Is these used for unit testing ? I am beginner in testing and would like to get into testing/QA field. Usually testers do the unit testing ? Or the developers ? Most oppotunities want scripting experience. What do they usually mean by that ?
Developers do the unit testing. QA does the end-to-end/functional/user acceptance testing. (Developers do some of this to, but it is QA's job to certify the product.)
When they ask for scripting experience, they usually mean a playback record tool's scripting language. You can search for QA on a job listings site to see which ones are most common and the present time.