MATLAB General MCQ 2

Question 1

Which MATLAB function returns the size of each dimension of an array?

Accepted Answer

size(A)

Answer

size(A) returns a row vector whose elements are the lengths of the corresponding dimensions of A.

Question 2

What does the MATLAB expression A(end, :) return?

Accepted Answer

The last row of A

Answer

The keyword 'end' refers to the last index in a dimension, so A(end, :) selects the last row and all columns.

Question 3

Which operator performs element-wise multiplication in MATLAB?

Accepted Answer

.*

Answer

The .* operator multiplies corresponding elements of two arrays, whereas * performs matrix multiplication.

Question 4

What is the output of mod(10, 3) in MATLAB?

Accepted Answer

1

Answer

mod(10, 3) returns 1, the remainder when 10 is divided by 3 (10 = 3×3 + 1).

Question 5

Which MATLAB command is used to clear all variables from the workspace?

Accepted Answer

clear

Answer

The clear command removes all variables from the current workspace; clc only clears the Command Window text.

MATLAB - MATLAB Technical Computing Practice Test