Will Bayt provide study material before I take a test on Communication Skills? If not, please suggest some material to study before test?

I would suggest you take the test as you are presently. 

The assessment will provide inputs to what level of preparation and effort is needed to put you up to speed on "Communication Skills"

It will also be a good indicator of what areas need special attention and improved, as it will specify areas you are good at.

Happy Learning.