The process consisted of basically 4 rounds.
First round was online test which was proctored. You need to well-versed with the computer science subjects, output problems, data structures and algorithms (output based) questions. Also, reasoning (quantitative and qualitative) was also there. English and comprehension section was also there. 3 interview rounds were there.
Round 1: Very basic DSA, just focused on the core computer science subjects.
Round 2: DSA from GfG, focused on the core CS subjects again. Actually at Oracle, they don't need people who are good at DSA, they need the ones who are good at cramming things and subjects.
Round 3: Simple DSA, some project related and some HR kind of questions were there in this round.