Although the exact technology of these websites may evolve over time, I can provide you with a general overview of the programming languages that have historically been used for these popular websites.
LinkedIn:
Frontend: JavaScript, TypeScript, HTML, CSS
Backend: Java, Scala
Facebook:
Frontend: JavaScript, ReactJS (also uses its fork, React Native, for mobile apps)
Backend: Hack (a language developed by Facebook), PHP
Instagram:
Frontend: JavaScript, React Native (for mobile apps)
Backend: Python, Django
Wikipedia:
Frontend: JavaScript, CSS, HTML
Backend: PHP, HHVM
YouTube:
Frontend: JavaScript, Polymer (Web Components library)
Backend: Python, C++, Go
Netflix:
Frontend: JavaScript, React
Backend: Java, Scala, Node.js
Domino’s:
Frontend: JavaScript, React
Backend: Java (for traditional web systems), Node.js (for some applications)
Amazon:
Frontend: JavaScript, React
Backend: Java, C++, Perl
eBay:
Frontend: JavaScript, HTML, CSS
Backend: Java, Node.js
Canva:
Frontend: JavaScript, React
Backend: Java, Kotlin
Please note that the technology stack for websites may change over time due to evolving technologies and business requirements. It is also common for websites to use a combination of different programming languages and technologies to achieve their functionalities. Always refer to the latest sources for the latest information on the technology stack.