MATLAB Functions and Flow Control 5

Question 1

What is a recursive function in MATLAB?

Accepted Answer

A function that calls itself

Answer

A recursive function calls itself within its own body, typically with a simpler input, until a base case is reached.

Question 2

Which of the following correctly implements factorial recursively in MATLAB?

Accepted Answer

function n = fact(n); if n>1; n = n * fact(n-1); end; end

Answer

The correct recursive factorial checks for the base case (n<=1 returns 1) and multiplies n by fact(n-1).

Question 3

What is a local function in MATLAB?

Accepted Answer

A helper function defined after the main function in the same .m file

Answer

Local functions are additional functions defined at the bottom of a script or function file and are only accessible within that file.

Question 4

Which MATLAB statement evaluates a block of code only if all previous `elseif` and `if` conditions were false?

Accepted Answer

else

Answer

The `else` clause runs when no preceding `if` or `elseif` condition evaluated to true.

Question 5

What is `cellfun` used for in MATLAB?

Accepted Answer

Apply a function to each element of a cell array

Answer

`cellfun(func, C)` applies the function `func` to each element of cell array `C` and returns the results.

MATLAB - MATLAB Technical Computing Practice Test