A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. Which property of periodic signal in DTFS gets completely clarified / identified by the equation x (n n0 )?
A. Conjugation
B. Time Reversal
C. Frequency Shifting
D. Time Shifting
2. What would happen if the value of term [(m-x) / (? ? 2)] increases in the expression of Guassian CDF?
A. Complementary error function also goes on increasing
B. Complementary error function goes on decreasing
C. Complementary error function remains constant or unchanged
D. Cannot predict
3. Which type of system response to its input represents the zero value of its initial condition?
A. Zero state response
B. Zero input response
C. Total response
D. Natural response
4. What is the value of an area under the conditional PDF ?
A. Greater than 0 but less than 1
B. Greater than 1
C. Equal to 1
D. Infinite
5. According to the time-shifting property of Laplace Transform, shifting the signal in time domain corresponds to the ______
A. Multiplication by e-st0 in the time domain
B. Multiplication by e-st0 in the frequency domain
C. Multiplication by est0 in the time domain
D. Multiplication by est0 in the frequency domain
6. For a ______ channel,the Nyquist bit rate formula defines the theoretical maximum bit rate.
A. noisy
B. noiseless
C. bandpass
D. low-pass rate
7. The theoretical power of white noise is
A. infninite
B. depend upon frequency of signal
C. finite
D. zero
8. What does the spectral density function of any signal specify?
A. Distribution of energy or power
B. Consumption of energy or power
C. Conservation of energy or power
D. Generation of energy or power
9. Double integration of a unit step function would lead to
A. an impulse
B. a parabola
C. a ramp
D. a doublet
10. Which among the following operations is/are not involved /associated with the computation process of linear convolution?
A. Folding Operation
B. Shifting Operation
C. Multiplication Operation
D. Integration Operation
11. Which property of fourier transform gives rise to an additional phase shift of -2? ftd for the generated time delay in the communication system without affecting an amplitude spectrum ?
A. Time Scaling
B. Linearity
C. Time Shifting
D. Duality
12. The ESD of a real valued energy signal is always ________
A. An even (symmetric) function of frequency
B. An odd (non-symmetric) function of frequency
C. A function that is odd and half-wave symmetric
D. None of the above
13. A system which is linear is said to obey the rules of
A. homogeneity
B. scaling
C. additivity
D. both scaling and additivity
14. The integral of k u(t) is
A. 1/k ?(t)
B. k ?(t)
C. a ramp of slope 1/k
D. a ramp of slope k
15. Duality Theorem / Property of Fourier Transform states that _________
A. Shape of signal in time domain & shape of spectrum can be interchangeable
B. Shape of signal in frequency domain & shape of spectrum can be interchangeable
C. Shape of signal in time domain & shape of spectrum can never be interchangeable
D. Shape of signal in time domain & shape of spectrum can never be interchangeable
16. According to Rayleighs theorem, it becomes possible to determine the energy of a signal by________
A. Estimating the area under the square root of its amplitude spectrum
B. Estimating the area under the square of its amplitude spectrum
C. Estimating the area under the one-fourth power of its amplitude spectrum
D. Estimating the area exactly half as that of its amplitude spectrum
17. Which result is generated/ obtained by the addition of a step to a ramp function ?
A. Step function of zero slope
B. Ramp function of zero slope
C. Ramp Function shifted by an amount equal to step
D. Step Function shifted by an amount equal to ramp
18. A signal g(t) = A then g(t) is a
A. energy signal
B. power signal
C. neither energy nor power signal
D. insufficient data
19. The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ? t ? a and f(t) = 0 for t > a is
A. a step function
B. a pulse function
C. a shifted step function originating at t = a
D. unit step function
20. The tree selected for the formation of state equations contains
A. all voltage sources
B. all capacitors
C. all inductors and current sources
D. all voltage sources and maximum number of capacitors
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