It’s up to you to do some research on a company before an interview. Recruiters will expect that you’ve done your homework, and what you learn will help you to identify how well you’ll fit in with a potential employer. This activity is important for two main reasons:
(1) because good person-organization fit is linked to higher task performance, better work attitudes, lower intentions to quit, and less job stress; and
(2) because showing up at an interview having done your research shows recruiters that you took the time to learn about the business and prepares you to ask good questions. The goal of this exercise is to challenge your knowledge of the seven things you should learn about a company before showing up for an interview.

what to expect in an interview session

Explanation:) because good person-organization fit is linked to higher task performance, better work attitudes, lower intentions to quit, and less job stress; and  

(2) because showing up at an interview having done your research shows recruiters that you took the time to learn about the business and prepares you to ask good questions. The goal of this exercise is to challenge your knowledge of the seven things you should learn about  acompany before showing up for an interview .  Every Recruiter expect that you know what you are doing and also brush yourself up with information on your Resume and the company in question

no, a company likes to look at potential employees that are professional, well mannered, clean, honest, etc. don't show up looking/acting like a clown. (unless that's your job xd) hope this ! =^-^=