# Random Number Generation MCQ’s

This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Random Number Generation”.

1. What is the output of the following command?

randi(10 5,3)

a) Error

b) A 5*3 matrix of random numbers

c) A 5*3 matrix of random numbers in the interval [1,10]

d) A 583 matrix of random numbers evenly spaced in the interval [1,10]

2. What is the output of the following code?

rng(‘shuffle’)

a) Control the random number generator

b) Control the filter design process

c) Control the IIR design process

d) Control the FIR design process

3. What is the output of the following code?

T=rand + i*rand

a) A complex number whose real and imaginary parts are whole numbers

b) A complex number whose real and imaginary parts are fractions

c) A complex number whose real and imaginary parts are in the interval (0,1)

d) A complex number whose real and imaginary parts in the interval [0,1]

4. The output of the following code

randn[(3,4)]

a) Error

b) A random set of numbers from the normalized normal distribution

c) A random set of numbers from the range 3,4

d) A random set of numbers from the normal distribution ranging from 3 to 4

5. The randn command generates random numbers by following a _________

a) Normal distribution

b) Normalized Normal Distribution

c) Uniform Distribution

d) Bernoulli’s Distribution

6. What is the class of the variable r after the following code is run?

r=rand(1,4,’double’)

a) Array

b) Single

c) Double

d) Integer

7. What is the error in the following command?

randn[Inf]

a) Error due to Inf

b) Syntactical error

c) Misspelled command

d) No error

8. The linspace command generates pseudorandom numbers.

a) True

b) False

9. What is the output of the following code?

randi(10,1,9)

a) 9 unique values with replacement in the interval [1,10)

b) 9 values with replacement in the interval (1,10]

c) 9 unique values with replacement in the interval (1,10)

d) 9 values with replacement in the interval [1,10]

10. The range of numbers returned by the following code is:

randperm(1,9)

a) [1,9]

b) (1,9)

c) [1,9)

d) (1,9]

11. What is the output of the following code?

rand(2,’signed’)

a) A 2*2 matrix of signed data type

b) A 2 element vector of signed data type

c) A 2 element vector

d) Error

12. The rand command is provided by the __________

a) Parallel Computing Toolbox

b) Signal Processing Toolbox

c) Symbolic Math Toolbox

d) Does not exist

13. What is the output of the following code?

c=makedist(‘normal’);random(c)

a) An array of random numbers selected from the normalized normal distribution

b) Error due to makedist

c) A random number from the normalized normal distribution

d) Error due to random

14. What is the default return type of the rand command?

a) Single

b) Double

c) Signed

d) Unsigned

15. What is the output of the following code?

makedist(‘normal’)

a) Error

b) A normal distribution

c) A list of numbers selected randomly from the normal distribution

d) A normalized normal distribution

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