# Recent questions and answers in Digital Signal Processing

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What are the advantages of a digital signal?

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A unit ramp function when integrated yields: A) unit parabolic function B) unit ramp function C) unit doublet D) unit impulse function

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The spectrum of discrete-time Fourier transform will be:  a. Periodic and discrete b. Aperiodic and continuous c. Periodic and continuous d. Aperiodic and discrete

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On different unit impulse function results in   (A) Unit parabolic function (B) Unit triplet (C) Unit doublet (D) Unit ramp function

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A system is causal if the output of any time depends only on   (A) Values of input in the past and in the future (B) Values of input at that time and in the past (C) Values of input at that time and in the future (D) none

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The Match Filter  (A) is a high-pass filter  (B) is a low-pass filter  (C) is an optimum system for detecting known signal in the presence of Gaussian noise  (D) is a system to detect arbitrary signal in the presence of noise

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For a discrete time filter to be causal and to have exact linear phase (A) Its impulse response must be of infinite length (B) Its impulse response can be of any length (C) The signal should be left sided (D) Its impulse response must be of finite length

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Integration of step signal gives (A) Impulse signal. (B) Ramp function. (C) Parabola. (D) Square pulse.

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The Fourier Transform of a discrete and aperiodic signal is: A) Continuous and aperiodic B) Continuous and periodic C) Discrete and aperiodic D) Discrete and periodic

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The signal x(t) = sin(t)/t is  A) Even function B) Odd function C) Neither odd nor even D) Both odd and even

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The FS of a periodic continuous-time signal x(t) is  A) Continuous Complex-valued function B) Discrete Real-valued function C) Continuous Real-valued function D) Discrete Complex-valued function

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What is the use of Fast Fourier Transform?

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What is the difference between DFT and FFT?

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What is the use of Z transform?

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What is the meaning of DFT?

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What is the use of DFT in DSP?

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Can you convert analog signal to digital?

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What is the use of digital signal processing?

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How does signal processing work?

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What are digital signals used for?

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Why digital signal processing is important?

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7.24 Consider the finite-duration signal x(n) = {1,2,3,1} (a) Compute its four point DFT by solving explicitly the 4-by-4 system of linear equations defined by the inverse DFT formula. (b) Check the answer in part (a) by computing the four-point DFT, using its defination.

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Linear Time Invariant (LTI) System

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Sampling of Analogue Signals

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