Are use of multiple languages common in software dev ?

Question

For example, using both Java & python.

If so, which languages are most common used together (Like how HTML is associated with javascript) ?

Answer 1

It will be common in certain areas. One good mix is C++ and Python, they really go well together.

Answer 2

It depends on the team you are in, but mostly they are concentrating on one language.

Btw, HTML is a little exception, because it's not a programming language.

Answer 3

Typically a combination of a compiled language (for the actual product development) eg java or c++, with a script/interpreted language (for tools and automation) eg python or perl. For web development there is a combination of languages and techniques eg javascript/html/css + backend script/php/sql. Also some knowledge of shell scripting and xml/xslt is a good addition too.