Help me please

wonder if you could shed some light on my case.

I was scheduled for an IT interview with a big company next week from 11am to 3pm, with 5 people, each 45 minutes. I have a few questions.

1) Will I be having lunch with the 2nd or 3rd guy?
I am thinking I will, but the agenda did not say,
just wonder whether any one had similiar experience.

2) For salary history, lets say I dont care about
losing this opportunity and BS about my previous
salary, is there a way for them to find it out?
No 3rd company is involved, just want a boost!

Thanks, my kindest XDJM.