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. Unilateral Laplace Transform is applicable for the determination of linear constant coefficient differential equations with ________
A. Zero initial condition
B. Non-zero initial condition
C. Zero final condition
D. Non-zero final condition
2. For a ______ channel,the Nyquist bit rate formula defines the theoretical maximum bit rate.
A. noisy
B. noiseless
C. bandpass
D. low-pass rate
3. Double integration of a unit step function would lead to
A. an impulse
B. a parabola
C. a ramp
D. a doublet
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. 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
6. For a second order system, damping ratio ? is such that 0 < ? <. Then the roots of characteristic equation are
A. real but not equal
B. imaginary
C. complex conjugate
D. real and equal
7. 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
8. 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
9. 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
10. Which among the following belongs to the category of non-recursive systems?
A. Non-causal IIR Systems
B. Causal IIR Systems
C. Non-causal FIR Systems
D. Causal FIR Systems
11. The Fourier series of an odd periodic function contains
A. odd harmonics only
B. even harmonics only
C. cosine harmonics only
D. sine harmonics only
12. Generally, the convolution process associated with the Laplace Transform in time domain results into________
A. Simple multiplication in complex frequency domain
B. Simple division in complex frequency domain
C. Simple multiplication in complex time domain
D. Simple division in complex time domain
13. 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
14. Baseband transmission of a digital signal is possible only if we have a ____ channel.
A. low-pass
B. bandpass
C. low rate
D. high rate
15. If f(t) is an even function, the coefficients Fn in the exponential form of Fourier series
A. are real
B. are imaginary
C. are complex
D. may be real or imaginary
16. 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
17. Which of the following is/are not a property/properties power spectral density function Sx(?)?
A. Sx(?) is real function of ?
B. Sx(?) is a even function of ?
C. Sx(?) is a odd function of ?
D. Sx(?) is non-positive function of ?Sx(?) ? 0 for all ?
18. A sine wave in the ______ domain can be represented by one single spike in the _____ domain.
A. time; frequency
B. frequency; time
C. time; phase
D. phase; time
19. 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
20. Damped sinusoids are _____
A. sinusoid signals multiplied by growing exponentials
B. sinusoid signals divided by growing exponentials
C. sinusoid signals multiplied by decaying exponentials
D. sinusoid signals divided by decaying exponentials
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