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1., Which window function is also regarded as 'Raised-cosine window'?, a. Hamming window, b. Hanning window, c. Barlett window, d. Blackman window, 2., FIR filters ________, A. are non-recursive, B. do not adopt any feedback, C. are recursive, D. use feedback, a. A & B, b. C & D, c. A & D, d. B & C, 3., , Which among the following represent/s the characteristic/s of an ideal filter?, , a. Constant gain in passband, b. Zero gain in stop band, c. Linear Phase Response, d. All of the above, 4., The roots of the polynomial H(z) are identical to the roots of the polynomial, H(z-1)., a) True, b) False, 5., IIR filters, a) Use feedback, b) Are sometimes called recursive filters, c) Can oscillate if not properly designed, d) all of the above, 6., , A Blackman window can eliminate ripple in FIR filters. The tradeoff is, a) larger transition bandwidth, b) smaller transition bandwidth, c) a non-linear phase response, d) possible instability, , 7., , The inverse Fourier transform, a) converts from the frequency domain to the time domain, b) converts from the time domain to the frequency domain

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c) converts from the phasor domain to the magnitude domain, d) is used to make real-time spectrum analyzers, 8., Which of the following is used to alter FIR filter coefficients so they smoothly, approach zero at both ends?, a) rectangular window, b) Blackman window, c) Laplace window, d) Hilbert window, 9., , What is FIR filter?, , a. FIR filters are “finite” there is a specific limit to the number of times that any, delayed sample is added to a new input sample., b. FIR filters are “finite” there is a specific limit to the number of times that any delayed, sample is added to a new output sample., c. a & b, d. none of above, 10., FIR filters have ……., and IIR filters have ………., a. Zeros, poles & zeros, b. poles & zeros, Zeros, c. Zeros, zeros, d. none of above, 11., , How to define IIR filters term as infinite:, , a. As with any feedback device, create a loop, hence the term infinite., b. As with any non-feedback device, create a loop, hence the term infinite., c. As with any feedback device, create a open loop, hence the term infinite., d. None of above, 12., , The filter coefficients are stored in:, , a. binary registers, b. digital system, c. binary memory, d. none, 13., , the process of quantization is introduce, , a. error

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b. noise, c. power, d. none, 14., , FIR filters are ….. generally as sensitive to coefficient roundoff., , a. not, b. less, c. most, d. none of above, 15., FIR filters often require more computation, because you must do ………… for, each term in the impulse response., a. a multiply-add, b. add, c. multiply, d. all of above, 16., What is the unit sample response corresponding to Hd(ω)?, a) cosπnn, b) sinπnn, c) n.sin πn, d) n.cos⁡ πn, 17., Which of the following methods are used to convert analog filter into digital, filter?, a) Approximation of Derivatives, b) Bilinear transformation, c) Impulse invariance, d) All of the mentioned, 18., Which of the following is a representation of system function?, a) Normal system function, b) Laplace transform, c) Rational system function, d) All of the mentioned, 19., When an application requires a linear phase filter, it should be an FIR filter., a) True, b) False, 20., By impulse invariance method, the IIR filter will have a unit sample response h(n), that is the sampled version of the analog filter., a) True, b) False, 21., What is the equation for normalized frequency?, a) F/Fs, b) F.Fs, c) Fs/F, d) None of the mentioned

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22., Aliasing occurs if the sampling rate Fs is more than twice the highest frequency, contained in X(F)., a) True, b) False, 23., Which of the following filters cannot be designed using impulse invariance, method?, a) Low pass, b) Band pass, c) Low and band pass, d) High pass