1) The cost of the digital processors is cheaper because
a. Processor allows time sharing among a number of signals
b. The hardware is cheaper
c. Require less maintenance
d. Less power consumption
Answer
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ANSWER: Processor allows time sharing among a number of signals
Explanation: No explanation is available for this question!


2) The operations that may be performed on vectors in Euclidean Space are
1) Inner product, distance between vectors 2) Norm of a vector, orthogonal vectors 3) Orthonormal functions 4) Vector division
a. 1, 2 and 3 are correct
b. 1 and 2 are correct
c. 1, 2 and 4 are correct
d. All the four are correct

3) The norm or length of a signal is given by
a. The square of the energy of the signal
b. The square root of the energy of the signal
c. The inverse of the energy of the signal
d. The cube root of the energy of the signal

4) The principle of GramSchmidt Orthogonalization (GSO) states that, any set of M energy signals can be expressed as
a. Summation of N ortho normal basis functions, where N ≤ M.
b. Linear combinations of N ortho normal basis functions, where N ≤ M.
c. Product of logarithmic combinations of N ortho normal basis functions, where N ≤ M.
d. Product of inverse squares of N ortho normal basis functions, where N ≤ M.
Answer
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ANSWER: Linear combinations of N ortho normal basis functions, where N ≤ M.
Explanation: No explanation is available for this question!


5) A signal x[n] is anti symmetric or odd when
a. x[n] = x[n] • x[n]
b. x[n] = x[n]
c. x[n] = [x[n]]^{2}
d. x[n] = x[n]

6) Time shifting of discrete time signal means
a. y[n] = x[nk]
b. y[n] = x[nk]
c. y[n] = x[nk]
d. y[n] = x[n+k]

7) Time reversal of a discrete time signal refers to
a. y[n] = x[n+k]
b. y[n] = x[n]
c. y[n] = x[nk]
d. y[n] = x[nk]

8) Causal systems are the systems in which
a. The output of the system depends on the present and the past inputs
b. The output of the system depends only on the present inputs
c. The output of the system depends only on the past inputs
d. The output of the system depends on the present input as well as the previous outputs
Answer
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ANSWER: The output of the system depends on the present and the past inputs
Explanation: No explanation is available for this question!


9) The basic properties of DFT includes
1) Linearity 2) Periodicity 3) Circular symmetry 4) Summation
a. 1, 2 and 3 are correct
b. 1, 2 and 4 are correct
c. 1 and 3 are correct
d. All the four are correct

10) Padding of zeros increases the frequency resolution.
a. True
b. False

11) Circular shift of an N point is equivalent to
a. Circular shift of its periodic extension and its vice versa
b. Linear shift of its periodic extension and its vice versa
c. Circular shift of its aperiodic extension and its vice versa
d. Linear shift of its aperiodic extension and its vice versa
Answer
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ANSWER: Linear shift of its periodic extension and its vice versa
Explanation: No explanation is available for this question!


12) The circular convolution of two sequences in time domain is equivalent to
a. Multiplication of DFTs of two sequences
b. Summation of DFTs of two sequences
c. Difference of DFTs of two sequences
d. Square of multiplication of DFTs of two sequences

13) For the calculation of N point DFT, Radix 2 FFT algorithm repeats
a. 2(N Log2 N) stages
b. (N Log2 N)^{2}/2 stages
c. (N Log2 N)/2 stages
d. (N Log2(2 N))/2 stages

14) Radix  2 FFT algorithm performs the computation of DFT in
a. N/2Log2 N multiplications and 2Log2 N additions
b. N/2Log2 N multiplications and NLog2 N additions
c. Log2 N multiplications and N/2Log2 N additions
d. NLog2 N multiplications and N/2Log2 N additions
Answer
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ANSWER: N/2Log2 N multiplications and NLog2 N additions
Explanation: No explanation is available for this question!


15) The overlap save method is used to calculate
a. The discrete convolution between a sampled signal and a finite impulse response (FIR) filter
b. The discrete convolution between a sampled signal and an infinite impulse response (IIR) filter
c. The discrete convolution between a very long signal and a finite impulse response (FIR) filter
d. The discrete convolution between a very long signal and a infinite impulse response (IIR) filter
Answer
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ANSWER: The discrete convolution between a very long signal and a finite impulse response (FIR) filter
Explanation: No explanation is available for this question!


16) OverlapAdd Method Deals with principles that
a. The linear convolution of a discretetime signal of length L and a discretetime signal of length M produces a discretetime convolved result of length L + M  1
b. The linear convolution of a discretetime signal of length L and a discretetime signal of length M produces a discretetime convolved result of length L + M
c. The linear convolution of a discretetime signal of length L and a discretetime signal of length M produces a discretetime convolved result of length 2L + M  1
d. The linear convolution of a discretetime signal of length L and a discretetime signal of length M produces a discretetime convolved result of length 2L + 2M  1
Answer
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ANSWER: The linear convolution of a discretetime signal of length L and a discretetime signal of length M produces a discretetime convolved result of length L + M  1
Explanation: No explanation is available for this question!


17) ROC does not have
a. zeros
b. poles
c. negative values
d. positive values

18) Damping is the ability of a system
a. To support oscillatory nature of the system’s transient response
b. To oppose the continuous nature of the system's transient response
c. To oppose the oscillatory nature of the system's transient response
d. To support the discrete nature of the system's transient response
Answer
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ANSWER: To oppose the oscillatory nature of the system's transient response
Explanation: No explanation is available for this question!


19) The condition for a system to be causal is
a. All poles of its transfer function must be left half of splane
b. All poles of its transfer function must be right half of splane
c. All zeros of its transfer function must be right half of splane
d. All zeros of its transfer function must be left half of splane
Answer
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ANSWER: All poles of its transfer function must be right half of splane
Explanation: No explanation is available for this question!


20) The condition for a system to be stable is
a. All poles of its transfer function lie on the left half of splane
b. All poles of its transfer function must be right half of splane
c. All zeros of its transfer function must be right half of splane
d. All zeros of its transfer function must be left half of splane
Answer
Explanation
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ANSWER: All poles of its transfer function lie on the left half of splane
Explanation: No explanation is available for this question!


21) Partial fraction method involves
a. Allotting coefficients
b. Dividing the numerator by denominator to get fractions
c. Dividing single fraction into parts
d. None of the above

22) The factors formed for partial fraction are a combination of
1) Linear factors 2) Irreducible quadratic factors 3) Square roots 4) Cube roots
a. 1, 2 and 3 are correct
b. 1 and 2 are correct
c. 2 and 3 are correct
d. All the four are correct

23) For a partial fraction method to be followed,
1) The degree of the numerator must be more than the degree of the denominator. 2) The factors formed for partial fraction are a combination of Linear factors and Irreducible quadratic factors. 3) The degree of the numerator must be less than the degree of the denominator. 4) The factors formed for partial fraction are a combination of Linear factors and Square roots.
a. 1, 2 and 3 are correct
b. 1 and 2 are correct
c. 2 and 3 are correct
d. All the four are correct

24) The partial fraction of x^{2}+1/x(x1)^{2} is
a. 1/ (x1) + 2/(x1)^{2}  1/x
b. 1/ (x1) + 2/(x1)^{2}  3/x
c. 1/ (x1) + 2/(x1)^{2}  3/x^{2}
d. 1/ (x+1) + 2/(x+1)^{2}  1/x

25) The impulse invariant method is obtained by
a. Sampling the impulse response of an equivalent analog filter
b. Taking backward difference for the derivative
c. Mapping from sdomain to zdomain
d. Approximation of derivatives
Answer
Explanation
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ANSWER: Sampling the impulse response of an equivalent analog filter
Explanation: No explanation is available for this question!


26) The transformation technique in which there is one to one mapping from sdomain to zdomain is
a. Approximation of derivatives
b. Impulse invariance method
c. Bilinear transformation method
d. Backward difference for the derivative

27) The frequency warping is referred as
1) lower frequencies in analog domain expanded in digital domain 2) lower frequencies in digital domain expanded in analog domain 3) non linear mapping 4) compression of higher frequencies
a. 1, 3 and 4 are correct
b. 2 and 4 are correct
c. 2 and 3 are correct
d. All the four are correct

28) The magnitude response of Butterworth filter has
1) Flat stop band 2) Flat pass band 3) Tapering pass band 4) Tapering stop band
a. 1 and 2 are correct
b. 2 and 4 are correct
c. 2 and 3 are correct
d. All the four are correct

29) In the cascaded form of realisation, the polynomials are factored into
a. a product of 1storder and 2ndorder polynomials
b. a product of 2ndorder and 3rdorder polynomials
c. a sum of 1storder and 2ndorder polynomials
d. a sum of 2ndorder and 3rdorder polynomials
Answer
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ANSWER: a product of 1storder and 2ndorder polynomials
Explanation: No explanation is available for this question!


30) Parallel form of realisation is done in
a. High speed filtering applications
b. Low speed filtering applications
c. Both a and b
d. None of the above

31) A partialfraction expansion of the transfer function in Z^{1} leads to
a. The parallel form II structure
b. The parallel form I structure
c. Cascaded structure
d. None of the above

32) A direct partialfraction expansion of the transfer function in Z leads to
a. The parallel form II structure
b. The parallel form I structure
c. Cascaded structure
d. None of the above

33) Basically, group delay is the delayed response of filter as a function of ________.
a. Phase
b. Amplitude
c. Frequency
d. All of the above

34) A filter is said to be linear phase filter if the phase delay and group delay are _______
a. High
b. Moderate
c. Low
d. Constant

35) Which among the following has/have a provision to support an adaptive filtering mechanism?
a. IIR
b. FIR
c. Both a and b
d. None of the above

36) Which is/are the correct way/s for the result quantization of an arithmetic operation?
a. Result Truncation
b. Result Rounding
c. Both a and b
d. None of the above

37) In direct form realization for an interpolator, which among the following generates an intermediate signal?
a. Upsampler
b. Downsampler
c. Antiimaging filter
d. Antialiasing filter

38) To change the sampling rate for better efficiency in two or multiple stages, The decimation and interpolation factors must be _________unity.
a. Less than
b. Equal to
c. Greater than
d. None of the above

39) Which address/es is/are generated by Program Sequences?
a. Data Address
b. Instruction Address
c. Both a and b
d. None of the above

40) In DAGs, which register/s provide/s increment or step size for index register especially during the register move?
a. Index Register
b. Length & Base Register
c. Modify Register
d. All of the above
