Top 10 MATLAB Interview Questions and Answers

MathWorks created MATLAB, a programming language and environment for numerical computing. It enables the implementation of algorithms, the graphing of functions, the manipulation of matrices, the interfacing with programs written in other languages, such as C, C++, and Fortran, and the development of user interfaces. The average salary for a MATLAB programmer in India is around ₹30,000 monthly. 

Learning MATLAB will enable you to work on architecture modeling, analytical environment, and model-based design. To improve your preparation and ace your forthcoming interviews, we've compiled the most often-asked interview questions on MATLAB Simulink with their responses.

Top 10 MATLAB Coding Interview Questions for Interviewees

 

1) What is a neural network, and how to implement one in MATLAB?

An adaptable neural network learns by connecting nodes or neurons in a layered structure that resembles the human brain. A neural network may be trained to identify patterns, classify data, and predict future occurrences since it can learn from data.

It abstracts the input's input into layers. Like the human brain, it can be trained to identify patterns in voice or images by providing many instances. Its behavior is determined by the connections between its parts and by the weights or strengths of those connections. To create a neural network, first, we need to collect data and configure them. After configuring, they must be trained. In the final step, we need to validate its functionality and performance before implementing it on real-world systems. 

2) How does MATLAB build a GUI?

• Enter the guide at the MATLAB prompt to launch GUIDE.
• Select the Blank GUI (Default) template in the GUIDE Quick Start dialogue box, then click OK.

The component palette should show the component names:

• Now, navigate to File > Preferences > GUIDE.
• In the component palette, click Show names.
• Select OK.

Hence, we can design a GUI in MATLAB by following the instructions above.

3) How can Simulink be used in MATLAB?

To represent a process, such as the simplified motion of an automobile or any control system process, Simulink is utilised. When you mix MATLAB with Simulink, you may build your system in a simulation environment while combining textual and graphical programming. 

In MATLAB, you can access Simulink directly from the Home tab. Simulink is a graphical block diagramming tool with a set of block libraries that may be customised. It launches using the Library Browser when it is opened. Building simulation models requires the usage of the Library Browser.

By choosing the necessary elements from the Library Browser and dragging them into the Model window, model elements can be added. The model elements can also be copied and pasted into the model window as an alternative. We can select any model based on our preference for creating any project here.

4) How can I connect an Arduino to MATLAB?

To get this right, we must execute a few steps:

Step 1: Launch MATLAB, then select Add-Ons from the drop-down menu. Then select Get Hardware Support Packages from the drop-down menu. The window for installing packages will open.

Step 2: Click Next after selecting Install from the Internet.

Step 3: You may view the MATLAB and Simulink packages in the following window. Select the Arduino package to continue the installation and check all the other listed packages.

Step 4: The installer will prompt you to sign in to your MathWorks account. You can create an account during installation if you still need to create one. Continue downloading the packages after accepting the license agreement on the following screen. You must now wait while MATLAB downloads and installs all necessary components.

5) Give an idea about SVM and when to use it in MATLAB.

A support vector machine (SVM) is a supervised learning technique used for various classification and regression issues, including medical signal processing, natural language processing, speech and picture recognition, and signal processing in the context of signal processing. The SVM algorithm's principal objective is to as effectively segregate data points from one class from another class as possible.

A portion of the training observations that pinpoint the location of the separating hyperplane is referred to as support vectors. Multiclass problems are often broken down into binary problems, and the basic SVM algorithm is designed for binary classification problems. When your data contains precisely two classifications, you can employ a support vector machine (SVM).

6) What is the purpose of allocating the working environment on MATLAB?

The working environment for MATLAB includes a variety of tools. It has tools for controlling variables. MATLAB supports the export and import of data between applications. 

To create and maintain MATLAB files, specific tools are available. MATLAB offers greater flexibility for profiling and debugging. We can enter our codes in the space located between the functions and command history boxes.

7) Briefly describe how MATLAB handles graphics.

MATLAB has a special subsystem for handling and managing graphics. To view 2D and 3D data,  high-level commands are required. The Handle Graphics can create presentation graphics, animations, and image processing. 

Using low-level commands, the graphics can be altered in appearance. Moreover, Customized Graphics User Interfaces can be created with Handle Graphics.

8) What exactly does an "M-file” mean?

A text file utilized by MATLAB is called an M file. The MATLAB language can store a script, class, or specific function. 

M files are employed for running algorithms, creating graphs, and carrying out other mathematical processes. It is MATLAB's most basic file format. The m file has the.m extension. An m-file is any file with the .m extension.

9) Describe the P-code.

Using P-code, you may secure your source code so that others cannot access it or any of your projects. A MATLAB file's default extension is .m, whereas a p-code applied file's extension is .p. 

The way a P-code file operates is identical to how MATLAB does it. A file is not encrypted when MATLAB obfuscates it.

10) What does MATLAB's Stress Analysis entail?

A computational technique called stress analysis or finite element analysis can be used to forecast how any object will respond to external forces, heat, vibrations, etc. 

We are well recognized that MATLAB is a multidimensional program with applications across many engineering disciplines; for instance, mechanical engineering uses stress analysis to create automobiles and other things.

These were a few MATLAB Simulink interview questions that must be answered. However, we will try to cover many other crucial interview questions on MATLAB in our upcoming posts. So, do keep a tab on our website’s blog section. 

Conclusion

We hope these MATLAB interview questions have improved your comprehension of fundamental ideas and helped you prepare for the interview. 

Consider taking up Skill-Lync’s online courses for additional knowledge on different subjects. Our PG program will enhance your technical skills and boost your confidence to attend interviews. Our placement support team is dedicated to training you with mock interviews and will help you to carve a resume.