MATLAB Environment and Syntax 4

Question 1

Which MATLAB environment panel lets you navigate the file system and open files without typing full paths?

Accepted Answer

Current Folder browser

Answer

The Current Folder browser provides a GUI file explorer that lets you browse directories and double-click files to open them.

Question 2

What does `isa(x, 'double')` return if `x` is a single-precision array?

Accepted Answer

false (0)

Answer

`isa()` returns logical 1 only when the object belongs to exactly the specified class; `single` does not match `'double'`.

Question 3

In the MATLAB Editor, what does Ctrl+Enter do (when the cursor is inside a Code Section)?

Accepted Answer

Runs only the current section (cell)

Answer

Ctrl+Enter executes the code section (cell) delimited by `%%` markers where the cursor is currently located.

Question 4

What symbol creates a Code Section (cell) boundary in a MATLAB script?

Accepted Answer

%% (double percent)

Answer

Two consecutive percent signs `%%` at the start of a line define a section boundary in the MATLAB Editor.

Question 5

What does `eps` represent in MATLAB?

Accepted Answer

Machine epsilon — the smallest difference between two double values

Answer

`eps` is the machine epsilon for double precision, approximately 2.22e-16, representing floating-point relative precision.

MATLAB - MATLAB Technical Computing Practice Test