Can a person have their DNA tested to determine their ethnicity?

Question:

Can a person have their DNA tested to determine their ethnicity?

Is that a possiblity?

Additional Details

3 months ago
the reason for why i would do it is to find out the truth about my ancestors...because its very strange that my whole life i have been asked if i am Spanish or mixed when i am not. Maybe i am and i just don't know exactly where i came from.

Best Answer - Chosen by Asker: 3 months ago
the reason for why i would do it is to find out the truth about my ancestors...because its very strange that my whole life i have been asked if i am Spanish or mixed when i am not. Maybe i am and i just don't know exactly where i came from.