You will encounter a variety of techniques and mannerisms exhibited by different interviewers. Some have had extensive training, others have had none; most are somewhere in between.
In all interviews, you must make a good first impression. Many interviewers are most influenced in their decisions within the first few minutes of the interview. This means arriving on time, being properly dressed and groomed, exhibiting positive non-verbal behavior (firm handshake, good eye contact, smile and confident presence). Even the initial "small talk" conversation is very important. It's difficult to recover from a bad beginning.
Learn the different interviewing techniques used by potential employers. Some techniques require specific preparation on your part. Listed below are several common interview styles.
Interview Techniques
Behavioral Interview
Traditional Interview
Serial Interview
Group/Panel Interview
Stress Interview
Case Method Interview
Technical Interview