A data analyst created a bar chart showing the number of website visits per day. The x-axis labels (dates) are overlapping and unreadable. Which approach is most appropriate to fix this?

Remove the x-axis labels entirely

Rotate the x-axis tick labels using plt.xticks(rotation=45)

Use a logarithmic scale on the y-axis

A data analyst created a line chart showing monthly revenue for a company. They want to highlight the month with the highest revenue by adding a text label and an arrow pointing to that specific point. Which Matplotlib function is most appropriate?

plt.text('Peak', x=month, y=revenue)

plt.annotate('Peak', xy=(month, revenue), xytext=(month+1, revenue*1.1), arrowprops=dict(arrowstyle='->'))

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 5Objective 1

Data Visualization Techniques PCAD-31 Practice Questions (Page 4)

Part of the Data Communication and Visualization domain, which accounts for 10.4% of the PCAD-31 exam. Python Institute does not publish an official question count, but from its 60-minute exam (~25–40 total, ~3–3 in this domain), expect 2–2 from this objective — we provide 39 practice questions to prepare you well beyond it. (estimate)

39questions here

8free pages

12concepts

10.4%of the exam

Questions 16–20

16application · medium
A data analyst created a bar chart showing the number of website visits per day. The x-axis labels (dates) are overlapping and unreadable. Which approach is most appropriate to fix this?
Select an answer first
17foundation · easy
Which Seaborn function is designed to create a scatter plot with optional regression lines?
Select an answer first
18application · medium
A data analyst created a line chart showing monthly revenue for a company. They want to highlight the month with the highest revenue by adding a text label and an arrow pointing to that specific point. Which Matplotlib function is most appropriate?
Select an answer first
19foundation · easy
Which Seaborn function is used to apply a predefined theme to all plots?
Select an answer first
20foundation · easy
Which Matplotlib function is used to add a label to the x-axis?
Select an answer first

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Data Visualization Techniques PCAD-31 Practice Questions (Page 4)

Questions 16–20

A data analyst created a bar chart showing the number of website visits per day. The x-axis labels (dates) are overlapping and unreadable. Which approach is most appropriate to fix this?

Which Seaborn function is designed to create a scatter plot with optional regression lines?

A data analyst created a line chart showing monthly revenue for a company. They want to highlight the month with the highest revenue by adding a text label and an arrow pointing to that specific point. Which Matplotlib function is most appropriate?

Which Seaborn function is used to apply a predefined theme to all plots?

Which Matplotlib function is used to add a label to the x-axis?

Keep studying — Data Communication and Visualization