(MATLAB MCQs Aeronautical Engineering

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What does MATLAB stand for?

a) Matrix Laboratory
b) Mathematical Laboratory
c) Matrix Language
d) Mathematical Language
Answer: a) Matrix Laboratory

Which MATLAB function is used to create a 2D plot?

a) plot2()
b) scatter()
c) plot()
d) graph()
Answer: c) plot()

How can you create a matrix in MATLAB?

a) Using matrix()
b) Using array()
c) Using square brackets []
d) Using createMatrix()
Answer: c) Using square brackets []

Which command is used to calculate the determinant of a matrix in MATLAB?

a) determinant()
b) det()
c) matrixdet()
d) finddet()
Answer: b) det()

What is the purpose of the subplot() function in MATLAB?

a) To create multiple figures
b) To plot multiple graphs in a single figure
c) To sub-divide a matrix
d) To save a figure
Answer: b) To plot multiple graphs in a single figure

Which function is used to solve a system of linear equations in MATLAB?

a) solve()
b) linsolve()
c) inv()
d) mldivide
Answer: d) mldivide

How do you access the element in the 2nd row and 3rd column of a matrix A?

a) A(2, 3)
b) A(3, 2)
c) A[2, 3]
d) A{2, 3}
Answer: a) A(2, 3)

Which MATLAB function would you use to compute the eigenvalues of a matrix?

a) eig()
b) eigen()
c) values()
d) eigenvalues()
Answer: a) eig()

What is the result of the MATLAB expression 2^3?

a) 6
b) 8
c) 9
d) 16
Answer: b) 8

How can you generate a row vector of 10 evenly spaced values between 1 and 5 in MATLAB?

a) linspace(1, 5, 10)
b) range(1, 5, 10)
c) space(1, 5, 10)
d) evenly(1, 5, 10)
Answer: a) linspace(1, 5, 10)

Which MATLAB command is used to create a 3D surface plot?

a) surf()
b) mesh()
c) contour()
d) plot3()
Answer: a) surf()

How can you generate random numbers between 0 and 1 in MATLAB?

a) rand()
b) random()
c) randn()
d) randi()
Answer: a) rand()

What is the function of the for loop in MATLAB?

a) To perform operations in parallel
b) To iterate over a sequence of values
c) To create conditional statements
d) To handle exceptions
Answer: b) To iterate over a sequence of values

Which function would you use to create a matrix of ones in MATLAB?

a) ones()
b) matrix()
c) createones()
d) makeones()
Answer: a) ones()

What is the purpose of the meshgrid() function in MATLAB?

a) To create a grid of 3D data points
b) To generate 2D coordinate matrices
c) To perform mesh analysis
d) To plot 3D surfaces
Answer: b) To generate 2D coordinate matrices

How do you comment a single line in MATLAB code?

a) /* comment */
b) # comment
c) % comment
d) // comment
Answer: c) % comment

Which function is used to plot data points in 3D space in MATLAB?

a) plot3()
b) scatter3()
c) plot()
d) mesh()
Answer: a) plot3()

How can you find the size of a matrix A in MATLAB?

a) size(A)
b) length(A)
c) dimension(A)
d) lengthof(A)
Answer: a) size(A)

Which MATLAB function is used to compute the transpose of a matrix?

a) transpose()
b) trans()
c) t()
d) flip()
Answer: a) transpose()

What does the MATLAB function fft() do?

a) Computes the Fast Fourier Transform of a signal
b) Performs a matrix factorization
c) Finds the frequency of a signal
d) Calculates the factorial of a number
Answer: a) Computes the Fast Fourier Transform of a signal

Which function is used to read data from a file in MATLAB?

a) read()
b) import()
c) load()
d) fread()
Answer: c) load()

What does the clc command do in MATLAB?

a) Clears the command window
b) Closes all figures
c) Clears the workspace
d) Compiles the script
Answer: a) Clears the command window

How can you create a function in MATLAB?

a) Using function keyword
b) Using define keyword
c) Using create keyword
d) Using subroutine keyword
Answer: a) Using function keyword

Which MATLAB function is used to perform element-wise multiplication of matrices?

a) *
b) .*
c) multiply()
d) elemmul()
Answer: b) .*

What is the result of the MATLAB command size([1 2; 3 4; 5 6])?

a) [3 2]
b) [2 3]
c) [3 3]
d) [2 2]
Answer: a) [3 2]

How do you create a subplot with 2 rows and 3 columns in MATLAB?

a) subplot(2, 3, n)
b) subplot(3, 2, n)
c) subplot(2, 3)
d) subplot(n, 2, 3)
Answer: a) subplot(2, 3, n)

Which function is used to calculate the mean of a dataset in MATLAB?

a) average()
b) mean()
c) median()
d) mode()
Answer: b) mean()

What is the purpose of the fmincon() function in MATLAB?

a) To find the minimum value of a function with constraints
b) To perform curve fitting
c) To compute the Fourier transform
d) To solve linear equations
Answer: a) To find the minimum value of a function with constraints

How do you concatenate two matrices horizontally in MATLAB?

a) Using concat()
b) Using [A, B]
c) Using join(A, B)
d) Using hcat(A, B)
Answer: b) Using [A, B]

Which function is used to perform a correlation analysis in MATLAB?

a) correlate()
b) corr()
c) correlation()
d) crosscorr()
Answer: b) corr()

What does the clear command do in MATLAB?

a) Clears the command window
b) Clears the workspace variables
c) Clears the current figure
d) Clears the console output
Answer: b) Clears the workspace variables

Which function is used to calculate the norm of a matrix in MATLAB?

a) norm()
b) length()
c) measure()
d) calculate()
Answer: a) norm()

How do you transpose a matrix A in MATLAB?

a) A’
b) transpose(A)
c) flip(A)
d) A.T
Answer: a) A’

What is the function of ode45() in MATLAB?

a) To solve ordinary differential equations
b) To optimize functions
c) To perform matrix operations
d) To compute eigenvalues
Answer: a) To solve ordinary differential equations

Which MATLAB function would you use to find the index of the maximum element in an array?

a) findmax()
b) max()
c) indexmax()
d) maxindex()
Answer: b) max()

What does the MATLAB function bode() plot?

a) Time response of a system
b) Frequency response of a system
c) Step response of a system
d) Impulse response of a system
Answer: b) Frequency response of a system

How do you save a MATLAB figure to a file?

a) savefig()
b) exportgraphics()
c) save()
d) print()
Answer: d) print()

Which function is used to sort elements of a matrix in MATLAB?

a) sort()
b) order()
c) arrange()
d) sortmatrix()
Answer: a) sort()

How can you display the current working directory in MATLAB?

a) pwd()
b) dir()
c) path()
d) workingdirectory()
Answer: a) pwd()

What does the mesh() function do in MATLAB?

a) Creates a 3D surface plot
b) Generates a mesh grid
c) Plots 2D data
d) Creates a 3D wireframe plot
Answer: d) Creates a 3D wireframe plot

Which function is used to generate a random integer in MATLAB?

a) rand()
b) randint()
c) randi()
d) randomint()
Answer: c) randi()

What does length(A) return when A is a vector?

a) The number of columns in A
b) The number of rows in A
c) The total number of elements in A
d) The largest element in A
Answer: c) The total number of elements in A

Which MATLAB command is used to close all open figure windows?

a) close all
b) clear all
c) delete all
d) close()
Answer: a) close all

What does the hist() function create in MATLAB?

a) A bar graph
b) A pie chart
c) A histogram
d) A scatter plot
Answer: c) A histogram

How do you convert a string to a number in MATLAB?

a) str2num()
b) num2str()
c) string2number()
d) convert()
Answer: a) str2num()

Which MATLAB function is used to plot a 2D histogram?

a) hist()
b) hist2()
c) hist3()
d) histogram()
Answer: d) histogram()

What is the purpose of the axis function in MATLAB?

a) To set or query the axis limits of a plot
b) To create 3D plots
c) To compute matrix operations
d) To perform data fitting
Answer: a) To set or query the axis limits of a plot

How can you import a CSV file into MATLAB?

a) import()
b) csvread()
c) readcsv()
d) loadcsv()
Answer: b) csvread()

Which function is used to calculate the correlation coefficient between two vectors in MATLAB?

a) corrcoef()
b) correlate()
c) corr()
d) coef()
Answer: a) corrcoef()

What does the fill() function do in MATLAB?

a) Fills a plot with color
b) Fills missing values in a dataset
c) Fills a matrix with zeros
d) Fills a vector with NaNs
Answer: a) Fills a plot with color

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