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MATLAB INTERVIEW QUESTIONS QUESTIONS & ANSWERS  LEARNING MODE


Matlab Interview Questions & Answers  Learning ModeMATLAB is a highperformance language for technical computing. It integrates computation, visualization, and programming in an easytouse environment where problems and solutions are expressed in familiar mathematical notation. Typical uses include: Math and computation. Algorithm development. MATLAB (matrix laboratory) is a multiparadigm numerical computing environment and fourthgeneration programming language. MATLAB is a highperformance language for technical computing, integrating computation, visualisation, and programming in an easytouse environment where problems and solutions are expressed in familiar mathematical notation. 

Try Matlab Interview Questions & Answers  Exam Mode  
Matlab Interview Questions & Answers  Learning Mode 
Try Matlab Interview Questions & Answers  Exam Mode 
Question: Explain The MATLAB mathematical function library?
Answer: This is a vast collection of computational algorithms ranging from elementary functions like sum, sine, cosine, and complex arithmetic, to more sophisticated functions like matrix inverse, matrix eigenvalues, Bessel functions, and fast Fourier transforms Source: CoolInterview.com 
Question: What can we use Matlab for?
Answer: Simple calculations 2. Plotting and analyzing mathematical relationships (2D and 3D) 3. List & Matrix Operations 4. Writing script files (a type of programming) 5. Symbolic manipulation of equations 6. Advanced visualization, animation and GUI interface tools Source: CoolInterview.com 
Question: Explain The MATLAB Application Program Interface (API)?
Answer: This is a library that allows you to write C and Fortran programs that interact with MATLAB. It include facilities for calling routines from MATLAB (dynamic linking), calling MATLAB as a computational engine, and for reading and writing MATfiles. Source: CoolInterview.com 
Question: Explain about stress analysis in Matlab?
Answer: People working on these areas as a aerospace engineers should have familiarity and exposure to NASTRAN and MATLAB with knowledge on space environment and modeling of flexible dynamics. These aerospace engineers will be responsible to conduct stress analysis on metallic and composite structures. NASTRAN, IDEAD, Oracle and PATRAN proficiency level is required. Their duties also include on aircraft which are metallic and composite structures. This includes and understanding of control surface stiff Source: CoolInterview.com 
Question: What can we use Matlab for?
Answer: Simple calculations 2. Plotting and analyzing mathematical relationships (2D and 3D) 3. List & Matrix Operations 4. Writing script files (a type of programming) 5. Symbolic manipulation of equations 6. Advanced visualization, animation and GUI interface tools Source: CoolInterview.com 
Question: Why does MATLAB only calculate to 4 significant digits?
Answer: It doesn't. It uses full doubleprecision floating point numbers to calculate everything. By default it only prints a few decimal places to the screen. You can change this using the command format long. Type help format for more information. Source: CoolInterview.com 
Question: What are the MATLAB System Parts?
Answer: The MATLAB system consists of five main parts: * The MATLAB language. * The MATLAB working environment. * Handle Graphics. * The MATLAB mathematical function library. * The MATLAB Application Program Interface (API). Source: CoolInterview.com 
Question: How to correctly apply the graphics patches in Matlab?
Answer: Open a LOCAL MACHINE window and type: xhost +ashland # Add the following code sequence just before the plot command that was giving you problems: figure; set(gcf,'renderer','zbuffer'); [s,w] = unix('echo $DISPLAY'); set(gcf,'XDisplay',w); Source: CoolInterview.com 
Question: Explain about stress analysis?
Answer: People working on these areas as a aerospace engineers should have familiarity and exposure to NASTRAN and MATLAB with knowledge on space environment and modeling of flexible dynamics. These aerospace engineers will be responsible to conduct stress analysis on metallic and composite structures. NASTRAN, IDEAD, Oracle and PATRAN proficiency level is required. Their duties also include on aircraft which are metallic and composite structures. This includes and understanding of control surface stiff Source: CoolInterview.com 
Question: how to Add noise to an image in Matlab?
Answer: The function noise.m, now installed on ashland too, adds Gaussian, uniform, salt and pepper, additive or multiplicative noise to an image. Source: CoolInterview.com 
Question: How can I make MATLAB use the full window width for displaying matrices? Answer: In R12 (MATLAB 6.0), this can be controlled via a preference. Select the File  Preferences... menu item, and select Command Window in the Preferences dialog that appears. In the Display section, there's a checkbox labeled Limit matrix display width to eighty columns. Unchecking that box allows matrix displays to make full use of the Command Window's width. [Unchecked is the default.] Starting with MATLAB R12.1, users can access the current command window s Source: CoolInterview.com 
Question: What is the FAQ editorial policy?
Answer: What is the FAQ editorial policy? This FAQ is actively maintained as a wiki document on MATLAB Central. Currently the MATLAB Central File Review Team has accounts that allow them to edit the FAQ. Even though the FAQ is hosted at MATLAB Central, content is supplied and maintained by the user community of the comp.softsys.matlab newsgroup. For official MATLAB tech support, see instead the MATLAB support area (http://www.mathworks.com/support/). Source: CoolInterview.com 
Question: Explain LaTeX in Matlab?
Answer: Matlab already handles naturally simple LaTeX encodings that allow introducing Greek lettters or modifying the font size and appearance in plots. Source: CoolInterview.com 
Question: Can we run Matlab without graphics?
Answer: Sometimes you may want to run scripts which contain plotting commands without displaying the plots and without going into the script to comment out the commands. An example: if you're working from home and it's too slow to run graphics over the network. You can play a simple UNIX trick: % setenv DISPLAY /dev/null % matlab Source: CoolInterview.com 
Question: LaTeX in Matlab
Answer: Matlab already handles naturally simple LaTeX encodings that allow introducing Greek lettters or modifying the font size and appearance in plots. Source: CoolInterview.com 
Question: how to Add noise to an image?
Answer: The function noise.m, now installed on ashland too, adds Gaussian, uniform, salt and pepper, additive or multiplicative noise to an image. Source: CoolInterview.com 
Question: Can MATLAB pass by reference?
Answer: This is really two questions in one. One is "Can I modify a function's input argument?" This would save memory and simplify programming in some cases. The answer here is "NO". If you modify the input argument of a function, all you do is modify a copy of the argument local to the function. The only way to modify variables from a function is to return the result when finished, as in bigstruct = addelement(bigstruct, 5); The other question is: "Pass by val Source: CoolInterview.com 
Question: can we run Matlab without graphics?
Answer: Sometimes you may want to run scripts which contain plotting commands without displaying the plots and without going into the script to comment out the commands. An example: if you're working from home and it's too slow to run graphics over the network. You can play a simple UNIX trick: % setenv DISPLAY /dev/null % matlab Source: CoolInterview.com 
Question: Explain The MATLAB working environment?
Answer: This is the set of tools and facilities that you work with as the MATLAB user or programmer. It includes facilities for managing the variables in your workspace and importing and exporting data. It also includes tools for developing, managing, debugging, and profiling Mfiles, MATLAB's applications. Source: CoolInterview.com 
Question: How to modify the MATLAB path? Answer: Easiest solution: use the PATHTOOL GUI. Or if you want command line access: Suggested by Joshua Stiff: You can use addpath to add directories from the command line, and path2rc to write the current path back to `pathdef.m'. If you do not have write permissions for `pathdef.m', path2rc can write to a different file, which you can execute from your `startup.m'. Source: CoolInterview.com 
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