I was rejected the B1 VISA twice in a row within a span of 6 months. Then I applied for L1 B which was approved and I travelled to USA.
I again went for my B1 VISA interview (after about 2 yrs of rejection) and yes I was very tensed but the Consul (a very kind lady )just asked me 2 questions.
1. How long have u been with you company ?
A. I have been wiht XYZ for over 3.5 yrs
2. Have you ever been to USA ?
A. Yes
And I got my VISA
Source: Immihelp