Google Agra: What Programming Language use top 20 Website in world 2015

U Must be  know.
[1]Google
Main:C++, Python, Javascript
Other: Go, Java, Objective-C

[2] Facebook:
Main: PHP, Hack, C++, Javascript
Other: Java, D, Objective-C

[3] Yahoo:
Main: C++, Objective-C
Other: Python, Java

[4] Amazon:
Main: C++, Java(AWS + Data)
Other: Ruby

[5] Twitter:
Main: Scala, Java, Ruby

[6] Square:
Main: Scala, Java, JRuby

[7] Airbnb:
Main: Java, Scala

[8] Uber:
Main: Node.js, Python

[9] Linkedin:
Main: Scala, Java

[10] Tumblr:
Main: PHP, Scala

[11] Groupon:
Main: Node.js

[12] Quora:
Main: Python
Other: C

[13] Pinterest:
Main: Python

[14] Glassdoor:
Main: PHP

[15] Godaddy:
Main: PHP

[16] Salesforce:
Main: Java, Scala

[17] Dropbox:
Main: Python

[18] DigitalOcean:
Main:  C, C++, Ruby

#Note Points

1. Big companies choose C++ as their main language for back-end platform, like Google and Facebook and Yahoo and Amazon.
2. Hot Start-up choose Python and Node.js.
3. And PHP is still a good choice. Although currently people think that is old-fashioned, but if you dive into PHP, you will find something.
4. Personally speaking, Python and C++ is a good combination.