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ECE - Practice Test - 15

Q1:

Which is a typical application of digital signal processing?

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Digital Signal Processing
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Q2:

Which type of programming is typically used for digital signal processors?

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Nerist_ECE
Section:
Digital Signal Processing
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Q3:

What do we call the manipulation of an analog signal in a digital domain?

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Nerist_ECE
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Digital Signal Processing
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Q4:

How are unwanted frequencies removed prior to digital conversion?

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Digital Signal Processing
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Q5:

Which of the following best defines Nyquist frequency?

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Digital Signal Processing
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Q6:

What is the result of taking more samples during the quantization process?

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Nerist_ECE
Section:
Digital Signal Processing
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Q7:

The discrete-time signal x(n) = (-1)n is periodic with fundamental period

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Nerist_ECE
Section:
Digital Signal Processing
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Q8:

The frequency of a continuous time signal x(t) changes on transformation from x(t)  to x(at), a>0 by a factor

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Nerist_ECE
Section:
Digital Signal Processing
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Q9:

The unit impulse response of a linear time invariant system is the unit step function u(t). For t > 0, the response of the system to an excitation e-atu(t), a>0, will be

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Nerist_ECE
Section:
Digital Signal Processing
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Q10:

The z-transform of the function ∑δ(n-k)k=-∞0 has the following region of convergence

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Digital Signal Processing
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Q11:

A given system is characterized by the differential equation:    dy2(t)dt2-dy(t)dt-2y(t)=x(t)

The system is

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Nerist_ECE
Section:
Digital Signal Processing
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Q12:

The system characterized by the equation y(t)=ax(t)+b is

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Section:
Digital Signal Processing
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Q13:

The impulse response of a system is h(n)=anu(n). The condition for the system to BIBO stable is

 

 

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Section:
Digital Signal Processing
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Q14:

The continuous time system described by y(t)=x(t2) is

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Digital Signal Processing
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Q15:

Which of the following is true for the system represented by y(n)=x(-n)

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Nerist_ECE
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Digital Signal Processing
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Q16:

To obtain x(4-2n) from the given signal x(n) the following precedence (or priority) rule is used for operations on the independent variable n:

 

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Nerist_ECE
Section:
Digital Signal Processing
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Q17:

Convolution is used to find:

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Section:
Digital Signal Processing
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Q18:

If a signal f(t) has energy E, the energy of signal f(2t)is equal to

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Nerist_ECE
Section:
Digital Signal Processing
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Q19:

The odd part of the signal f(t)=tsint is

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Digital Signal Processing
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Q20:

If x(n) and X(k) are an N-point DFT pair, then X(k+N)=?

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Nerist_ECE
Section:
Digital Signal Processing
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Q21:

If X1(k) and X2(k) are the N-point DFTs of X1(n) and x2(n) respectively, then what is the N-point DFT of x(n)=ax1(n)+bx2(n)?

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Nerist_ECE
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Digital Signal Processing
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Q22:

If x(n)=Aejωn is the input of an LTI system and h(n) is the response of the system, then what is the output y(n) of the system?

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Nerist_ECE
Section:
Digital Signal Processing
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Q23:

What is the magnitude of H(ω) for the three point moving average system whose output is given by y(n)=13[x(n+1)+x(n)+x(n−1)]?

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Nerist_ECE
Section:
Digital Signal Processing
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Q24:

What is the process of converting a signal from a given rate to a different rate?

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Section:
Digital Signal Processing
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Q25:

What is the process of reducing the sampling rate by a factor D?

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Nerist_ECE
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Digital Signal Processing
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