# Signal Classification and Properties – 2 MCQ’s

This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Signal Classification and Properties – 2″.

1. Most of the signals found in nature are _________
a) Continuous-time and discrete-time
b) Continuous-time and digital
c) Digital and Analog
d) Analog and Continuous-time

2. Which one of the following is not a characteristic of a deterministic signal?
a) Exhibits no uncertainty
b) Instantaneous value can be accurately predicted
c) Exhibits uncertainty
d) Can be represented by a mathematical equation

3. A signal is a physical quantity which does not vary with ____________
a) Time
b) Space
c) Independent Variables
d) Dependent Variables

4. Determine the fundamental period of the following signal:sin60t.
a) 1/60 sec
b) 1/30 sec
c) 1/20 sec
d) 1/10 sec

5. Determine the Time period of: x(t)=3 cos⁡(20t+5)+sin⁡(8t-3).
a) 1/10 sec
b) 1/20 sec
c) 2/5 sec
d 2/4 sec

6. Determine the odd component of the signal: x(t)=cost+sint.
a) sint
b) 2sint
c) cost
d) 2cost

7. Sum of two periodic signals is a periodic signal when the ratio of their time periods is ____________
a) A rational number
b) An irrational number
c) A complex number
d) An integer

8. What is the even component of a discrete-time signal?

a)

b)

c)

d)

9. Is the signal sin(t) anti-symmetric?
a) YES
b) NO

10. Determine the power of the signal: x(t) = cos(t).
a) 1/2
b) 1
c) 3/2
d) 2

11. A signal is anti-causal if ______________
a) x(t) = 0 for t = 0
b) x(t) = 1 for t < 0
c) x(t) = 1 for t > 0
d) x(t) = 0 for t > 0

12. For an energy signal __________
a) E=0
b) P= ∞
c) E= ∞
d) P=0

13. Is the following signal an energy signal?
x(t) = u(t) – u(t – 1)
a) YES
b) NO

14. Is the signal x(t)= eat u(t) causal?
a) YES
b) NO

15. Is the signal x(n) = u(n + 4) – u(n – 4) causal?
a) YES
b) NO

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