Data Visualization Visualization Tools and Software

Question 1

In Tableau, what is the difference between a 'dimension' and a 'measure'?

Accepted Answer

Dimensions are categorical/qualitative fields; measures are numeric/quantitative fields

Answer

In Tableau, dimensions are categorical fields used for slicing and grouping (e.g., Region, Category), while measures are numeric fields that can be aggregated (e.g., Sales, Profit).

Question 2

What is D3.js primarily used for in data visualization?

Accepted Answer

Building custom, interactive data visualizations in web browsers using SVG and HTML

Answer

D3.js (Data-Driven Documents) is a JavaScript library that binds data to DOM elements to create highly customizable, interactive browser-based visualizations.

Question 3

In Power BI, what is a 'DAX measure'?

Accepted Answer

A calculated field defined using Data Analysis Expressions that computes values dynamically

Answer

DAX (Data Analysis Expressions) measures are formulas that compute aggregated values dynamically based on the current filter context in a Power BI report.

Question 4

What is Vega-Lite primarily designed for?

Accepted Answer

A high-level grammar for creating interactive visualizations with minimal code

Answer

Vega-Lite is a high-level visualization grammar that allows creating interactive, composable charts using a concise JSON specification.

Question 5

In Tableau, what is a 'calculated field'?

Accepted Answer

A new field created using Tableau formulas to transform or combine existing data

Answer

Calculated fields in Tableau let you create new dimensions or measures using Tableau's formula language to transform, combine, or derive values from existing fields.

Data Visualization Practice Test

Data Visualization Practice Test

Data Visualization Visualization Tools and Software