Python Quiz on Matplotlib

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There are 20 questions based on Matplotlib Library in Python.

Q1. What does the following code display?
import matplotlib.pyplot as plt
plt.plot([1, 2, 3, 4])
plt.show()
*

4 points

A bar chart

A line graph

A scatter plot

Nothing

Q2. What is the default x-axis in the code ?

import matplotlib.pyplot as plt
plt.plot([1, 2, 3, 4])
plt.show()

4 points

[0, 1, 2, 3]

[1, 2, 3, 4]

[1, 3, 5, 7]

Random values

Q3. What does this code do?

plt.title("My Graph")

4 points

Sets the y-axis label

Sets the x-axis label

Adds a legend

Sets the graph title

Q4 Which command sets the x-axis label?
*

4 points

plt.xlabel("X")

plt.xaxis("X")

plt.axis.x("X")

plt.labelx("X")

Q5. What will this code display?

plt.plot([1,2,3],[4,5,6],'ro')
plt.show()

4 points

A red line

Red circles

Blue line

Green squares

Q6. What does 'r--' mean in plt.plot(x, y, 'r--')? *

4 points

Red solid line

Red dotted line

Red dashed line

Random color line

Q7. What function adds a legend to a plot? *

4 points

plt.legend()

plt.add_legend()

plt.show_legend()

plt.display_legend()

Q8. What does this code do?
plt.subplot(2,1,1)
*

4 points

Creates 2 subplots horizontally

Creates 2 subplots vertically and activates the 1st one

Creates a single plot

None

Q9. What will this code produce? *

4 points

Line graph

Scatter plot

Bar chart

Histogram

Q10. What is the purpose of plt.grid(True)? *

4 points

Adds gridlines

Adds legend

Removes axes

Changes color

Q11. Which function displays the plot on screen? *

4 points

plt.display()

plt.plot()

plt.show()

plt.open()

Q12. What will this code do?

plt.scatter([1,2,3],[4,5,6])

4 points

Line graph

Bar chart

Scatter plot

Histogram

Q13. How can you save a figure to a file? *

4 points

plt.save("figure.png")

plt.savefig("figure.png")

plt.savefile("figure.png")

plt.store("figure.png")

Q14. Which function clears the current figure? *

4 points

plt.clear()

plt.clf()

plt.close()

plt.clean()

Q15. Which function closes the figure window? *

4 points

plt.clf()

plt.clear()

plt.close()

plt.exit()

Q16. What does this code produce?
plt.hist([1,1,2,3,3,3,4])
plt.show()

4 points

Scatter plot

Bar chart

Histogram

Line plot

Q17. What does this code do?

plt.figure(figsize=(6,4))

4 points

Creates a new figure of given size

Sets axes size

Changes DPI

Zooms the plot

Q18. Which command changes line width? *

4 points

linewidth

width

Both A and C

Q19. What does plt.axis('equal') do? *

4 points

Equal axis limits

Equal x and y spacing

Equal aspect ratio

Equal plot size

Q20. What happens if you run plt.plot() without arguments? *

4 points

Empty plot is created

Error

Random line is drawn

Closes plot

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