VidyaVikasPratishtan
Institute of Engineering & Technology, Solapur
Department of Electronics and telecommunication engineering
(Academic Year 2019-20)
First Test Subject: - SS Date: 11/02/2020
Class: - SY Time: -1-2 pm Max. Marks- 20
Q.1. Multiple choice questions (1*5=5)
1. If x[4-n] is derived from the x[n] by which transformation?
a) Reversal and shift b) reversal only c) Scaling d) scaling and shifting
2. Mathematically unit impulse is a derivative of
a) Unit step b) unit ramp c) Unit parabola d) none
3. With u(n) as unit step function, u(n)-u(n-1) is
a) δ(n) b) δ(n)+ δ(n-1) c) δ(n)- δ(n-1) d) δ(n)+ δ(n+1)
4. With u(n) as unit step function, u(n)-u(n-2) is
a) δ(n) b) δ(n)+ δ(n-1) c) δ(n)- δ(n-2) d) δ(n)+ δ(n+1)
5. A discrete time signal is represented as
a) x(n) b) x(t) c) u(n) d) δ(n)
6. Time transformations are
a) Time shifting b) Time scaling c) Time reversal d) All
Q.2. Attempt any three (5*3=15)
a) Explain the Even and Odd signal with example.
b) Find even and odd part of following signal
c) For the signal shown in fig. find following 1. x(2t+1) 2. x(3-2t)
d) For the signal shown in fig. find following 1. x(n-1) 2.x(2-n)
e) Find energy or power signal x(t)=cost
