DAC Data Tools and Visualization 5

Question 1

Which visualization is best suited to show a trend over continuous time?

Accepted Answer

Line chart

Answer

A line chart connects points over time to reveal trends.

Question 2

In Power BI, what does establishing a relationship between two tables enable?

Accepted Answer

Filtering and aggregating across related tables

Answer

Table relationships let filters and aggregations flow across related tables in the model.

Question 3

A heatmap is most effective for what purpose?

Accepted Answer

Showing intensity across a two-dimensional matrix

Answer

A heatmap uses color intensity to show values across a 2D matrix of categories.

Question 4

Which practice reduces misleading interpretation in bar charts?

Accepted Answer

Starting the value axis at zero

Answer

Starting the bar axis at zero prevents exaggerating differences between bars.

Question 5

In data storytelling, what is the role of annotations on a chart?

Accepted Answer

Highlight key insights and guide the viewer's attention

Answer

Annotations call out key insights and direct the viewer's focus.

Data Analytics Certifications (DAC) Practice Test