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

Dimensions are time-based; measures are categorical

Answer

Dimensions appear on the X-axis; measures appear on the Y-axis

Answer

Dimensions are from databases; measures are calculated

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

Creating static PDF reports

Answer

Connecting to SQL databases

Answer

Generating automated slide presentations

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

A dashboard accessibility feature

Answer

A data import tool

Answer

A chart type for financial analysis

Question 4

What is Vega-Lite primarily designed for?

Accepted Answer

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

Answer

Fast video game graphics

Answer

Low-level WebGL rendering

Answer

Lightweight Excel charting

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

A field imported from Excel formulas

Answer

A field that auto-calculates row totals

Answer

A field from a calculated column in SQL

Question 6

What is the primary advantage of using Python's Matplotlib library over tools like Tableau?

Accepted Answer

Full programmatic control and reproducibility in code-based analytical workflows

Answer

Easier drag-and-drop interface

Answer

Better color palettes

Answer

Faster rendering for large datasets