IN WHICH PROGRAMMING LANGUAGES FACEBOOK WEBSITE IS DESIGNED

Answer 1

Facebook uses the LAMP stack, so if you want to get a career with them you're going to want to focus on that. In addition they often have C++ and/or Java listed in their requirements as well.

One of the postings includes the following requirements:

Expertise with C++ and/or Java
Knowledge of Perl or PHP or Python
Knowledge of relational databases and SQL, preferably MySQL and Oracle
Another:

Expertise in PHP, JavaScript, and CSS.
Another:

Knowledge of Perl or PHP or Python
Knowledge of relational databases and
SQL, preferably MySQL Knowledge of
web technologies: XHTML, JavaScript Experience with C, C++ a plus

Answer 2

for FRONT END (client side ) javascript,

BACKEND ( server side ) hack , php, python, c++ , java ,

DATABASE Mysql ,maria db
and different more.

Answer 3

PHP