MATLAB Basic Introduction 4

Question 1

What symbol is used to start a comment in a MATLAB script?

Accepted Answer

%

Answer

The percent sign (%) starts a comment in MATLAB; everything after it on the same line is ignored.

Question 2

Which of the following creates a 3×3 identity matrix in MATLAB?

Accepted Answer

eye(3)

Answer

eye(n) creates an n×n identity matrix with ones on the diagonal and zeros elsewhere.

Question 3

What is the result of logical expression (3 > 2) in MATLAB?

Accepted Answer

Both 'true' and 1

Answer

MATLAB returns logical 1 for true comparisons; logical 1 and the string 'true' are equivalent representations.

Question 4

Which MATLAB function computes the square root of a number?

Accepted Answer

sqrt(x)

Answer

sqrt(x) is the dedicated MATLAB function for computing the square root of x.

Question 5

How does MATLAB index arrays — starting from 0 or 1?

Accepted Answer

1, unlike most languages

Answer

MATLAB arrays are 1-indexed, meaning the first element is at index 1, not 0.

MATLAB - MATLAB Technical Computing Practice Test