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4th Matlab MCQ paper

Questions about lectures #1 to #5 and beginning of lecture #6
For each question, choose the correct solution(s).
One or more propositions can be correct.

mandatory answer

Question 1

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, ...

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) accross different callback functions you can :

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

use the keyword "global" to access user defined variables (if defined once as global)

use the keyword "global" to 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 :

handles.data=value;

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

handles.data=value; uigetfile(handles);

uncheck

Question 5

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

sequence of characters

floating point numbers

integers

Question 6

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

sequence of characters

floating point numbers

integers

Question 7

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

nothing

create a text file and write 1.123456789 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

Question 8

What is the best function to read a file, line by line (formated data) ?

fgetl

fread

fscanf

Question 9

What is the best function to read a table (=array) into a file (formated data) ?

fgetl

fread

fscanf

Question 10

What is the best function to read binary data into a file ?

fgetl

fread

fscanf

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4th Matlab MCQ paper

Name

thanks to the GUIDE tool, you can:

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

Which statement will save data into handles in order to share it between callbacks :

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

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

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

What is the best function to read a file, line by line (formated data) ?

What is the best function to read a table (=array) into a file (formated data) ?

What is the best function to read binary data into a file ?

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