New engineers at Meta Platforms spend six weeks going through a $$boot camp$$ where they complete problem$-$solving exercises and training modules and become immersed in the company$$s culture. They are also assigned a mentor and given the opportunity to work short stints in multiple departments to gain experience, skills, and familiarity with the company. This is called $\_\_\_\_\_\_\_.$

pre$-$employment testing

recruitment

orientation

an onboarding process

compensation