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4th Matlab MCQ

For each question, click on the correct solutions(s). One or more propositions can be correct.

mandatory answer

Question 1

Enter your name :

Question 2

Thanks to the GUIDE tool, you can:

create a window and add controls to it, such as buttons, ploting areas, labels, comboboxes, ...

do call back function to call asynchronously (=whenever you want) some matlab code

do toasts and coffee

create user-friendly interfaces for windows environment

Question 3

If you want to access data (variables and/or controls) across different callback functions you can:

do it without specifying anything (since all variables are accessible everywhere in the code)

use the keyword "global" to access user-defined variables (if those are defined as "global" in every function they are used)

use the keyword "global" to directly access controls (such as button, ...)

use the object "handles" which is always defined for a callback function

Question 4

Which statement will save data into handles in order to share it between callbacks and in the entire code:

handles.data=value;

handles.data=value; guidata(hObject, handles);

handles.data=value; uigetfile(handles);

uncheck

Question 5

How to transpose 'A' (simple transposition, NOT complex transposition) ?

A.'

transpose(A)

transp(A)

Question 6

When specifying format to fprintf function, %c stands for:

sequence of characters

floating point numbers

integers only

Question 7

When specifying format to fprintf function, %f stands for:

sequence of characters

floating point numbers

integers only

Question 8

What does the following statements exactly do :
fid=fopen('tempfile2.txt', 'w');
fprintf(fid, '%7.3f', 1.123456789);
fclose(fid);

nothing

create a text file and write “1.1234567” into it

create a text file and write “1.123456” into it

create a text file and write “1.123” into it

create a text file and write “1.123e0” into it

create a file and write the floating point number 1.123456789 in binary format into it

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