Yes! Do research on each company you’re applying to. They all will most likely have a specific domain of working. This narrows down the things you might be asked and you can prepare more efficiently for each of them. Customise your preparation accordingly, and make sure you cover all bases of their field of work. They will appreciate the time you spent getting to know their company. This will also help you in future interviews, where you will be able to judge what questions might be asked.