How long will two grams of coke stay in your system?

It depends on your habit. If you use on a regular basis it can be detected in your system for up to a week or more depending on the quality. If you only have used this one time in a few month's, you might squeak by a 4 days. It also depends on the testing procedure.

If its done for your work its not as risky as for a P.O.