Data and Analytics Data Visualization 3

Question 1

What does a waterfall chart primarily illustrate?

Accepted Answer

Cumulative effect of sequential positive and negative values

Answer

A waterfall chart shows how an initial value is affected by a series of positive and negative incremental changes to reach a final value.

Question 2

In Power BI, what is a 'slicer' used for?

Accepted Answer

Filtering dashboard visuals interactively by selected values

Answer

A slicer in Power BI is an interactive filter control that lets users segment all visuals on a report page by selected values.

Question 3

What is the purpose of a choropleth map?

Accepted Answer

Using color intensity to represent data values across geographic regions

Answer

A choropleth map shades geographic regions with colors proportional to a data variable, enabling geographic comparisons.

Question 4

Which Python library is most commonly used for statistical data visualization?

Accepted Answer

Seaborn

Answer

Seaborn is built on Matplotlib and provides a high-level interface for drawing attractive and informative statistical graphics.

Question 5

What is a Gantt chart primarily used for in data projects?

Accepted Answer

Project scheduling and timeline management

Answer

A Gantt chart displays project tasks as horizontal bars along a timeline, showing start dates, durations, and dependencies.

Data and Analytics Practice Test