[xapata]

> which languages are most popular?

Is there any other (reasonable) way to interpret that question?

[leeny]

Wasn't sure if you were asking that independently of endorsements.

Right now, the most heavily used languages on interviewing.io are Java, Python, JavaScript, and C++ (in that order).

Ruby, C#, and Go are in the middle.

At the bottom are Perl and PHP.