Depends on how nice your P.O. Is. Normally they give you a chance to come clean and tell them hey look I'm Dirty. Then they will give you the test , and let you know yes, you did fail. If they ask, and you know for s ure that you are going to fail, just tell them. B/c if you lie, than more than likely your going to piss th em off. Some P.Os take every given chance to send someone to jail, others would rather the honesty than a ride to the closest jail. But if it keeps going on, then he/she will have no other choice but to sendu back.
Yes there is no drinking or illegal drug use while on probation
The probation officer certainly reports the findings to the judge handling your case and yes jail maybe recommended...good luck
They definantly could if they wanted to because this is a violation of your probation. I've found that the best thing to do is be honest with your p.o. If you have to give a urine and know it will be dirty, just let them know you messed up and it is going to come out dirty. A cool p.o. Will most likely give you a 2nd chance and not violate you. If you don't say anything and give a dirty urine, chances are they will put you in jail.