MATLAB Quiz | Practice Test / Quiz / MCQs

Classes | Practice Tests / Quizzes | User Guide | Life Manuals

28.5K quizzes covering K–12, CBSE, SAT, ACT, GRE, UPSC, SSC, Banking, Reasoning & more.

B.Sc (CS)
| Take A Quiz

Home > B.Sc (CS) > Quizzes > MATLAB Quiz

MATLAB Quiz

Fast practice, instant feedback. Timer auto-submits when time’s up.

Avg score: 5% • Most missed: “Which code snippet sets a new random seed based on the current time and saves th…”

Study First Challenge a Friend Stats

MATLAB Quiz

Time left 00:00

1. Which statement creates a logical array that is 1 if the element in 'passwords' contains a digit and 0 if it does not?
'passwords = {'abcd' '1234' 'qwerty' 'love1'};'

contains(password, '\d')~isempty(regexp(passwords, '\d'))cellfun(@(x) ~isempty(regexp(x, '\d')), passwords)regexp(passwords, '\d')

2. What does 'b' contain?

a =
19 20 12 0 6
6 9 56 0 3
46 8 9 8 19
9 8 8 19 46
1 9 46 6 19

b = 8 19 19 46NoneAllb = 56 0 9 8

3. Which function could you use for multiple linear regression?

polyfitsolvepolyvalregress

4. What is the size of 'b'?

a = [1 2 3];
b = repmat(a,2,3);

2x91x33x22x3

5. What is the state of a at the end of this code?

a = [1 2; 3 4];
b = a(:,2);
c = b + 3;
a(1:2,1) = c;

a =
6 3
7 4

Nonea = 6 7a = 5 2 7 4a = 5 7

6. Which choice will NOT give you a 5 x 5 identity matrix?

'identity(5)'a = rand(5);round(a * inv(a)) 'eye(5)' 'diag(ones(5, 1))'

7. Given the following x and y coordinates, which choice calculates a linear regression for the x and y coordinates, and which plots the points of the x,y data and the regression line on the same graph?

x = 9.0646 6.4362 7.8266 8.3945 5.6135 4.8186 2.8862 10.9311 1.1908 3.2586
y = 15.4357 11.0923 14.1417 14.9506 8.7687 8.0416 5.1662 20.5005 1.0978

figureplot(x,y)coeff_line = polyfit(x,y,1);x_line = floor(min(x)):0.1:ceil(max(x));y_line = polyval(coeff_line,x_line);hold on; plot(x_line,y_line)figureplot(x,y,'o')coeff_line = polyfit(x,y,1);x_line = floor(min(x)):0.1:ceil(max(x));y_line = polyval(coeff_line,x_line);plot(x_line,y_line)coeff_line = polyfit(x,y,1)x_line = floor(min(x)):0.1:ceil(max(x));y_line = polyval(coeff_line,x_line)figure; plot(x,y,'o')hold onplot(x_linemy_line)coeff_line = polyfit(x,y,1);x_line = floor(min(x)):0.1:ceil(max(x));y_line = polyval(coeff_line,x_line);figure; plot(x,y,'o')hold onplot(x_line,y_line)

8. You have plotted values of cosine from -10 to 10 and want to change the x-axis tick marks to every pi, from -3*pi to 3*pi. Which statement will do that?

xticks(linespace(-3*pi(), 3*pi(), pi()))xticks(linespace(-3*pi, 3*pi, pi)xticks(-3*pi:pi:3*pi)xticks(-3*pi:3.14:3*pi)

9. What does the Profiler track?

execution timeerrorscommand historythe value of variables

10. Which choice has a different final result in 'f10' than the other three?

'f10 = prod(1:10)'f10 = 1;for i = 1:10 f10 = f10 * i;end 'f10 = factorial(10)'MATLABf10 = 1;i = 1;while i

11. What is a reason to save a MAT-file using the '-v7.3' flag?

to include a variable greater that 2GBto use compression by defaultto avoid HDF5 overhead in MAT-fileto ensure backward compatibility

12. What built-in definition does i have?

index variableinfinitybasic imaginary unitindex function

13. You have a matrix 'data' in which each column is mono audio recording from a room in your house. You've noticed that each column has a very different mean and when you plot them all on the same graph, the spread across the y axis make it impossible to see anything. You want to subtract the mean from each column. Which code block will accomplish this?

data_nomean = zeros(size(data));for i = 1:size(data, 1) data_nomean(i, :) = data(i, :) - mean(data(i, :));end 'data_nomean = bsxfun(@minus, data, mean(data));' 'data_nomean = zscore(data');' 'data_nomean = data - repmat(median(data), size(data, 1), 1);'

14. Which code block most likely produced this graph?

BothAllfigurex = rand(10,10);r = corrcoef(x);surf(r)colorbarfigurex = rand(10,10);r = corrcoef(x);imagesc(r)colorbar

15. Which choice is correct syntax for a 'switch' statement?

x = 7;switch x case 2 disp('two'); default disp('not two');endx = 7;switch x case 2 disp('two'); else disp('not two');endx = 7;switch x : case 2 disp('two'); otherwise disp('not two');endx = 7;switch x case 2 disp('two'); otherwise disp('not two');end

16. Which choice is the proper syntax to append a new elements 'a' to the end of 1x 2 dimensional cell array 'C'?

C = cat(2, {a}, C)C = {C a};C{end+1}=aC = cellcat(C a)

17. At what will MATLAB look first for a called function?

functions on the pathbuilt-in functionsfunctions within the current filefunctions within the current directory

18. Where in the UI can you see what variables have been created, their values, and their class?

detailsEditorcommand windowworkspace

19. Which code block contains the correct syntax for a 'while' loop?

a = 0;while(a < 5) a = a + 1;a = 0;do a = a + 1;while a < 5enda = 0;while a < 5 a = a + 1;enda = 0;while a < 5: a = a + 1;

20. Which choice is the correct syntax for declaring a function that returns the input value as the output?

function b = mystery_func(a) b = a;enddef b = mystery_func(a) b = a;endfunction mystery_func(a) b = a; return b;endfunction mystery_func(a) : return a

21. What is a difference between global variable and persistent variables?

Global variables are accessible outside the function scope; persistent variables are not.Global variables can be used to cache data in memory; persistent variables cannot.Global variables have a higher performance overhead than persistent variables.Global variables remain in memory after clear all; persistent variables do not.

22. Which statement turns 'menu' into the variable 'menu_string' below?

menu = {'hot dog' 'corn dog' 'regular burger' 'cheeseburger' 'veggie burger'}
menu_string =
'hot dog
corn dog
regular burger
cheeseburger
veggie burger'

menu_string = cell2mat(join(menu, '\n'))menu_string = join(menu, newline)menu_string = cell2mat(pad(menu))menu_string = cell2mat(join(menu, newline))

23. What is the result of this code?

a = 1;
b = 2;
c = 3;
d = 4;
e = c / (~a - b == c - d);

Errorc = NaNc = Infc = -0.2500

24. Which command will create a 10-element vector v with values from 1 to 10?

v = 1:10v = (10)v = {1:10}v = [1-10]

25. What is the value of 'c'?

a = ones(1,3);
b = 1:3;
c = conv(a,b)

[-1 2 -1]6[1 -2 1][1 3 6 5 3]

Welcome to Fatskills

Join 4M+ learners. Unlock unlimited quizzes, wrong-answer tracking, flashcards + reminders, study guides, and 1-on-1 challenges.

Create a free account Sign in

900+ exams • Millions of questions • No spam

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈 Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

25 Questions

❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know? Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | OSHA Basics Quiz | What Should We Know?
Privacy | Terms |

Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com