Its always important to all freshers and even for experienced people to know about body language.
What is Body Language:
Body language refers to forms of non-verbal communication, wherein a person reveals clues as to some unspoken intention or feeling through their physical behavior.
These behaviors can include body posture, gestures, facial expressions, and eye movements. - Wikipedia
Every resources which you present and carry during an interview will be counted and considered for your position.
Hence, knowing your body language and common mistakes is very important during an interview.
Common body language mistakes:
Staring
Shifty Eyes
Mismatched Expressions
Hands Behind Back
Fidgeting
Excessive Nodding
Crossed Arms
Chopping and Pointing
Breaking Eye Contact
Bad Posture