After applying online/paper you will be called in for a math skills test, (Pre-algebra and elementary math), as well as to turn in proof of education. (No proof, no job). If passed, you'll be escorted to an interview. Interview questions were basic such as why do you want to work here. What did you do before? etc.
They perform a very rigorous background (you'll know why once your hired).
If all goes well you'll then be called for a drug and physical test (lift test)
They, at least in the inland empire region, hire in groups and you'll wait at least 3 weeks plus.