06th
Jun

# Matlab MCQ

• 06th Jun, 2022
• 649 Followers

## Matlab MCQ Quiz

Following are mostly asked Matlab MCQ test that are designed for professionals like you to crack you interviews. You can take this Matlab online test before appearing to you real interview. This Matlab quiz there are around 30+ multiple choice questions on Matlab with four options.

### 1) What is matlab?

• A. Programming platform
• B. Operating System
• C. Mobile Os
• D. First Computer

### 2) Which is the invalid variable name in matlab?

• A. x6
• B. n_factorial
• C. 6x
• D. lastValue

• A. who
• B. which
• C. Type
• D. PWD

• A. Yes
• B. No

• A. pi
• B. inf
• C. i
• D. gravity

### 6) In Matlab, (.*) is used for ___.

• A. multiplying two Arrays
• C. Both A and B
• D. None of the above

### 7) What is the use of abs function in Matlab?

• A. returns the square root of number.
• B. returns magnitude of a number.
• C. returns power of number
• D. None of these

### 8) Matlab command clear x y is used for?

• A. for clearing only variables x and y
• B. for clearing only variables x, y and z
• C. for clearing all variables
• D. None of the above

• A. use of / symbol
• B. use of * symbol
• C. use of \$ symbol
• D. use of % symbol

### 10) Which of the following calculations in Matlab would return the value 1?

• A. 2/2*1
• B. 1+4/5
• C. 3^2/3*3
• D. None of the above

### 11) What symbol precedes all comments in Matlab?

• A. %
• B. \$
• C. @
• D. None of the above

### 12) Matlab stands for __.

• A. Matrix laboratory
• B. Matrix line
• C. Multi laboratory
• D. None of the above

### 13) Index of an Array in Matlab starts with __.

• A. One
• B. zero
• C. Both A and B
• D. All of the above

### 14) What is the return type of angles function in Matlab?

• A. Degrees
• D. Depends on the argument

### 15) What will be the output of atan2(-1 1) in Matlab?

• A. -Ï€/4
• B. -2Ï€/4
• C. -Ï€/2
• D. All of the above

### 16) Which class in Matlab is used to store the complex number?

• A. Complex
• B. Double
• C. Character
• D. None of the above

• A. !=
• B. ==
• C. isequal
• D. =

### 18) Which command in Matlab gives list of user-created variables with dimensions?

• A. who -file filename
• B. who global
• C. who
• D. None of the above

### 19) Which data type is not available in Matlab?

• A. ilaplace
• B. int16
• C. int32
• D. All of the above

### 20) What does the command clc do in Matlab?

• A. Clear all text from the Command Window.
• B. Shows all text on the Command Window.
• C. Both A and B
• D. None of the above

### 21) Which function is used to displays the value of the variable in Matlab?

• A. disp(var_name)
• B. dis(var_name)
• C. abs(var_name)
• D. None of the above

• A. Yes
• B. No

### 23) MATLAB stands for

• A. Mat laboratory
• B. Maths laboratory
• C. Matrix laboratory
• D. None of these

### 24) The command to delete the 3rd column of matrix A is

• A. A(:,3)=0
• B. A(:,3)=[ ]
• C. A(3,:)=[ ]
• D. None of the above

• A. 2*2
• B. 2^2
• C. 2+2
• D. 2/2

• A. Array
• B. Vector
• C. Matrix
• D. Scalar

• A. 216
• B. 81
• C. 36
• D. 6

• A. aâ€™
• B. a_4
• C. a^3
• D. a.*b

### 29) Satvik wish to get the scalar value of the number of the element in the vector . What should he prefer ?

• A. length()
• B. size()
• C. Anyone of size() or length()
• D. Don't know

### 30) The ' operator in Matlab is used to get

• A. Complement of the Vector
• B. Transpose of the Vector
• C. Find min of the vector
• D. Find max of the vector

### 31) What does 'b" represent in y=mx=b

• A. y-intercept
• B. macaroni
• C. slope
• D. nothing

## Matlab Online Test Questions (Matlab FAQs)

### 1) What is matlab?

MATLAB is a mostly used programming platform that provides a range of applications based on computational mathematics. It is used in analyzing data, developing algorithms, and creating models.

### 2) What are the features of matlab?

The features of MATLAB are:

• High-Level Language
• Interactive Environment
• Handling Graphics
• Mathematical Functions Library
• Application Program Interface (API)
• Accessing Data
• Interfacing with Other Languages

### 3) Can we have multiple 3d plots in matlab?

Yes, we can have multiple 3d plots in Matlab.

### 4) What is the use of abs function in matlab?

abs() function is used to return absolute value in MATLAB. It can be represented as: Y = abs(X).

### 5) What is Get and Set in MATLAB?

get() function is used to return all the default values currently defined in an array whose field names are the object property names and whose field values are the corresponding property values.

set() function is used to specify multiple property values in a structured array whose field names are the object property names and whose field values are the corresponding property values.

### 6) What is difference between MIL and SIL?

MIL stands for Model In the Loop, in this, the whole system is modeled in order to verify and test the accuracy and acceptability of the application before prototype manufacturing.

SIL stands for Software In the Loop, it is basically used to test and validate the integration of source code into a mathematical model simulation.

### 7) How polynomials can be represented in MatLab?

Polynomials can be represented in MatLab by putting the value of coefficients in the array in descending order. For example 2x3 − 6x2 − 7x + 25 is represented as [2, -6, -7, 25].

### 8) How to open SIMULINK in MATLAB ?

We can open SIMULINK in MATLAB by performing the following steps:

• On the MATLAB toolstrip, on the Home tab, click Simulink.
• On the Simulink Start Page, select a recent model or project from the list, or click Open.
• In the Simulink Toolstrip, on the Simulation tab, select Open and click Recent Files to open recent files or Open to search for a model.

### 9) What are MEX files in MATLAB?

A MEX file is a function, created in MATLAB used to call a C/C++ program or a Fortran subroutine. A MEX function behaves just like a MATLAB script or function. To call a MEX function, we can use the name of the MEX file, without the file extension.

### 10) What is MatLab API?

MatLab API is a type of library that provides a way for running applications outside MATLAB used for reading and writing the important Mat files and calling Matlab as the computational engine.

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