This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Two-Dimensional Plots”.

1. How can we smoothen the following graph of sin (t) and cos (t) into a circle?**a) reduce the gap between linearly spaced elements of the dependent variable t**

b) reduce the gap between elements of the dependent variable t

c) increase the gap between linearly spaced elements of the dependent variable t

d) increase the gap between elements of the dependent variable t

2. Which command gives a title to the graph plotted by MATLAB?

a) plot() generates the title itself**b) title()**

c) hlabel()

d) heading()

3. Which command enables a title for the x-axis?**a) xlabel()**

b) horilabel()

c) xlabel[]

d) no command

4. Which command enables a title for the y-axis?

a) vertlabel()**b) ylabel()**

c) ylabel[]

d) no command

5. How can several graphs for the same function be plotted on the same window?**a) Contour plots**

b) Bode plots

c) 3-D plots

d) n-D plots

6. What is the output of the following command?

meshgrid[x,y]

a) two x*y matrices

b) one x*y matrix

c) one y*x matrix**d) error**

7. What is the output of the following code?

t=0:0.001*pi:pi/2; plot(t,sin(t),*);

a) An inverted sine curve

b) A sine curve

c) A point**d) Error**

8. What is the slope of the sawtooth waveform generated by the sawtooth command?**a) 1/pi**

b) pi

c) 1/(2*pi)

d) 2*pi

9. What is the period of the sawtooth() waveform which is generated by the sawtooth() command?**a) 2*pi**

b) pi*2

c) pi

d) 3*pi/2

10. The command used to generate an array of arrows is ________

a) quiver[]

b) arrows()**c) quiver()**

d) arrows[]

11. What is the output of the following code?

t=0:.001*pi:2*pi; plot(cos(t),sin(t))

a) A circle

b) A straight line**c) A unit circle**

d) A sinusoid

12. The period of sinusoidal curves can be changed in MATLAB.**a) True**

b) False

13. The command to draw the nature of a function over a default fundamental period is _________**a) ezplot()**

b) plot()

c) stem()

d) plot3()

14. In the following code, what is the fundamental frequency of the sawtooth command?

f=1/50; sawtooth(2*pi*1/f*t)

**a) 50**

b) .02

c) 100

d) Error

15. The limits of the axes drawn are only specified in the command used to plot the graph itself.

a) True**b) False**

16. Which command is suitable to change the axes of the graph plotted?

a) axes**b) axis**

c) yxaxes

d) no command

17. What is the output of the following code?

ezplot(x^2)

a) No such command

b) A parabola

c) A part of a parabola**d) Error**

18. Which command can be used to generate multiple graphs in the same window?**a) hold on**

b) wait

c) not possible without contour command

d) not possible

19. Inline functions can be plotted by the _________ command.**a) ezplot()**

b) plot3()

c) plot()

d) cannot be done

20. Which toolbox provides the plot command?

a) Symbolic Maths Toolbox**b) Signal Processing Toolbox**

c) Engineering Toolbox

d) Functions

21. A power pattern for an antenna is a __________

a) 4-D plot of space and power

b) 3-D plot of space and power**c) 2-D plot of space and power**

d) Nothing called power pattern

22. The general graph of f(a,b)=0 is plotted by ______**a) ezplot()**

b) plot()

c) stem()

d) not possible

23. What is the period of square wave generated by the square() command?

a) User-defined

b) pi**c) 2*pi**

d) pi/2

24. What is the output of the following code?

plot(linspace[0,3*pi],square[linspace[0,3*pi]]);

a) A square wave from 0 to 3*pi

b) A square wave with 50% duty cycle from 0 to 3*pi

c) A square wave with 50% duty cycle**d) Error**

25. In a 2-d Plot, which command will make the axes of the graph same?**a) axis square**

b) axis equals

c) axes square

d) axes equal

26. What is the output of the following code?

title(‘x^2+y^2=r^2’)

**a) x ^{2}+y^{2} = r^{2}**

b) x^2+y^2 = r^2

c) Error

d) No such command

27. What is the output of the following code?

t=linspace(0,3*pi);p=sin(t);y=cos(t);plot(t,p,t,q);

a) Error**b) Multiple plots**

c) A unit circle

d) A sinusoidal

28. What is the default range used by the fplot command?**a) [-5,5]**

b) (-5,5)

c) No default range

d) No such command