# Convolution – 2 MCQ’s

This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Convolution – 2″.

1. After what instant in time will the signal output become zero?

p=conv([ones(1,100)],[ones(1,50),zeros(1,50)]);

a) 150

b) 149

c) 151

d) Error

2. The convolution of a discrete signal with itself is _________

a) Squaring the signal

b) Doubling the signal

c) Adding two signals

d) is not possible

3. For a causal L.T.I. system, the impulse response is 0 for _________

a) t<0

b) t=0

c) t>0

d) Always

4. What is the output of the following code?advertisementHow to Install Unity on Ubuntu 18.04 [Complete Procedure]

a=con([1 2],[1 2]); b=cconv([1 2],[1 2]);

a) a=b

b) a<b

c) a>b

d) a!=b

5. The convolution of a function with an impulse function delayed to an instant 3 in time results in ____________

a) An advance in the function by 3 units in time

b) The function itself

c) A delay in the function by 3 units in time

d) Cannot be determined

6. What is the output of the following code?

cconv([1 2],[0 1 0])

a) [0 1 2 0]

b) [1 2 0 0]

c) [1 2 0 0]

d) [0 0 1 2]

7. A continuous signal can be represented as the product of an impulse function and the signal itself.

a) True

b) False

8. What is the Scope value if the signal generator has a frequency of 2 Hz only?

a) An attenuated signal of same frequency

b) The entire signal at the same frequency

c) The entire signal at reduced frequency

d) An attenuated signal at reduced frequency

9. What is the inverse laplace transform of Z from the following?

P=tf([1],[1 0 0]); Q=tf([1],[1 0]); Z=P.Q;

a) t^{2}

b) t^{2}/2

c) t^{3}

d) Error

10. What is the output of the following code?

P=tf([1 2],[3 4]); Q=tf([1 2],[3 4]); Z=P.Q;

a) Z is the response of the system whose pole is at s=-4/3

b) Z is the response of the system whose pole is at s=4/3

c) Z is the response of the system whose poles are at s=-4/3 & s=+4/3

d) Z is the response of the system whose zeros are at s=-4/3

11. What is the output of the following code?

conv[1 2]

a) Error in input

b) Error in []

c) 2

d) 0

12. What is the output of the following code?

P=tf([1 2],[3 4]); Q=tf([1 2],[3 4]); Z=P.Q; ilpalace(Z)

a) Error

b) t

c) t^{2}

d) Cannot be determined

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