Google Software Engineer Internship interview questions

I Applied Online, and then received a link to submit the answer to the coding interview. I was then offered to directly apply to new graduate program. The interview was very easy, probably it was designed for in-school undergrads.

First was a pair of online coding questions. 45 minutes each and no efficiency requirements. About two weeks later it was a pair of phone interviews using Google docs for shared coding. Each was 45 minutes and they were back to back. Two weeks later they got back to me and schedule two more phone interviews. As I understand it this is unusual and might have been because I struggled on the second interview. About two weeks after that I recieved an automated email denying me.