Difference between worker thread and backgroundworker thread? [duplicate]

Question

Possible Duplicate:
Difference between BackgroundWorker and Thread?

I was asked this question in an interview . what should be answer for this ?

Answer 1

The word "background" implies that it performs less critical tasks than non-background threads and it doesn't matter some much when they complete. In Java this can mean using a daemon thread.

Technically they are the same thing and the different is subjective.