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
In MATLAB, what does the function strcmp(s1, s2) return?
Answer: 1 if strings are equal, 0 otherwise
strcmp returns logical 1 (true) if s1 and s2 are identical, and logical 0 (false) otherwise.
Which MATLAB function converts a numeric value to a string?
Answer: num2str
num2str converts a numeric array to a character array (string), with optional format control.
What does the MATLAB function isempty(A) return when A = []?
Answer: 1
isempty returns 1 (true) when the array has any dimension of size zero, such as an empty matrix [].
Which statement correctly defines an anonymous function for f(x) = x^2 + 1 in MATLAB?
Answer: f = @(x) x^2 + 1
Anonymous functions in MATLAB are created with the @ operator followed by the argument list and expression.
What is the result of logical expression (3 > 2) & (5 < 4) in MATLAB?
Answer: 0
The & operator is element-wise AND; (3>2) is true and (5<4) is false, so true & false = 0.
Which MATLAB function computes the eigenvalues and eigenvectors of a square matrix?
Answer: eig(A)
eig(A) returns the eigenvalues of A, and [V,D] = eig(A) returns eigenvectors V and diagonal eigenvalue matrix D.
What does the MATLAB command 'whos' display?
Answer: A list of current workspace variables with size, bytes, and class
whos lists all variables in the current workspace along with their size, bytes, and data class.