MATLAB Interview Questions and Answers
Freshers / Beginner level questions & answers
Ques 1. What is MATLAB?
MATLAB, short for Matrix Laboratory, is a high-performance programming language and environment primarily used for numerical computing, data analysis, and visualization.
Example:
disp('Hello, MATLAB!');
Ques 2. How do you load data from a CSV file in MATLAB?
You can use the 'csvread' or 'readmatrix' function to load data from a CSV file in MATLAB.
Example:
data = csvread('filename.csv');
Ques 3. Explain the use of the 'plot' function in MATLAB.
The 'plot' function in MATLAB is used to create 2D line plots. It is commonly used to visualize data and relationships between variables.
Example:
x = linspace(0, 2*pi, 100);
y = sin(x);
plot(x, y);
Ques 4. What is the purpose of the 'imshow' function in MATLAB?
'imshow' is used to display images in MATLAB. It is commonly employed for image processing tasks and analysis.
Example:
img = imread('image.jpg');
imshow(img);
Ques 5. Explain the concept of a MATLAB workspace.
The MATLAB workspace is the set of variables currently in memory. It includes all the variables created during the current session.
Example:
a = 5;
b = [1, 2, 3];
Ques 6. How do you create a matrix in MATLAB?
You can create a matrix in MATLAB using square brackets or the 'zeros', 'ones', or 'eye' functions.
Example:
A = [1, 2, 3; 4, 5, 6; 7, 8, 9];
Ques 7. Explain the purpose of the 'for' loop in MATLAB.
The 'for' loop is used for repetitive execution of a block of code. It iterates over a range of values or elements in an array.
Example:
for i = 1:5
disp(i);
end
Ques 8. What is the difference between '==', '>', and '<' operators in MATLAB?
'==' checks for equality, '>' checks for greater than, and '<' checks for less than.
Example:
a = 5;
b = 10;
result = (a < b);
Ques 9. Explain the purpose of the 'rand' function in MATLAB.
'rand' generates random numbers from a uniform distribution between 0 and 1.
Example:
randomNumber = rand();
Ques 10. How do you perform element-wise multiplication in MATLAB?
Element-wise multiplication is done using the '.*' operator.
Example:
A = [1, 2, 3];
B = [4, 5, 6];
result = A .* B;
Ques 11. How do you find the maximum element in a matrix in MATLAB?
The 'max' function can be used to find the maximum element in a matrix, either globally or along a specific dimension.
Example:
A = [1, 4, 3; 2, 7, 5];
maxValue = max(A, [], 'all');
Ques 12. How do you concatenate strings in MATLAB?
Strings can be concatenated using square brackets or the 'strcat' function.
Example:
str1 = 'Hello';
str2 = 'MATLAB';
result = [str1, ' ', str2];
Ques 13. Explain the use of the 'unique' function in MATLAB.
'unique' is used to find the unique elements in an array, and it can also return indices to reconstruct the original array.
Example:
A = [1, 2, 2, 3, 4, 4, 5];
uniqueValues = unique(A);
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