Digital Signal Processing Question & Answers June 5, 2021 By WatElectronics 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. There are three types of signal processing they are analog signal processing, digital signal processing, and mixed-signal processing. Digital signal processing is flexible in operation, low cost, and is a stable system. There are two types of signals are there they are analog and digital. The most convenient and accurate signal processing technique is digital signal processing. The signal processing is performed to analyze, modify, and synthesize the signal. Digital signal processing can be used in speech and audio processing, image and video processing, military and space applications, etc. The quantizer, sampler, digital signal processor, and decoder are the main elements of the digital signal processing system. 1). The analog signals are categorized into ________ One Two Three Four Hint 2). If discrete-time signal passes through an analog to digital converter we get ______ Binary sequence Decimal sequence Hexadecimal sequence None of the above Hint 3). The technique where processing is done on an analog signal is nothing but ______ Analog signal processing Digital signal processing Mixed-signal processing None of the above Hint 4). The most convenient and accurate signal processing technique is _____ Analog signal processing Digital signal processing Mixed-signal processing None of the above Hint 5). The advantages of digital signal processing are _____ Flexible in operation It is a stable system Low cost All of the above Hint 6). The impulse response of FIR filter is ______ Finite Zero One Infinite Hint 7). ______ are the major applications of FIR filter Data transmission Speech processing Correlation processing and interpolation All of the above Hint 8). The non-recursive FIR filters are always ______ Stable Unstable Hint 9). The advantages of FIR filters are _________ Stable Realized in recursive Realized in non-recursive All of the above Hint 10). How many types of signals are there? One Two Three Four Hint 11). Analog signals converts into digital signal using _______ Sampling Quantization Both a and b None of the above Hint 12). The signal processing is performed to ____________ the signal Analyze Modify Synthesize All of the above Hint 13). How many types of signal processing are there? One Two Three Four Hint 14). The digital signal processing can be used in _______ Speech and audio processing Image and video processing Military and space applications All of the above Hint 15). The disadvantages of FIR filter are _________ Complex Requires more filter coefficient Simple Both a and b Hint 16). The number of complex addition in the direct computation of DFT is equal to _____ N(N-1) N(N+1) N(N*1) N(1/N) Hint 17). The formula for percentage saving of addition in FFT is __________ 100-(number of addition in FFT/ number of addition in DFT)*100 100-(number of addition in DFT/ number of addition in FFT)*100 100-(number of addition in FFT/ number of addition in FFT)*100 None of the above Hint 18). The formula for percentage saving of multiplication in FFT is __________ 100-(number of multiplication in FFT/ number of multiplication in DFT)*100 100-(number of multiplication in DFT/ number of multiplication in FFT)*100 100-(number of multiplication in FFT/ number of multiplication in FFT)*100 None of the above Hint 19). ________ is the disadvantage of digital signal processing Flexible in operation Speed of operation is limited Speed of operation is unlimited None of the above Hint 20). If the processing is on a digital signal then the signal processing is called as _________ Analog Digital Mixed None of the above Hint 21). The zero state response also called as ______ response Free Forced Natural None of the above Hint 22). The scaling operation also called as __________ Up-sampling Down-sampling Both a and b None of the above Hint 23). _____ parameters are required to calculate correlation between X(n) and Y(n) signals? Noise signal Time delay Attenuation factor All of the above Hint 24). The zero input response also called as ______ response Free Natural Free or natural None of the above Hint 25). The function of the autocorrelation is ______ Even Odd Both a and b None of the above Hint Digital Signal Processing MCQs for Interviews 26). The difference between quantized and unquantized is called quantization _______ Error Coefficient Ratio None of the above Hint 27). Depending upon the number of independent variables the signals are categorized into ________ One Two Three Four Hint 28). __________ are the examples of random signals EEG signal ECG signal Speech signal All of the above Hint 29). The signals are categorized into ________ based on repetition nature One Two Three Four Hint 30). The signals are categorized into ________ based on reflection One Two Three Four Hint 31). _________ are the main elements of digital signal processing system Quantizer, Sampler Digital signal processor Decoder All of the above Hint 32). The speech signals are _______ One dimensional Two dimensional Three dimensional Multidimensional Hint 33). The kinds of sounds are of ___________ One Two Three Four Hint 34). _________ is an application of speech coding Military communication Voice alarms Information retrieval systems All of the above Hint 35). ______ are the parameters of speech Pitch Loudness Quality All of the above Hint 36). ____________ is an application of speech recognition Information retrieval systems Source coding Narrowband cellular radio None of the above Hint 37). __________ are the common methods of speech analysis Harmonorphic filtering Linear prediction Short-time Fourier analysis All of the above Hint 38). The parameters of speech coding are ________ Bitrate Quality, delay Complexity All of the above Hint 39). _____________ is a type of waveform coding Frequency domain coding Vector quantization Pitch excited coder None of the above Hint 40). __________ is a type of narrow-band coding Frequency domain coding Linear predictive coding Pitch excited coder None of the above Hint 41). How many types of redundancies are there? One Two Three Four Hint 42). _________ are the common techniques based on the redundancy detection method Transformation method Direct data compression method Parametric extraction method All of the above Hint 43). The discrete-time signals are categorized into __________ One Two Three Four Hint 44). There are _________ types of infinite length sequences are there One Two Three Four Hint 45). The discrete-time systems are categorized into ________ One Two Four Six Hint 46). What are the limitations of digital signal processing? Bandwidth restrictions Finite word length problems Speed limitations All of the above Hint 47). The signal ___________ are the uses of filters Signal separation Signal restoration Both a and b None of the above Hint 48). How many types of digital filters are there? One Two Four Six Hint 49). _____ is a 16-bit fixed-point arithmetic DSP processor TMS320C1X TMS320C3X TMS320C4X None of the above Hint 50). _____ is a 32-bit fixed-point arithmetic DSP processor TMS320C3X TMS320C5X TMS320C8X None of the above Hint Digital Signal Processing MCQs for Students 51). The noise power spectral density is equal to _________ Total power-Bandwidth Bandwidth/ Total power Total power/Bandwidth None of the above Hint 52). _________ are the applications of multi-rate digital signal processing Compact disc Digital audio American and European television All of the above Hint 53). The advantages of the multi-rate digital signal processing are ___________ Gives more accuracy Sampling rate conversion is high Both a and b None of the above Hint 54). Which system requires infinite memory? FIR filters IIR filters Both a and b None of the above Hint 55). The number of computations is _________ in the FIR filter More Less No computations None of the above Hint 56). The _________ filters don’t use feedback Add description here! IIR FIR Both a and None of the above Hint 57). Which filter requires high-performance ADC, DSP, and DAC? Analog filters Digital filters Both a and b None of the above Hint 58). The gain of the maximum pass band is ____________ 0.086dB 0.08dB 0.06dB None of the above Hint 59). The gain of the ideal pass band is ____________ 0.086dB 0.08dB 0dB None of the above Hint Read more about Band Pass Filters 60). The gain of the maximum stopband is ____________ 0.086dB b)c)d) -60dB 0dB None of the above Hint 61). In which filter the ripples are in the passband and stop band? Butterworth filters Chebyshev filters Elliptical filters None of the above Hint 62). _______ are the commonly used analog filters Butterworth filters Chebyshev filters Elliptical filters All of the above Hint 63). Which technique is used to design an IIR filter? Impulse invariant method Matched Z-transform method Bilinear transformation method All of the above Hint 64). Which signal is non-periodic? Power signal Energy signal Both a and b None of the above Hint 65). The Z-transform of δ[n] is ________ One Zero Finite Infinite Hint 66). The Z-transform of U[n] is _________ Z/Z-1 Z/Z+1 Z/Z-a Z/Z-b Hint 67). The time domain of linearity is expressed as __________ af(t)+bg(t) aF(S)+bG(S) tf(t) None of the above Hint 68). The S-domain of differentiation is expressed as _______ af(t)+bg(t) aF(S)+bG(S) sF(S)-f(0 None of the above Hint 69). The time domain of frequency differentiation is expressed as ______ f(t)/t f(t) tf(t) None of the above Hint 70). The S-domain of linearity is expressed as ______ af(t)+bg(t) aF(S)+bG(S) tf(t) sF(S)-f(0) Hint 71). The S-domain of frequency shifting is expressed as ______ af(t)+bg(t) aF(S)+bG(S) F(s-a) sF(S)-f(0) Hint 72). The S-domain of integration is expressed as ______ af(t)+bg(t) 1/s F(s) F(s-a) sF(S)-f(0) Hint 73). The time domain of frequency integration is expressed as ______ tf(t) f(t)/t F(s-a) sF(S)-f(0) Hint 74). The time domain of time scaling is expressed as ______ tf(t) f(t)/t f(at) sF(S)-f(0) Hint 75). The time domain of time shifting is expressed as ______ tf(t) f(t-a)u(t-a) f(at) sF(S)-f(0) Hint Digital Signal Processing MCQs for Exams 76). The S-domain of convolution is expressed as ______ tf(t) f(t-a)u(t-a) f(at) F(s).G(s) Hint 77). The time domain of the cross-correlation is given as _____ tf(t) f(t-a)u(t-a) f(at) f(t)*g(t) Hint 78). The bit size of DSP uniprocessor based TMS32010 is _______ 16-bit integer 8-bit integer 4-bit integer 32-bit integer Hint 79). The clock speed of DSP processor TMS32010 is _______ 10MHZ 20MHZ 30MHz None of the above Hint 80). The instruction throughput of DSP processor TMS32010 is _______ 5MIPS 15MIPS 25MIPS 35MIPS Hint 81). The MAC execution of DSP processor TMS32010 is _______ 100ns 200ns 300ns 400ns Hint 82). ____________ are the applications of beamforming Radar/sonar Navigation Signals intelligence All of the above Hint 83). The frequency of HDTV signal for FIR filtering is ______ 120MHz 130MHz 144MHz 189MHz Hint 84). The frequency of TV signal for FIR filtering is ______ 27MHz 130MHz 144MHz 189MHz Hint 85). The frequency of video phone for FIR filtering is ______ 27MHz 130MHz 144MHz 6.75MHz Hint 86). Which one is harvard architecture? DSP General purpose processor Both a and b None of the above Hint Read more about Harvard Architecture 87). The F(ω) form of δ(t) is _______ One Zero Infinity None of the above Hint 88). The F(f) form of signal Arect(t/T) is _______ ATsinc(fT) ATsinc(ωT/2) ATsinc(fT/2) None of the above Hint 89). The F(ω) form of signal Arect(t/T) is _________ ATsinc(fT) ATsinc(ωT/2) ATsinc(fT/2) None of the above Hint 90). The F(f) form of signal sinc(t) is ______ Rect.(t) Rect.(ωT/2) ATsinc(fT) None of the above Hint 91). The ROC of signal u(t) is ________ Re[s]>0 Re[s]<0 Re[s]=0 None of the above Hint 92). For steady-state analysis _______ transform is used Fourier Laplace Both a and b None of the above Hint 93). The bit size of TM320C30 DSP processor is _______ 8-bit integer 16-bit integer 32-bit integer 64-bit integer Hint 94). The clock speed of DSP processor TMS320C30 is _______ 10MHZ 20MHZ 33MHz None of the above Hint 95). The instruction throughput of DSP processor TMS320C30 is _______ 5MIPS 17MIPS 25MIPS 35MIPS Hint 96). The MAC execution of DSP processor TMS320C30 is _______ 60ns 200ns 300ns 400ns Hint 97). ________ are the applications of echo cancellation Speakerphones Signals intelligence Music None of the above Hint 98). The frequency of music for FIR filtering is _____ 10KHz 20KHz 30KHz 48KHz Hint 99). The F(ω) form of signal sinc(t) is ___________ Rect.(t) Rect.(ω/2π) 2π(ω) None of the above Hint 100). The F(ω) form of constant A is ___________ 2/jω jω 2πAδ(ω) None of the above Hint Digital Signal Processing MCQs 101). For transient signal analysis ___________ transform is used Fourier Laplace Both a and b None of the above Hint 102). The input of the discrete-time Fourier transform is ___________ Discrete Periodic signal Both a and b None of the above Hint 103). The input of the discrete Fourier transform is ___________ Discrete Periodic Discrete, periodic extension of a finite length or periodic signal None of the above Hint 104). In Fourier transform the range of ω is ________ -π to +π 0 to 2π -π to +π or 0 to 2π None of the above Hint 105). The F(f) form of signal sgn(t) is _______ 2/jω 1/jωf 2πAδ(ω) None of the above Hint 106). The F(ω) form of signal sgn(t) is _______ 2/jω 1/jωf 2πAδ(ω) None of the above Hint 107). The F(f) form of constant A is _______ Aδ(t) Aδ(f) Aδ(ft) None of the above Hint 108). The F(f) form of signal u(t) is ______ 1/j2πf + 0.5 δ(f) 1/j4πf + 0.5 δ(f) 1/j6πf + 0.5 δ(f) 1/j8πf + 0.5 δ(f) Hint 109). The range of ω in discrete Fourier transform is _____ 0 to 2π 0 to 4π 0 to 6π 0 to 8π Hint 110). The Z transform of au(n) is ______ az/z-1 az/z+1 az/z az/2z Hint 111). The spatial domain of scaling is ____ f(ax) f(x) 2f(x) None of the above Hint 112). The spatial domain of the symmetry is ____ f(ax) F(x) 2f(x) None of the above Hint 113). The frequency-domain of symmetry is ____ f(u) F(-u) uf None of the above Hint 114). The frequency domain of convolution is ____ F(u)G(u) F(-u) uf None of the above Hint 115). The F(ω) form of u(t) signal is __________ 2/jω 1/jω + πδ(ω) 2πAδ(ω) None of the above Hint 116). Which one is a mathematical tool? Fourier series Fourier transform Both a and b None of the above Hint 117). Which one is mainly used for periodic signals? Fourier series Fourier transform Both a and b None of the above Hint 118). The conditions for existence of Fourier transform are ___________ f(t) should be absolutely integrable The function must have a finite number of minima and maxima The function must have a finite number of discontinuities All of the above Hint 119). The signal can be a function of ___________ Time, distance Position, pressure Temperature All of the above Hint 120). Which one is mainly used for aperiodic signals? Fourier series Fourier transform Both a and b None of the above Hint 121). ______ is an example of modern conventional DSP T1 TMS320C54X T1 TMS320C55X T1 TMS320C64X None of the above Hint 122). ______ is an example of modern enhanced DSP T1 TMS320C54X T1 TMS320C55X T1 TMS320C64X None of the above Hint 123). ______ is an example of multiple issue DSP T1 TMS320C54X T1 TMS320C55X T1 TMS320C64X None of the above Hint 124). Which one is a superscalar DSP? LSI logic ZPS400 T1 TMS320C64X Both a and b None of the above Hint 125). ________ systems cannot implement linear phase filtering IIR systems FIR systems Both a and b None of the above Hint Digital Signal Processing MCQs for Quiz 126). In which filter the poles lie on the circle in the s-plane? Butterworth Chebyshev Both a and b None of the above Hint 127). In which filter the inductors are present? Discrete active RC filters Integrated active RC filters Passive RLC filters None of the above Hint 128). ______ are the applications of analog filters Audio equipment Sampling systems Telephone systems All of the above Hint 129). The digital systems are _________ Highly reliable Accuracy is high Physical size is small All of the above Hint 130). _______ are the applications of digital filters Instrumentation Artificial cochleas Speech synthesis All of the above Hint 131). The frequency range of discrete active RC filters is from ______ 10Hz to 1KHz 10Hz to 1MHz 10Hz to 100KHz 10Hz to 12KHz Hint 132). The frequency range of switched-capacitor filters is from ______ 10Hz to 1KHz 10Hz to 5MHz 10Hz to 100KHz 10Hz to 12KHz Hint 133). The frequency range of passive RLC filters is from ______ 10Hz to 1KHz 10Hz to 5MHz 0.1MHz to 0.1GHz 10Hz to 12KHz Hint 134). The frequency range of integrated RC filters is from ______ 10Hz to 1KHz 10Hz to 5MHz 0.1MHz to 15GHz 10Hz to 12KHz Hint 135). _____ are the examples of singularities Poles Essential singularities Branch points All of the above Hint 136). The frequency range of microwave filters is from ______ 10Hz to 1KHz 0.5GHz to 500GHz 0.1MHz to 15GHz 10Hz to 12KHz Hint 137). ______ are used in Butterworth filter Inductor Capacitor Resistor All of the above Hint 138). Which filter requires more hardware? Butterworth filters Chebyshev filters Elliptical filters None of the above Hint 139). Butterworth filters are used in _______ Communication and control systems Radar Audio processing applications All of the above Hint 140). The interface between the digital processor and an analog signal is _______ Analog to digital converter Digital to analog converter Modulator Demodulator Hint 141). The discrete-time Fourier transform is the representation of ______ time signals representation Periodic discrete Periodic continuous Aperiodic discrete None of the above Hint 142). The fast Fourier transform used to calculate ______ DFT IDFT Both a and b None of the above Hint 143). The Chebyshev filters have a _____________ Flat stop-band and Equi-ripple pass band Both a and b None of the above Hint 144). The elliptical filters have ________________ Equi ripple passband Equi ripple stop bands Both a and b None of the above Hint 145). The function of one dimension signal is _______ variable Single dependent Double independent Multiple independent None of the above Hint 146). ____________ is the process of down sampling Interpolation Decimation Both a and b None of the above Hint 147). Discrete Fourier transform applied to ________ sequences Finite continuous Finite discrete Infinite discrete Infinite continuous Hint 148). Correlation is used for ____________ Climatography Portfolio management Both a and b None of the above Hint 149). What is the standard form of DPCM? Discrete Pulse Code Modulation Differential Pulse Code Modulation Discrete Phase Code Modulation None of the above Hint 150). What is the standard form of DM? Discrete Modulation Differential Modulation Delta Modulation None of the above Hint Digital Signal Processing Important MCQs with Hints 151). In delta modulation, the quantizer is a _____ bit quantizer One Two Three Four Hint Read more about Delta Modulation 152). _________ order predictor is used in delta modulation First Second Third None of the above Hint 153). ____________ uses quadrature mirror filters Trans multiplexer Sub band coding Both a and b None of the above Hint 154). The function f(t)=f(-t) is a ________ function Even Odd Both even and odd None of the above Hint 155). To convert digital filter specifications to analog filter specifications in bilinear transformation design method for IIR filter will use _________ Transformation with frequency wrapping Transformation by low pass prototype filter Bilinear Transformation None of the above Hint 156). Once 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 Digital filter transfer function Analog or digital filter transfer function None of the above Hint 157). The function f(-t)=-f(t) is a ___________ symmetry Even Odd Both even and odd None of the above Hint 158). In bilinear transformation design method for IIR filter, an analog filter specifications transformed into analog filter transfer function by using ________ Transformation with frequency wrapping Transformation by low pass prototype filter Bilinear Transformation None of the above Hint 159). In bilinear transformation design method for IIR filter, an analog filter transfer function converted into digital filter transfer function by using ________ Transformation with frequency wrapping Transformation by low pass prototype filter Bilinear Transformation None of the above Hint 160). The advantage of using floating-point processors is to _______ Avoid overflow Roundoff error, truncation error Coefficient quantization error All of the above Hint 161). The function f(t-T/2)=-f(t) is a ______ symmetry Even Odd Half wave Full wave Hint 162). The floating-point digital signal processor performs _________ signal processing operations Digital Analog Digital or analog None of the above Hint 163). The TMS320C3X floating-point DSP processor includes ______ Integer Floating-point multiplier ALU All of the above Hint 164). The TMS320C3X supports __________ floating-point formats One type Two types Three types Four types Hint 165). The TMS320C3X floating-point DSP processor supports 16-bit floating-point format has _______ 4 exponent bits 1 sign bit 11 mantissa bits All of the above Hint 166). The TMS320C3X floating-point DSP processor supports 32-bit floating-point format has _______ 8 exponent bits 1 sign bit 23 mantissa bits All of the above Hint 167). The TMS320C3X floating-point DSP processor supports 40-bit floating-point format has _______ 8 exponent bits 1 sign bit 31 mantissa bits All of the above Hint 168). TMS320C54 family processor supports _________ 16-bit data On-chip program memory Data memory All of the above Hint 169). The TMS320C54X family processors, the on-chip program memory, and data memory includes _______ RAM ROM Both a and b None of the above Hint 170). The RAM and ROM in the TMS32C54X family processor used for _______ Program code Instructions Data All of the above Hint 171). The TMS32C54X family processor has _________ 2 independent 40-bit accumulator 2 independent 20-bit accumulator 2 independent 30-bit accumulator 2 independent 10-bit accumulator Hint 172). The TMS32C54X family processor has _________ shift units 8 bit 16 bit 40 bit None of the above Hint 173). The shift unit in the TMS32C54X processor performs __________ Scaling Fractional arithmetic Both a and b None of the above Hint 174). The 8-bit exponent in single-precision floating point will range from _________ 0 to 100 0 to 255 0 to 290 None of the above Hint 175). The double-precision floating-point representation requires _______ 8-bit word 16-bit word 32-bit word 64-bit word Hint 176). The design of general microprocessor and microcontroller is based on _________ Harvard architecture Von-Neumann architecture Both a and b None of the above Hint 177). __________ tells the CPU what to do Opcode Operand Both a and b None of the above Hint 178). ___________ informs the CPU what data to operate on Opcode Operand Both a and b None of the above Hint 179). The ___________ phase filters are used to prevent the input shape of the signals? Linear Non-linear Both a and b None of the above Hint 180). If we apply DTFT to h(n) will get ______ H(ω) H(2ω) H(3ω) H(4ω) Hint 181). IIR filter output y(n) depends on _______ x(n) x(n-1) y(n-1) All of the above Hint 182). IIR filter offers a ______ Smaller filter size Linear phase is not easy to be obtained Both a and b None of the above Hint 183). The IIR filter design main objective is to determine the filter ______ Numerator coefficient Denominator coefficient Both a and b None of the above Hint 184). The IIR filters are ____ Easy to design Easy to implement Not easy to design and not easy to implement Both a and b Hint 185). ______ are the DSP hardware units MAC Address generator Shifter All of the above Hint 186). The impulse response of a symmetric linear phase finite impulse response filter can be represented as _______ h(n)=h(m-1-n) h(n)=h(m-1+n) h(n)=h(m+1-n) h(n)=h(mn) Hint 187). What is the standard form of DIT? Decimation in Time Denominator in Time Discrete in Time None of the above Hint Time is Up! Time's up
