Data Science with Python Certification Data Science with Python Matplotlib and Seaborn Visualization 2

Question 1

Which Seaborn function creates a matrix of scatter plots for every pair of variables in a DataFrame?

Accepted Answer

sns.pairplot()

Answer

sns.pairplot() generates a grid of scatter plots for all pairwise combinations of numeric variables.

Question 2

In Matplotlib, which method saves the current figure to a file?

Accepted Answer

plt.savefig()

Answer

plt.savefig('filename.png') saves the current figure to disk in the specified format.

Question 3

What does the 'hue' parameter do in Seaborn plots?

Accepted Answer

Maps a third variable to color encoding

Answer

The 'hue' parameter encodes an additional categorical or numeric variable through color differentiation.

Question 4

Which Matplotlib function creates a figure with multiple subplots and returns both the figure and axes objects?

Accepted Answer

plt.subplots()

Answer

plt.subplots() creates a figure and a grid of subplots, returning (fig, axes) as a tuple.

Question 5

In Seaborn, what is the purpose of sns.set_style('whitegrid')?

Accepted Answer

Sets the background to white with grid lines

Answer

sns.set_style('whitegrid') applies a white background with grid lines to all subsequent Seaborn plots.

Data Science with Python Certification Practice Test