General MCQ Flashcards
7 cards from real MATLAB practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 General MCQ flashcards as text
Which MATLAB function returns the size of each dimension of an array?
Answer: size(A)
size(A) returns a row vector whose elements are the lengths of the corresponding dimensions of A.
What does the MATLAB expression A(end, :) return?
Answer: The last row of A
The keyword 'end' refers to the last index in a dimension, so A(end, :) selects the last row and all columns.
Which operator performs element-wise multiplication in MATLAB?
Answer: .*
The .* operator multiplies corresponding elements of two arrays, whereas * performs matrix multiplication.
What is the output of mod(10, 3) in MATLAB?
Answer: 1
mod(10, 3) returns 1, the remainder when 10 is divided by 3 (10 = 3×3 + 1).
Which MATLAB command is used to clear all variables from the workspace?
Answer: clear
The clear command removes all variables from the current workspace; clc only clears the Command Window text.
How do you create a column vector of values from 1 to 10 with step 2 in MATLAB?
Answer: (1:2:10)'
The expression (1:2:10)' creates the row vector [1 3 5 7 9] and transposes it into a column vector.
What function would you use to find the maximum value in each column of a matrix M?
Answer: max(M, [], 1)
max(M, [], 1) operates along dimension 1 (rows), returning the maximum of each column.