Free MATLAB MATLAB Environment and Syntax Questions and Answers

Question 1

Which of the following is an invalid variable name in MATLAB?

Accepted Answer

2start_variable

Answer

my_variable

Answer

variable123

Answer

_another_variable

Question 2

A user wants to remove all variables from the Workspace and clear the text from the Command Window. Which combination of commands achieves this?

Accepted Answer

clear; clc

Answer

clc; close all

Answer

clear all; close

Answer

remove all; clc

Question 3

In the MATLAB Desktop Environment, which window is primarily used for writing, editing, and saving multi-line scripts and functions that can be executed as a whole?

Accepted Answer

Editor

Answer

Workspace

Answer

Command History

Answer

Command Window

Question 4

A user executes the following code in a new MATLAB session:

x = 1:5;
y = x(end) + x(1);

What is the value of 'y' in the Workspace?

Accepted Answer

6

Answer

An error occurs

Answer

5

Answer

1

Question 5

How do you start a multi-line block comment in a MATLAB script?

Accepted Answer

%{

Answer

//

Answer

/*

Answer

%%

Question 6

A user defines a 3x3 matrix `A = magic(3);`. Which command will correctly extract the entire second row of this matrix?

Accepted Answer

A(2, :)

Answer

A(2)

Answer

A(:, 2)

Answer

A(row=2)