What programming languages can we use to write code in codelitmus?

Hi, everyone.

I got a call from Piping rock and Surya software systems for a take from home test, which i think will be taken on the elitmus platform for testing named codelitmus, to which i am noob. So can someone please tell me anything about it. Mainly, about:

which language we can use to write the codes?
what are the type of questions asked?
what are we mainly tested on ,or what they are expecting from us?
is it only coding problems that would be asked?
what are the number of questions generally asked?
how much time is given to solve the test?
what are the requirements for giving the test from my computer, such as web cam,etc ?

thanks you all in advanceā€¦