DUI from other states -- what effect on my license?

Sean Hanover was asked a question regarding out-of-state DUI charges. His answer my be useful to others with similar questions.

Question:

I have DL from DC but got a DUI recently in CA. Will the DUI affect my driving record or will my license be revoked because of the DUI in CA. How/where do I find out if there is no warrant on me and the vehicle?