Free Basic MATLAB Introduction Questions and Answers

Question 1

What is the typical data type in MATLAB for numeric value(s)?

Accepted Answer

Double

Answer

In MATLAB, the default numeric data type for all numbers, whether integers or floating-point, is `double` (double-precision floating-point). This provides high precision and a wide range for numerical computations. While other types exist, `double` is the standard for general numeric values.

Question 2

If Arr = [9 3 5 7 10 0 16], how big is an array?

Accepted Answer

1x7

Answer

In MATLAB, an array's size is typically represented as `rows x columns`. The given array `Arr = [9 3 5 7 10 0 16]` is a single row containing seven elements. Therefore, its size is 1 row by 7 columns, denoted as `1x7`.

Question 3

What MATLAB command should be used to make y = 3(x+2) when x = 2?

Accepted Answer

">> x = 2;
>> y = 3*(x+2);"

Answer

To calculate `y = 3(x+2)` when `x = 2` in MATLAB, you must first define the variable `x` before using it in the expression for `y`. Additionally, MATLAB requires an explicit multiplication operator (`*`) between `3` and `(x+2)`. The correct sequence is to assign `x = 2` and then calculate `y = 3*(x+2)`.

Question 4

All variable names must only contain letters, digits, and underscores ( ).

Accepted Answer

TRUE

Answer

MATLAB variable names must start with a letter and can contain letters, digits, and underscores. They are case-sensitive. Special characters like hyphens, spaces, or other symbols are not allowed, ensuring clear and unambiguous variable identification.

Question 5

What command in the workspace browser clears all variables?

Accepted Answer

Clear

Answer

The `clear` command in MATLAB is used to remove variables from the workspace. When used without any arguments (e.g., `clear`), it clears all variables, freeing up memory and resetting the workspace. Other commands like `clc` clear the command window, and `clf` clears the current figure window.

MATLAB - MATLAB Technical Computing Practice Test

MATLAB - MATLAB Technical Computing Practice Test

Free Basic MATLAB Introduction Questions and Answers