MATLAB

Question 1

What does Matlab stand for?

Answer 1

Matrix Laboratory

Question 2

What symbol precedes all comments in Matlab?

Answer 2

%

Question 3

Which of the following is not a pre-defined variable in Matlab

Answer 3

Gravity

Question 4

This Matlab command clears all data and variables stored in memory

Answer 4

Clear

Question 5

Characters in Matlab are represented in their value in memory

Answer 5

ASCII

Question 6

What is not an aspect of a for/while loop

Answer 6

Runner

Question 7

To better manage memory and prevent unnecessary memory allocations, Matlab uses:

Answer 7

Delayed copy

Question 8

To print a newline in a fprintf statement, you must use the following escape character l

Answer 8

\n

Question 9

In Matlab, this keyword immediately moves to the next iteration of the loop

Answer 9

continue

Question 10

Which of the following will correctly define x,y, and z as symbols?

Answer 10

syms x y z/ syms xyz

Question 11

Which of the these is the way to access the first element in a vector named v (assuming there is at least one element in the vector)?

Answer 11

v(1)

Question 12

Which of the following is used to see of two elements are equal in MATLAB?

Answer 12

=

Question 13

If vector = [1 2 3 4; 11 24 92 100; 345 65 90 1]. What will the value of a be equal to if this code is entered into Matlab&raquo_space; [ a b ] = size (vector)?

Answer 13

1 2 3 4

Question 14

What is the value of ans that is printed when the following code is run: isnumeric(32)

Answer 14

1

Question 15

If I want to save a formatted string to memory, but don’t want to print it out, which command should I use?

Answer 15

sprintf

Question 16

When used in the fprintf, the %g is used as

Answer 16

Default number display

Question 17

When used in the fprintf command, the \n is used to

Answer 17

Add a line space (enter key)

Question 18

To display ‘Question 2’ in the command window, the correct command is

Answer 18

disp(‘Question 2’)

Question 19

The clc command is used to

Answer 19

Clear the command window

Question 20

The num2str command

Answer 20

Converts a number to string

Question 21

“The output of the last line is
aa=2
as=num2str(a2.
cat=[‘cat’ as]

Answer 21

cat1

Question 22

To join one or more strings into a single string is known as

Answer 22

Concatenation

Question 23

The output of cat=[‘cat’ ‘dog’] is

Answer 23

catdog

Question 24

Which functions help you to save and load variables?
Expl. There is a pre-defined function in MATLAB to store the variable values from your workspace permanently called “save filename”

Answer 24

> > save Lays a b
load (‘myfile.mat’)

Question 25

To display comments of M-file, we use ______

Answer 25

echo on

Question 26

Where do we need to store a function to call it in other programs?

Answer 26

The bin folder

Question 27

What are the difference between the ‘help’ and the ‘look for’ command?
Expl.
Help = command is used to return all the commands surrounding a particular toolbox name entered along with it.
Look for = command is used to return a particular function or set function or set of functions whose name matches with the keyword entered

Answer 27

Help returns the entire set while look for returns specific commands

Question 28

“What will the following set of commands do when they are present in a script file?
stem[y1, y2];
title(‘p’)
print -deps l

Answer 28

Store the graph as a separate file

Question 29

The function to close the windows containing graphs generated from MATLAB is

Answer 29

Close all

Question 30

What is not displayed by the workspace?

Answer 30

Time of variable generation

Question 31

MATLAB allows modelling of different control systems using ______

Answer 31

Simulink

Question 32

How to stop the execution of a chain of commands?

Answer 32

Press ctrl + c

Question 33

What are MEX files in MATLAB?

Answer 33

Allows the user to combine C source files with MATLAB files

Question 34

Explain what is MATLAB? Where MATLAB may be applicable?

Answer 34

MATLAB is a high-level programming language with an interactive surroundings for visualization, numerical computation and programming characteristic.

Question 35

What does MATLAB consist of?

Answer 35

MATLAB includes five fundamental parts

Matlab language
Matlab running environment
Handle graphics
Matlab function library
Matlab application program interface (API)

Question 36

To add a comment to the mfile, the Matlab command is

Answer 36

%