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MCQ03 - Classification of Signals

This document contains a multiple choice quiz about signals and their classification. It covers topics like: - Definitions of single-valued functions, real/complex valued functions, and discrete time signals derived from continuous time signals via sampling. - Properties of even and odd signals, periodic and non-periodic signals. - Examples of deterministic, random, and periodic signals like noise generated by an amplifier. - Questions about the fundamental frequency, average power, total energy, and total power of different types of discrete time signals shown in figures.

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189 views3 pages

MCQ03 - Classification of Signals

This document contains a multiple choice quiz about signals and their classification. It covers topics like: - Definitions of single-valued functions, real/complex valued functions, and discrete time signals derived from continuous time signals via sampling. - Properties of even and odd signals, periodic and non-periodic signals. - Examples of deterministic, random, and periodic signals like noise generated by an amplifier. - Questions about the fundamental frequency, average power, total energy, and total power of different types of discrete time signals shown in figures.

Uploaded by

Nour Mmr
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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MCQ03 – Classification of Signals --

1. What is single-valued function?


a) Single value for all instants of time
b) Unique value for every instant of time
c) A single pattern is followed by after ‘t’ intervals
d) Different pattern of values is followed by after ‘t’ intervals of time

2. In real valued function and complex valued function, time is _______________


a) Real
b) Complex
c) Imaginary
d) Not predictable

3. Discrete time signal is derived from continuous time signal by _____________ process.
a) Addition
b) Multiplying
c) Sampling
d) Addition and multiplication

4. Even signals are symmetric about the vertical axis.


a) True
b) False

5. If x (-t) = -x (t) then the signal is said to be _____________


a) Even signal
b) Odd signal
c) Periodic signal
d) Non periodic signal

6. Which of the following is true for complex-valued function?


a) X (-t) = x*(t)
b) X (-t) = x(t)
c) X (-t) = – x(t)
d) X (-t) = x*(-t)

7. When x(t ) is said to be non periodic signal?


a) If the equation x (t) = x (t + T) is satisfied for all values of T
b) If the equation x (t) = x (t + T) is satisfied for only one value of T
c) If the equation x (t) = x (t + T) is satisfied for no values of T
d) If the equation x (t) = x (t + T) is satisfied for only odd values of T

8. Fundamental frequency x[n] is given by ___________


a) Omega = 2*pi /N
b) Omega = 2*pi*N
c) Omega = 4*pi *2N
d) Omega = pi / N

9. Noise generated by an amplifier of radio is an example for?


a) Discrete signal
b) Deterministic signal
c) Random signal
d) Periodic signal

10. 10. Energy signal has zero average power and power signal has zero energy.
a) True
b) False

11. What is the fundamental frequency of discrete –time wave shown in fig a?
a) π/6
b) π/3
c) 2π/8
d) π

12. Calculate the average power of the discrete-time wave shown in fig a?
a) 1
b) 6
c) 0
d) -1

13. What is the total energy of rectangular pulse shown in fig b?


a) 8A2
b) 4A
c) 2A
d) 4A2

14. What is the total power of the rectangular pulse shown in fig b?
a) 0
b) 8A2
c) ∞
d) 2A

15. What is the total energy of the signal shown in fig c


a) 6
b) 0
c) 3
d) 1

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