MATLAB Christmas

How can I get the indices from all values equal to 27 in a matrix M?

• M == 27

• M = 27

• M(M==27)

• M(27)

Executing the following code returns:

a = [1:3:10] ;

size(a)

• 1

• [10 1]

• [1 4 ]

• 4

Which of the following statements is correct?

• Function 'clear' clears only the scalar variables, but does not clear arrays

• Function 'clc' clears all variables

• Function 'clc' clears only constants

• Function 'clear a' clears all variables of the type array

• None of the above

What is the result of the following code:

M = [1,2,3; 4,5,6; 7,8,9];

numel(M)

• 3

• 3 3 3

• 9

• 3 3

Which statement is wrong

• ans is automatically created by MATLAB when a calculation is not saved in a variable

• ans is created by MATLAB when executing code without a semicolon

• ans can have any datatype

• ans is a variable name

The output of cat=[‘cat’ ‘dog’] is

• Cat&dog

• Cat dog

• Catdog

• Cat

  Dog

Which command in MATLAB performs matrix operation on elements?

• a’

• a.*b

• a^3

• a_4

What is Johannes doing when he is not programming?

• Growing Mushrooms

• Golfing

• Wrestling

• Classifying clouds (in the sky)

The num2str command

• Concatenates string

• Concatenates number and string

• Converts string to number

• Converts a number to string

How often will it beep?

• 1

• 2

• 3

• 4