Trinity Industries FITTER/WELDER interview questions

I applied online and received a phone call a few days later asking me to come in and take a weld test. I had never welded flux core before and a friend of mine said they didn't use gas. i went in to take the test they put you into a welding booth and let you play with some scrap for a few minutes after a few minutes i asked the tester why all my welds were coming out porosity he said they do in fact use gas. after that the test was easy he asked me to weld a vertical up weld which i did i received a call back after the holidays were over telling me to come in and do paperwork as well as my start date.