If you violate probation with suspended sentence do you serve the suspended sentence automatically?

It's up to the Judge. If it's failure to comply with any number assignments like classes, then make sure the class is done before you go into court. The judge wants to see that you're active in completing whatever it is you were ordered to complete. If you show up to court with nothing to show for yourself, they're going to throw you in jail. Complete any and everything you can and more than likely you will be fine. First time probation violitions are typically a slap on the wrist.