Which one is true?

Question

Where did you work before you worked here?

Or

Where did you work before you work here?

Answer 1

Where did you work before you worked here (past tense).

Answer 2

It's "worked," - past tense.

Answer 3

Where did you work before you worked here?

Or

Where did you work before you work here?

Although subtle, adding "previously" makes for a much more eloquent sentence.

Correction: Where did you previously work?

1. adverb [usually ADVERB with verb, oft ADVERB adjective] Previously means at some time before the period that you are talking about. Guyana's railways were previously owned by private companies. The contract was awarded to a previously unknown company.

For more information: https://www.oxfordlearnersdictionaries.com/definition/english/previously

Answer 4

Both are true, but the first one is the way we say it. We would say the second one like this: You work here; where did you work before?