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Analysis of LTI System in Z Domain Multiple Choice Questions

  Analysis of LTI System in Z Domain 1. If one or more poles are located near the unit circle, then the rate of decay of signal is _________ a) Slow b) Constant c) Rapid d) None of the mentioned Answer: Slow 2. If p k , k=1,2,…N are the poles of the system and |p k | < 1 for all k, then the natural response of such a system is called as Transient response. a) True b) False Answer: True 3. If all the poles of H(z) are outside the unit circle, then the system is said to be ________ a) Only causal b) Only BIBO stable c) BIBO stable and causal d) None of the mentioned Answer: None of the mentioned 4. If all the poles have small magnitudes, then the rate of decay of signal is __________ a) Slow b) Constant c) Rapid d) None of the mentioned Answer: Rapid 5. What is the transient response of the system described by the difference equation y(n)=0.5y(n-1)+x(n) when the input signal is x(n)= 10cos(πn/4)u(n) and the system is initially at rest? a) (0.5) n u(n) b) 0.5(6.3) n u(n) c) 6.3(0.5) n

Top 40 Digital Signal Processing Objective Questions and Answers

  Top 40 Digital Signal Processing Objective Questions and Answers 1. DTFT is the representation of a) Periodic Discrete time signals b) Aperiodic Discrete time signals c) Aperiodic continuous signals d) Periodic continuous signals Answer: Aperiodic Discrete time signals 2. The interface between an analog signal and a digital processor is a) D/A converter b) A/D converter c) Modulator d) Demodulator Answer: A/D converter 3. The speech signal is obtained after a) Analog to digital conversion b) Digital to analog conversion c) Modulation d) Quantization Answer: Digital to analog conversion 4. x(n)=x(n-1)/4 with initial condition x(0)-1, gives the sequence a) x(n)= (1/4)^n b) x(n)= -(1/4)^n c) x(n)= (1/4)^-n d) x(n)= (-1/4)^-n Answer: x(n)= -(1/4)^n 5. For a system function H(s) to be stable a) The zeros lie in left half of the s plane b) The zeros lie in right half of the s plane c) The poles lie in left half of the s plane d) The poles lie in right half of the s plane Answer: The poles

Top 200 Digital Signal Processing Objective Questions and Answers

  Top 200 Digital Signal Processing Objective Questions and Answers 1. DTFT is the representation of a) Periodic Discrete time signals b) Aperiodic Discrete time signals c) Aperiodic continuous signals d) Periodic continuous signals Answer: Aperiodic Discrete time signals 2. The interface between an analog signal and a digital processor is a) D/A converter b) A/D converter c) Modulator d) Demodulator Answer: A/D converter 3. The speech signal is obtained after a) Analog to digital conversion b) Digital to analog conversion c) Modulation d) Quantization Answer: Digital to analog conversion 4. x(n)=x(n-1)/4 with initial condition x(0)-1, gives the sequence a) x(n)= (1/4)^n b) x(n)= -(1/4)^n c) x(n)= (1/4)^-n d) x(n)= (-1/4)^-n Answer: x(n)= -(1/4)^n 5. For a system function H(s) to be stable a) The zeros lie in left half of the s plane b) The zeros lie in right half of the s plane c) The poles lie in left half of the s plane d) The poles lie in right half of the s plane Answer: The poles