D3 js Interview Questions and Answers

What Is D3.js? Why use to D3.js? What Are Key features?

What Is D3.js?
The D3 stands for “Data Driven Documents” and it was developed by Mike Bostock during his Ph.D. studies at the Stanford Visualization Group.

D3.js is a smallopen-source and JavaScript library and it used to creating and manipulating documents based on data. It is also control of dynamic and interactive graphical presentation which runs in web browsers.

D3.js is also used for manipulating HTML and SVG documents based on data. D3.js helps you bring data to life using HTML, SVG, and CSS.

Why use to D3.js?
D3.js is small and open-source and written in JavaScript.
D3.js is used for dynamic, interactive graphical presentation and data visualization frameworks.
D3.js main focuses on binding data to DOM elements.
D3.js is used for creating custom visualizations like Pie chart, graphs, bar charts or geospatial maps.
How to Installing Data Driven Documents (D3.js)?
If you are using the npm then you install - npm install d3. Otherwise, download –
The developer version –
<script src="https://d3js.org/d3.v5.js"></script>


The minified version –
<script src="https://d3js.org/d3.v5.min.js"></script>


You can also use the standalone D3 micro libraries –
<script src="https://d3js.org/d3-selection.v1.js"></script>


What Are the key features of D3.js?
1.      Data Driven
2.      DOM Manipulation
3.      Interaction and animation
4.      Custom Visualizations - Pie chart, graphs, bar charts or geospatial maps
5.      Transitions
ANIL SINGH

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