And what other languages do you know?
Also depends what the test is about and how much it is general programming (like algorithms) and how much a specific use-case/library (like django).
It's 100% algorithms. The question is mostly about how hard it is to figure out what parts of standard library to use to solve a given Rosetta Code-style problem under stress, and how many caveats I have to remember. For example, C# is straight forward enough that if you know any other Java-like language, you don't even need to learn it to do basic stuff (and stdlib parts are highly googlable), whereas C++ takes months of practice if you want your hello worlds not crash instantly.