The top 5 used frameworks, libraries and technologies

Question

1- Node.Js
2- AngularJS
3- .Net Core
4- React
5- Cordova

/////// and /////

6- Firbase
7- Xamarin
8- Hadoop
9- Spark

Answer 1

Where did this data come from?

I believe that it's better to rearrange them into groups by types and also create a top list of popular groups, like

Web Backend Development
Web Front-end Development
Mobile Development
Databases
Big Data
Machine Learning
Microservices

It's very strange question what is more popular Apache Spark or .Net Core. They solve absolutely different problems in different areas.

Answer 2

☺☺Very Informative