dB
61). In which filter the ripples are in the passband and stop band?
HintIn elliptical filters the ripples are in the passband and stop band
62). _______ are the commonly used analog filters
HintButterworth filters, Chebyshev filters, and elliptical filters are the commonly used analog filters
63). Which technique is used to design an IIR filter?
HintImpulse invariant mImpulse invariant method, Bilinear transformation method, and Matched Z-transform method techniques are used to design IIR filterethod, Bilinear transformation method, and Matched Z-transform method techniques are used to design IIR filter
64). Which signal is non-periodic?
HintEnergy signal is non-periodic signal
65). The Z-transform of δ[n] is ________
HintThe Z-transform of δ[n] is one
66). The Z-transform of U[n] is _________
HintThe Z-transform of U[n] is Z/Z-1
67). The time domain of linearity is expressed as __________
HintThe time-domain of linearity is expressed as af(t)+bg(t)
68). The S-domain of differentiation is expressed as _______
HintThe S-domain of differentiation is expressed as sF(S)-f(0)
69). The time domain of frequency differentiation is expressed as ______
HintThe time-domain of frequency differentiation is expressed as tf(t)
70). The S-domain of linearity is expressed as ______
HintThe S-domain of linearity is expressed as aF(S)+bG(S)
71). The S-domain of frequency shifting is expressed as ______
HintThe S-domain of frequency shifting is expressed as F(s-a)
72). The S-domain of integration is expressed as ______
HintThe S-domain of integration is expressed as 1/s F(s)
73). The time domain of frequency integration is expressed as ______
HintThe time-domain of frequency integration is expressed as f(t)/t
74). The time domain of time scaling is expressed as ______
HintThe time domain of time scaling is expressed as f(at)
75). The time domain of time shifting is expressed as ______
HintThe time-domain of time-shifting is expressed as f(t-a)u(t-a)

Digital Signal Processing MCQs for Exams

76). The S-domain of convolution is expressed as ______
HintThe S-domain of convolution is expressed as F(s).G(s)
77). The time domain of the cross-correlation is given as _____
HintThe time-domain of the cross-correlation is given as f(t)*g(t)
78). The bit size of DSP uniprocessor based TMS32010 is _______
HintThe bit size of DSP uniprocessor based TMS32010 is 16-bit integer
79). The clock speed of DSP processor TMS32010 is _______
HintThe clock speed of DSP processor TMS32010 is 20MHZ
80). The instruction throughput of DSP processor TMS32010 is _______
HintThe instruction throughput of DSP processor TMS32010 is 5MIPS
81). The MAC execution of DSP processor TMS32010 is _______
HintThe MAC execution of DSP processor TMS32010 is 400ns
82). ____________ are the applications of beamforming
HintRadar/sonar, navigation, signals intelligence, etc are the applications of beamforming
83). The frequency of HDTV signal for FIR filtering is ______
HintThe frequency of HDTV signal for FIR filtering is 144MHz
84). The frequency of TV signal for FIR filtering is ______
HintThe frequency of TV signal for FIR filtering is 27MHz
85). The frequency of video phone for FIR filtering is ______
HintThe frequency of video phone for FIR filtering is 6.75MHz
86). Which one is harvard architecture?
HintThe architecture of the digital signal processor is Harvard
Read more about Harvard Architecture
87). The F(ω) form of δ(t) is _______
HintThe F(ω) form of δ(t) is one
88). The F(f) form of signal Arect(t/T) is _______
HintThe F(f) form of signal Arect(t/T) is ATsinc(fT)
89). The F(ω) form of signal Arect(t/T) is _________
HintThe F(ω) form of signal Arect(t/T) is ATsinc(ωT/2)
90). The F(f) form of signal sinc(t) is ______
HintThe F(f) form of signal sinc(t) is Rect.(t)
91). The ROC of signal u(t) is ________
HintThe ROC of signal u(t) is Re[s]>0
92). For steady-state analysis _______ transform is used
HintFor steady-state analysis Fourier transform is used
93). The bit size of TM320C30 DSP processor is _______
HintThe bit size of the TM320C30 DSP processor is 32-bit integer
94). The clock speed of DSP processor TMS320C30 is _______
HintThe clock speed of DSP processor TMS320C30 is 33MHZ
95). The instruction throughput of DSP processor TMS320C30 is _______
HintThe instruction throughput of DSP processor TMS320C30 is 17MIPS
96). The MAC execution of DSP processor TMS320C30 is _______
HintThe MAC execution of DSP processor TMS320C30 is 60ns
97). ________ are the applications of echo cancellation
HintSpeakerphones are the applications of echo cancellation
98). The frequency of music for FIR filtering is _____
HintThe frequency of music for FIR filtering is 48KHz
99). The F(ω) form of signal sinc(t) is ___________
HintThe F(ω) form of signal sinc(t) is Rect.(ω/2π)
100). The F(ω) form of constant A is ___________
HintThe F(ω) form of constant A is 2πAδ(ω)

Digital Signal Processing MCQs

101). For transient signal analysis ___________ transform is used
HintFor transient signal analysis Laplace transform is used
102). The input of the discrete-time Fourier transform is ___________
HintThe input of the discrete-time Fourier transform is a discrete and periodic signal
103). The input of the discrete Fourier transform is ___________
HintThe input of the discrete Fourier transform is discrete, and periodic extension of a finite length or periodic signal
104). In Fourier transform the range of ω is ________
HintIn Fourier transform the range of ω is from -π to +π or 0 to 2π
105). The F(f) form of signal sgn(t) is _______
HintThe F(f) form of signal sgn(t) is 1/jωf
106). The F(ω) form of signal sgn(t) is _______
HintThe F(ω) form of signal sgn(t) is 2/jω
107). The F(f) form of constant A is _______
HintThe F(f) form of constant A is Aδ(f)
108). The F(f) form of signal u(t) is ______
HintThe F(f) form of signal u(t) is 1/j2πf + 0.5 δ(f)
109). The range of ω in discrete Fourier transform is _____
HintThe range of ω in discrete Fourier transform is 0 to 2π
110). The Z transform of au(n) is ______
HintThe Z transform of au(n) is az/z-1
111). The spatial domain of scaling is ____
HintThe spatial domain of scaling is f(ax)
112). The spatial domain of the symmetry is ____
HintThe spatial domain of the symmetry is F(x)
113). The frequency-domain of symmetry is ____
HintThe frequency-domain of symmetry is F(-u)
114). The frequency domain of convolution is ____
HintThe frequency domain of convolution is F(u)G(u)
115). The F(ω) form of u(t) signal is __________
HintThe F(ω) form of u(t) signal is 1/jω + πδ(ω)
116). Which one is a mathematical tool?
HintBoth Fourier series and Fourier transforms are mathematical tools for representing the signal in the frequency domain
117). Which one is mainly used for periodic signals?
HintFourier series is mainly used for periodic signals
118). The conditions for existence of Fourier transform are ___________
HintThe conditions for the existence of Fourier transform are f(t) should be absolutely integrable, the function must have a finite number of minima and maxima, and a finite number of discontinuities
119). The signal can be a function of ___________
HintThe signal can be a function of time, distance, position, pressure, and temperature
120). Which one is mainly used for aperiodic signals?
HintFourier transform is mainly used for aperiodic signals
121). ______ is an example of modern conventional DSP
HintT1 TMS320C54X is an example of modern conventional DSP
122). ______ is an example of modern enhanced DSP
HintT1 TMS320C55X is an example of modern enhanced DSP
123). ______ is an example of multiple issue DSP
HintT1 TMS320C64X is an example of multiple issue DSP
124). Which one is a superscalar DSP?
HintLSI logic ZPS400 is a superscalar DSP
125). ________ systems cannot implement linear phase filtering
HintIIR systems cannot implement linear phase filtering

Digital Signal Processing MCQs for Quiz

126). In which filter the poles lie on the circle in the s-plane?
HintIn Butterworth filter the poles lie on the circle in the s-plane
127). In which filter the inductors are present?
HintIn passive RLC filters the inductors are present
128). ______ are the applications of analog filters
HintAudio equipment, sampling, and telephone systems, etc are the applications of analog filters
129). The digital systems are _________
HintThe digital systems are highly reliable, the physical size is small, and the accuracy of the system is high
130). _______ are the applications of digital filters
HintInstrumentation, artificial cochleas, speech synthesis, etc are the applications of digital filters
131). The frequency range of discrete active RC filters is from ______
HintThe frequency range of discrete active RC filters is from 10Hz to 1MHz
132). The frequency range of switched-capacitor filters is from ______
HintThe frequency range of switched-capacitor filters is from 10Hz to 5MHz
133). The frequency range of passive RLC filters is from ______
HintThe frequency range of passive RLC filters is from 0.1MHz to 0.1GHz
134). The frequency range of integrated RC filters is from ______
HintThe frequency range of integrated RC filters is from 0.1MHz to 15GHz
135). _____ are the examples of singularities
HintPoles, essential singularities, branch points, etc are examples of singularities
136). The frequency range of microwave filters is from ______
HintThe frequency range of microwave filters is from 0.5GHz to 500GHz
137). ______ are used in Butterworth filter
HintOnly capacitors are used in Butterworth filter
138). Which filter requires more hardware?
HintButterworth filters requires more hardware
139). Butterworth filters are used in _______
HintButterworth filters are used in communication and control systems, radar, audio processing applications, etc
140). The interface between the digital processor and an analog signal is _______
HintThe interface between the digital processor and an analog signal is analog to digital converter
141). The discrete-time Fourier transform is the representation of ______ time signals representation
HintThe discrete-time Fourier transform is the representation of aperiodic discrete-time signals representation
142). The fast Fourier transform used to calculate ______
HintThe fast Fourier transform used to calculate both DFT and IDFT
143). The Chebyshev filters have a _____________
HintThe Chebyshev filters have a flat stopband and equi ripple passband
144). The elliptical filters have ________________
HintThe elliptical filters have equi ripple passband and equi ripple stop bands
145). The function of one dimension signal is _______ variable
HintThe function of one dimension signal is the double independent variable
146). ____________ is the process of down sampling
HintDecimation is the process of down sampling
147). Discrete Fourier transform applied to ________ sequences
HintDiscrete Fourier transform applied to finite discrete sequences
148). Correlation is used for ____________
HintCorrelation is used for climatography and also used in portfolio management
149). What is the standard form of DPCM?
HintThe standard form of DPCM is Differential Pulse Code Modulation
150). What is the standard form of DM?
HintThe standard form of DM is Delta Modulation

Digital Signal Processing Important MCQs with Hints

151). In delta modulation, the quantizer is a _____ bit quantizer
HintIn delta modulation, the quantizer is a one-bit quantizer
Read more about Delta Modulation
152). _________ order predictor is used in delta modulation
HintFirst-order predictor is used in delta modulation
153). ____________ uses quadrature mirror filters
HintThe trans multiplexer and subband coding use quadrature mirror filters
154). The function f(t)=f(-t) is a ________ function
HintThe function f(t)=f(-t) is a even function
155). To convert digital filter specifications to analog filter specifications in bilinear transformation design method for IIR filter will use _________
HintTo convert digital filter specifications to analog filter specifications in bilinear transformation design method for IIR filter will use transformation with frequency wrapping
156). Once the analog filter specifications are obtained in bilinear transformation design for IIR filter design then the analog filter specifications transformed into ________
HintOnce the analog filter specifications are obtained in bilinear transformation design for IIR filter design then the analog filter specifications transformed into analog filter transfer function
157). The function f(-t)=-f(t) is a ___________ symmetry
HintThe function f(-t)=-f(t) is a odd symmetry
158). In bilinear transformation design method for IIR filter, an analog filter specifications transformed into analog filter transfer function by using ________
HintIn bilinear transformation design method for IIR filter, an analog filter specifications transformed into analog filter transfer function by using transformation by low pass prototype filter
159). In bilinear transformation design method for IIR filter, an analog filter transfer function converted into digital filter transfer function by using ________
HintIn bilinear transformation design method for IIR filter, an analog filter transfer function converted into digital filter transfer function by using the bilinear transformation
160). The advantage of using floating-point processors is to _______
HintThe advantage of using floating-point processors is it avoids overflow, roundoff error, truncation error, and coefficient quantization error
161). The function f(t-T/2)=-f(t) is a ______ symmetry
HintThe function f(t-T/2)=-f(t) is a half wave symmetry
162). The floating-point digital signal processor performs _________ signal processing operations
HintThe floating-point digital signal processor performs digital signal processing operations
163). The TMS320C3X floating-point DSP processor includes ______
HintThe TMS320C3X floating-point DSP processor includes integer, floating-point multiplier, and ALU
164). The TMS320C3X supports __________ floating-point formats
HintThe TMS320C3X supports three types of floating-point formats they are 16-bit, 32-bit, and 40-bit floating-point formats
165). The TMS320C3X floating-point DSP processor supports 16-bit floating-point format has _______
HintThe TMS320C3X floating-point DSP processor supports 16-bit floating-point format has 4 exponent bits, 1 sign bit, and 11 mantissa bits
166). The TMS320C3X floating-point DSP processor supports 32-bit floating-point format has _______
HintThe TMS320C3X floating-point DSP processor supports 32-bit floating-point format has 8 exponent bits, 1 sign bit, and 23 mantissa bits
167). The TMS320C3X floating-point DSP processor supports 40-bit floating-point format has _______
HintThe TMS320C3X floating-point DSP processor supports 40-bit floating-point format has 8 exponent bits, 1 sign bit, and 31 mantissa bits
168). TMS320C54 family processor supports _________
HintTMS320C54 family processor supports 16-bit data, and it is having on-chip program memory, as well as data memory
169). The TMS320C54X family processors, the on-chip program memory, and data memory includes _______
HintThe TMS320C54X family processors, the on chip-program memory, and data memory includes both RAM and ROM
170). The RAM and ROM in the TMS32C54X family processor used for _______
HintThe RAM and ROM in the TMS32C54X family processor used for program code, instructions, and data
171). The TMS32C54X family processor has _________
HintThe TMS32C54X family processor has 2 independent 40-bit accumulator
172). The TMS32C54X family processor has _________ shift units
HintThe TMS32C54X family processor has 40-bit shift units
173). The shift unit in the TMS32C54X processor performs __________
HintThe shift unit in the TMS32C54X processor performs both scaling and fractional arithmetic operations
174). The 8-bit exponent in single-precision floating point will range from _________
HintThe 8-bit exponent in single-precision floating-point will range from 0 to 255
175). The double-precision floating-point representation requires _______
HintThe double-precision floating-point representation requires 64-bit word
176). The design of general microprocessor and microcontroller is based on _________
HintThe design of the general microprocessor and microcontroller is based on von-Neumann architecture
177). __________ tells the CPU what to do
HintOpcode tells the CPU what to do
178). ___________ informs the CPU what data to operate on
HintOperand informs the CPU what data to operate on
179). The ___________ phase filters are used to prevent the input shape of the signals?
HintThe linear phase filters are used to prevent the input shape of the signals
180). If we apply DTFT to h(n) will get ______
HintIf we apply DTFT to h(n) will get H(ω)
181). IIR filter output y(n) depends on _______
HintIIR filter output y(n) depends on x(n), x(n-1), and y(n-1)
182). IIR filter offers a ______
HintIIR filter offers a smaller filter size, and linear phase is not easy to be obtained
183). The IIR filter design main objective is to determine the filter ______
HintThe IIR filter design main objective is to determine the filter denominator and numerator coefficients to satisfy the specifications of the filter
184). The IIR filters are ____
HintThe IIR filters are easy to design and not easy to implement
185). ______ are the DSP hardware units
HintMAC, address generator, and shifter are the DSP hardware units
186). The impulse response of a symmetric linear phase finite impulse response filter can be represented as _______
HintThe impulse response of symmetric linear-phase finite impulse response filter can be represented as h(n)=h(m-1-n)
187). What is the standard form of DIT?
HintThe standard form of DIT is Decimation in Time

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