Nothing.
Nothing is guaranteed after college. For current college students, preparing for the chapter after college is crucial and the planning should start as early as possible. The job market is dynamic and keeping abreast to the demands of various industries/job openings is important.
To prepare for the job market, college students should start early to look for internships and jobs. Internships will help you get your foot in the door as well as keep you ahead of other job applicants. It’s also helpful to have mentor(s) who can guide you over the course of your college career and beyond.