No. No background checks, no reference checks. You're a warm body that's just being put there for the sake of churning out boxes as fast as you can.
Not much... Maximum of 1 week.
No they are not doing
No background check that I am aware of, but reference checks if necessary.
Nope, they take anyone because they don't think production is an important part of their company. They are so classist they think any idiot can do a good job.