1st Matlab MCQ

mandatory answer

Question 1

Enter your name :

Question 2

Which proposition(s) create(s) an array of numbers (i.e. a matrix or a vector)?

A={0 1 2};

A=[1 2; 3];

A=[ ];

A=new array();

A=5:-2:1;

Question 3

Which proposition(s) is(are) correct (i.e. syntactically legal) to begin a loop ?

for(I=1; I<10; I++)

for I=1:10

for I=10:-1:1

for I=1 to 10

Question 4

A is a cell. What does A{1,2} refer to, relatively to A ?

value of A at 1st row, 2nd column

value of A at 2nd row, 3rd column

element of A (not its value) at 1st row, 2nd column

element of A (not its value) at 2nd row, 3rd column

Question 5

What does the following do ?
a = 2;
b = 3;
c = a+i*b;

it creates variable c and assign value '2+3i' to it

it creates variable c and assign value 'a+i*b' to it (a and b undefined)

it creates variable c and assign value '2' to it

it provokes an error

Question 6

What does 5:-1:0 produces/creates ?

an error

an array

a cell

a loop

Question 7

A and B are 2 square matrices. What does A*B produce/do ?

element by element product

matrices product

an error

Question 8

How to concatenate 2 character arrays (e.g. A and B) ?
A= 'str1';
B= 'str2';

C = A+B;

C = horzcat(A,B);

C = [A,B]

Question 9

A for loop is ended (enclosed) by ?

Nothing (but indentation changes)

keyword 'end'

keyword 'next'

character '}'

character ';'

Question 10

'u' is an array of numbers, 'uv' and 'umax' are numbers.
What does this produce : (u>umax)*uv

nothing or a syntax error

an overflow

a new array, containing ‘u’ values when values of u are superior to umax and ‘uv’ value otherwise

a new array, containing 1 when values of u are superior to umax and 0 otherwise

a new array, containing ‘uv’ values when values of u are superior to umax and 0 otherwise

a new array, containing ‘uv’ values when values of ‘u’ are superior to umax and ‘u’ values otherwise

Question 11

Which functions can you use to plot a 2-dimensional curve ?
(pick functions dedicated to that purpose, avoid those for 3D plotting)

plot

plotyy

bar

surf

fill

patch

plot3