MATLAB Environment and Syntax 2

Question 1

What does the `whos` command display that `who` does not?

Accepted Answer

Variable names, sizes, bytes, and class

Answer

`whos` provides detailed information including size, bytes allocated, and data class for each variable, while `who` lists names only.

Question 2

In MATLAB, what is the result of entering `3 == 3` at the command line?

Accepted Answer

1

Answer

MATLAB's equality operator returns a logical 1 (true) or 0 (false), and the result is displayed as the integer 1.

Question 3

Which keyboard shortcut recalls the previous command in the MATLAB Command Window?

Accepted Answer

Up arrow key

Answer

Pressing the Up arrow key cycles through command history in the MATLAB Command Window.

Question 4

What happens when you type `clear all` in MATLAB?

Accepted Answer

Removes all variables from the workspace

Answer

`clear all` removes all variables, globals, functions, and MEX links from the workspace memory.

Question 5

How do you suppress output for a statement in MATLAB?

Accepted Answer

End the line with a semicolon (;)

Answer

A semicolon at the end of a statement prevents MATLAB from displaying the result in the Command Window.

MATLAB - MATLAB Technical Computing Practice Test