June 12, 2021

# Complex Arithmetic MCQ’s

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This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Complex Arithmetic”.

1. What is the class of the complex number?
a) double
b) symbolic
c) character
d) array

2. What is the argument of -1-i in MATLAB?
a) -3*pi/4
b) pi/4
c) 5*pi/4
d) -7*pi/4

3. Which command is used to find the argument of a complex number?
a) atan2()
b) args()
c) abs()
d) cannot be determined

4. The modulus of z, z conjugate and -z are not equal in MATLAB.
a) True
b) False

5. What will be the output of the following code?

`z=2+3i/(i99)`

a) z conjugate
b) -z
c) -3+(2*i)
d) -1

6. What will be the output of the following code?

`atan2(-1,1)`

a) Error
b) -pi/4
c) -.7854
d) 0

8. Which of the following command can be is used for complex arithmetic?
a) abs()
b) atan()
c) realc()
d) imagc()

9. What is the output of the following code?

`t=-i:.01*i:i; p=exp(2*t);plot(t,p)`

a) a sinusoidal signal
b) an exponential signal
c) a discrete sinusoidal
d) no plot

10. What will be the output of the following code?

`abs(i)`

a) 1
b) -1
c) Error
d) i

8. What is the command used to check the real part of a complex number in MATLAB?
a) abs()
b) realc()
c) real()
d) cannot be checked 5 Star
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