MATLAB General MCQ 4

Question 1

What is the MATLAB syntax to access elements in a struct field named 'age' of variable 'person'?

Accepted Answer

person.age

Answer

MATLAB uses dot notation to access struct fields, so person.age retrieves the 'age' field of the struct 'person'.

Question 2

Which MATLAB function is used to solve a system of linear equations Ax = b?

Accepted Answer

A \ b

Answer

The backslash operator A\b computes the solution to the linear system Ax=b efficiently without explicitly computing the inverse.

Question 3

What does the function cell2mat do in MATLAB?

Accepted Answer

Converts a cell array of matrices into a single matrix

Answer

cell2mat concatenates the contents of a cell array of numeric arrays into a single numeric matrix.

Question 4

In MATLAB, which loop type checks the condition AFTER executing the loop body at least once?

Accepted Answer

MATLAB has no such loop

Answer

MATLAB does not have a built-in do-while loop; both for and while loops check their conditions before each iteration.

Question 5

What is the purpose of the 'nargin' variable inside a MATLAB function?

Accepted Answer

Number of input arguments passed to the function

Answer

nargin returns the number of input arguments provided by the caller, allowing functions to handle optional inputs.

MATLAB - MATLAB Technical Computing Practice Test