Johnson & Johnson offers varied internship positions, some of them are summer internship as well.
Normally the hiring process starts with online application in a university career-fair by filling a form. Afterwards, you meet J&J recruiter. If the HR interview went well, the next interview will be held in J&J offices with one or more managers (direct manager, branch manager, director). Johnson & Johnson HR team are flexible, so if you couldn't attend the live office interview, they may consider to interview you in an online conference call.
You will be asked in-depth questions about your resume and experience in your HR interview but also from the managers in the onsite interview.