MATLAB Programming and Scripting 2

Question 1

What does the 'nargin' function return inside a MATLAB function?

Accepted Answer

Number of input arguments provided by the caller

Answer

'nargin' returns the number of input arguments actually passed by the caller at runtime.

Question 2

Which MATLAB construct is used to handle errors gracefully without stopping execution?

Accepted Answer

try-catch block

Answer

A try-catch block catches runtime errors and lets execution continue in the catch branch.

Question 3

In MATLAB, what is the result of evaluating 'mod(7, 3)'?

Accepted Answer

1

Answer

mod(7,3) returns 1 because 7 = 2*3 + 1.

Question 4

How do you define a nested function in MATLAB?

Accepted Answer

Place a function inside another function's body before its 'end' keyword

Answer

Nested functions are defined inside another function's body and must use explicit 'end' statements.

Question 5

What does the 'persistent' keyword do when used inside a MATLAB function?

Accepted Answer

Retains the variable's value between function calls

Answer

A persistent variable retains its value across multiple calls to the same function, similar to a static variable in C.

MATLAB - MATLAB Technical Computing Practice Test