The process was an OA and two LeetCode-style technical interviews. They also test for Googleyness in these interviews. LeetCode problems are easy to medium. I would just study LeetCode. I heard they are doing onsite rounds, too.
The following metrics were computed from 43 interview experiences for the Google SWE New Grad role.
Google's interview process for their SWE New Grad roles is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Google's SWE New Grad interview process.