A data analyst needs to save a figure for two purposes: a high-resolution image for a printed poster and a scalable vector graphic for a website. Which approach is most appropriate?

Save two files: one as PNG with dpi=300 and one as SVG

Save one file as JPEG with dpi=300

Save one file as PNG with dpi=72

Save one file as PDF with dpi=300

A data analyst is creating a figure with two subplots: one showing a histogram of ages and another showing a scatter plot of age vs. income. They want to ensure the subplots do not overlap and have enough space between them. Which parameter is most appropriate to adjust?

plt.subplots(1, 2, sharey=True)

A data analyst created a line chart showing website traffic over a year. They want to highlight a specific date (e.g., a marketing campaign launch) with an arrow and text. They also want to add a shaded region to indicate the duration of the campaign. Which approach is most appropriate?

Use plt.title() to mention the campaign and plt.axvline() to draw a line

Use plt.annotate() for the arrow and text, and plt.axvspan() to shade the campaign period

Use plt.legend() to highlight the campaign and plt.fill_between() to shade the region

Use plt.text() for the text and plt.axhline() to shade the campaign period

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 5Objective 1

Data Visualization Techniques PCAD-31 Practice Questions (Page 2)

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 6–10

6foundation · easy
Which Matplotlib function is used to set the locations of tick marks on the x-axis?
Select an answer first
7expert · medium
A data analyst needs to save a figure for two purposes: a high-resolution image for a printed poster and a scalable vector graphic for a website. Which approach is most appropriate?
Select an answer first
8application · medium
A data analyst is creating a figure with two subplots: one showing a histogram of ages and another showing a scatter plot of age vs. income. They want to ensure the subplots do not overlap and have enough space between them. Which parameter is most appropriate to adjust?
Select an answer first
9expert · medium
A data analyst created a line chart showing website traffic over a year. They want to highlight a specific date (e.g., a marketing campaign launch) with an arrow and text. They also want to add a shaded region to indicate the duration of the campaign. Which approach is most appropriate?
Select an answer first
10application · medium
A data analyst needs to show the proportion of total sales contributed by each product category (e.g., Electronics, Clothing, Books). The categories sum to 100% of sales. Which chart type is most appropriate to convey the part-to-whole relationship?
Select an answer first

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Data Visualization Techniques PCAD-31 Practice Questions (Page 2)

Questions 6–10

Which Matplotlib function is used to set the locations of tick marks on the x-axis?

A data analyst needs to save a figure for two purposes: a high-resolution image for a printed poster and a scalable vector graphic for a website. Which approach is most appropriate?

A data analyst is creating a figure with two subplots: one showing a histogram of ages and another showing a scatter plot of age vs. income. They want to ensure the subplots do not overlap and have enough space between them. Which parameter is most appropriate to adjust?

A data analyst created a line chart showing website traffic over a year. They want to highlight a specific date (e.g., a marketing campaign launch) with an arrow and text. They also want to add a shaded region to indicate the duration of the campaign. Which approach is most appropriate?

A data analyst needs to show the proportion of total sales contributed by each product category (e.g., Electronics, Clothing, Books). The categories sum to 100% of sales. Which chart type is most appropriate to convey the part-to-whole relationship?

Keep studying — Data Communication and Visualization