MATLAB Script and Function Creation Questions and Answers

Question 1

What is the fundamental difference in how MATLAB scripts and functions interact with the workspace?

Accepted Answer

Scripts operate in the base (or caller's) workspace, while functions have their own private, local workspace.

Answer

Scripts create a temporary workspace, while functions use the global workspace.

Answer

Both scripts and functions operate in their own private workspaces, isolated from the base workspace.

Answer

Functions can modify base workspace variables directly without using 'global', but scripts cannot.

Question 2

A programmer creates a function that needs to accept a variable number of input arguments. Which keyword should be used in the function definition to handle this?

Accepted Answer

varargin

Answer

nargin

Answer

inputs{}

Answer

arguments

Question 3

Which of the following correctly defines an anonymous function to calculate the square of a number and assigns it to a function handle named 'sqr'?

Accepted Answer

sqr = @(x) x.^2;

Answer

function sqr(x) = x.^2;

Answer

sqr = function(x) x.^2;

Answer

anon_function sqr = (x) -> x.^2;

Question 4

A user has a primary function `mainAnalysis.m`. They want to create a helper function that is only callable by `mainAnalysis` and other functions within the same file. How should this helper function be created?

Accepted Answer

By defining it within the `mainAnalysis.m` file after the `mainAnalysis` function has ended.

Answer

By placing it in a separate M-file named `helper.m` in the same folder.

Answer

By declaring it with the `private` keyword inside `mainAnalysis.m`.

Answer

By creating a `private` subfolder and placing the helper function's M-file inside it.

Question 5

A developer needs to create a function that computes both the sum and the product of two input numbers, `a` and `b`. Which function definition syntax is correct for returning both results?

Accepted Answer

function [sum_val, prod_val] = my_calc(a, b)

Answer

function (sum_val, prod_val) = my_calc(a, b)

Answer

function my_calc(a, b) returns [sum_val, prod_val]

Answer

function my_calc(a, b, sum_val, prod_val)

Question 6

What is a primary limitation of an anonymous function in MATLAB?

Accepted Answer

It can only contain a single executable statement.

Answer

It cannot accept any input arguments.

Answer

It must be saved in its own M-file.

Answer

It cannot use built-in MATLAB functions in its expression.