If you received a Deferred Entry then likely you were allowed to enter a Guilty plea in a narcotic case and afterwards, your penalties were suspended while you completed a program. If this was done correctly, once you were successful and met your obligations, the court would have unwound your plea and dismissed the action against you allowing you to truthfully answer that you have never been convicted of a crime.
If you are truly uncertain about the status of your matter, speak with an attorney and allow him to pull the file and determine the final status for your matter.
PC 1000 is a form of deferred entry of judgment which rehires that you enter a guilty plea to qualify in most cases. Although after completing the program the case is dismissed the guilty plea may show on your record. As to what you must say it depends on what the job application asks for. Were you convicted? Not if the case was dismissed. Were you arrested? Yes, but CA law prohibits a potential employer from asking that question.
What does your job application question specifically state? If you are doing deferred entry of judgement, you do not have a conviction on your record. Technically, your case is still pending. You were not found guilty by the court, because criminal proceedings were interrupted, and your sentencing date is two years out.
If the question on your application asks have you been convicted of any misdemeanor? Your answer is no. However, jobs that require state licensing, nursing, real estate, etc still will require you to disclose this case in some way.