Dreaming of copying in exam is a negative sign as per dream meaning and interpretation. The dream means you will try shortcuts in life and it will end up causing more misery. It also means you will be underprepared to face certain situations.
Dream of copying in exam and you are with unknown people suggests failure due to tension and stress. It also means you will adopt illegal means for success and it will not be successful.
Dreaming of copying in exam and you are with known people means you will be caught for something illegal. You will face embarrassment and shame.
Dream of copying in exam and you are happy means you will escape after committing a blunder or illegal activity.