Contacted by HR from Oracle because of a recruiting event. Had a phone interview that lasted an hour with an HR Rep. She liked what I had to say and sent my resume to the Hiring Manager. I got an email from the HR Rep setting up an interview. I had a 1:1 interview with the Hiring Manager that lasted an hour, a 30 minute 1:1 interview with a Team Lead and a half hour phone interview with another team lead.