# MATLAB Online Quiz

Welcome to our MATLAB Online Quiz designed to test and enhance your MATLAB skills. MATLAB, short for Matrix Laboratory, is a high-level programming and numerical computing environment widely used by engineers and scientists. This quiz covers a range of topics from basic syntax and matrix operations to more complex topics such as data visualization and algorithm development. Whether you're a student, a researcher, or a professional engineer, these questions will challenge your understanding and help deepen your proficiency in MATLAB.

## 1. What is MATLAB primarily used for?

a) Web development
c) Numerical computing
d) Network testing

## 2. How do you create a row vector in MATLAB?

``````A = [1 2 3 4];
``````
a) A = [1 2 3 4];
b) A = {1, 2, 3, 4};
c) A = (1, 2, 3, 4);
d) A = <1, 2, 3, 4>;

## 3. What does the following MATLAB code output?

``````x = 10;
y = 20;
disp(x + y);
``````
a) 30
b) x+y
c) 10 20
d) Error

## 4. How do you create a 2x2 matrix in MATLAB?

a) matrix = 1:4;
b) matrix = [1, 2; 3, 4];
c) matrix = [[1 2] [3 4]];
d) matrix = {1, 2; 3, 4};

## 5. What is the output of the following MATLAB code?

``````A = [1 2; 3 4];
B = A';
disp(B);
``````
a) [1 2; 3 4]
b) [1 3; 2 4]
c) [4 3; 2 1]
d) [2 4; 1 3]

a) A(1, 2)
b) A(2, 1)
c) A[2][1]
d) A{2, 1}

## 7. What is the purpose of the function keyword in MATLAB?

a) To create a user-defined function
b) To execute built-in functions faster
c) To initialize variables
d) To import external files

## 8. What will the following MATLAB code output?

``````x = linspace(0,10,5);
disp(x);
``````
a) 0 2.5 5 7.5 10
b) [0 2.5 5 7.5 10]
c) 0:10
d) Error

## 9. How do you plot a function in MATLAB?

``````x = 0:0.1:2*pi;
y = sin(x);
plot(x, y);
``````
a) plot(x = 0:0.1:2*pi, y = sin(x));
b) graph(x, y);
c) plot(x, y);
d) draw(x, y);

## 10. What does the %% symbol define in a MATLAB script?

a) It starts a new section in the script.
b) It comments out a line of code.
c) It indicates a logical AND operation.
d) It performs a modulo operation.

a) clearvars
b) clear all
c) reset
d) wipe

a) max()
b) min()
c) find()
d) large()

## 13. How do you generate random numbers in MATLAB?

``````rand(1,5)
``````
a) rand(1,5)
b) random(1:5)
c) generate(1,5)
d) randnum(1,5)

## 14. What is the output of the following MATLAB code?

``````fprintf('The value of pi is approximately %.2f.\n', pi);
``````
a) The value of pi is approximately 3.14.
b) The value of pi is approximately pi.
c) The value of pi is approximately 3.
d) Error

a) inverse(A)
b) A^-1
c) inv(A)
d) 1/A

## 16. What does the 'end' keyword do in MATLAB?

a) Terminates a statement
b) Ends a loop or a function
c) Closes a program
d) Stops script execution

## 17. How can you concatenate two strings in MATLAB?

``````str1 = 'Hello, ';
str2 = 'world!';
result = [str1 str2];
``````
a) + (str1 + str2)
b) append(str1, str2)
c) [str1 str2]
d) strcat(str1, str2)

a) save
b) store
c) keep
d) hold

## 19. How do you increase the line width of a plot in MATLAB?

``````plot(x, y, 'LineWidth', 2);
``````
a) setLineWidth(2)
b) plot(x, y, 'LineWidth', 2);
c) lineWidth = 2;
d) plot(x, y, 2);

## 20. What is the MATLAB command to find the determinant of a matrix?

a) det(A)
b) determinant(A)
c) solve(A)
d) detmatrix(A)