# Convolution – 1 MCQ’s

This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Convolution – 1″.

1. The unit step response of an L.T.I. system is the convolution of a step signal and it’s ________

a) Impulse response

b) Ramp response

c) Parabolic response

d) Time response

2. What is the working of the conv2() command?

a) 2-d convolution

b) 1-d convolution

c) 3-d convolution

d) n-d convolution

3. What is the output of the following code?

conv([1 2],[3 4])

a) [3 10 8]

b) [8 10 3]

c) [3 8]

d) [4 6]

4. What is the output of the following code?

conv([1;3],[1;3])

a) A column vector of 1 6 9

b) A row vector of 9 6 1

c) A row vector of 1 6 9

d) A column vector of 9 6 1

5. What is the output of the following code?

conv[1 2]

a) Error in input

b) Error in []

c) 2

d) 0

6. What is the output of the following code?

>>p=conv([ones(1,100)],[ones(1,100)]); >>x=[1:1:199]; >> plot(x,p)

a) A triangular pulse

b) A step pulse

c) A sinusoid

d) Error

7. What is the output of the following code?

conv(3,9)

a) 27

b) 3

c) 9

d) Error

8. What is the length of the output?

p=conv([ones(1,150)],[ones(1,150)]);

a) 299

b) 298

c) 300

d) Error

9. What is the output of the following code?

conv([1],[2;3])

a) A column vector of 2 and 3

b) A column vector of 3 and 2

c) A row vector of 3 and 2

d) A row vector of 2 and 3

10. What is the dimension of the output?

conv([1;2],[1;2])

a) 1*3

b) 1*4

c) 1*2

d) 2*2

11. What is the output of the following code?

conv({1 2},{3 4})

a) Error

b) 6 8

c) 3 8

d) 3 10 8

12. What is the shape output of the following code?

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

a) A trapezoid

b) A rectangular pulse

c) A triangular pulse

d) Error

13. The signal get shifted by 1 units in time due to the following code: conv([ 1 2 3],[ 0 1 0 ]).

a) True

b) False

14. What is the peak value of the output graph from the following code?

>>q=conv([1 2],[2 1]); >> plot([0 1 2],q)

a) 5

b) 4

c) 1

d) Error

15. The output of p=conv([ones(1,50)],[ones(1,100)]) and p=conv([ones(1,100)],[ones(1,50)]) are same.

a) True

b) False

## Average Rating