Informatica Software Developer interview questions

Submitted my resume at university career fair. Then got an email asking me to submit again online. Then OA test. Three questions for 90 minutes. Two of them are coding, which I think is extremely difficult. The other one is basic Java syntax.

The interviews and the entire process was held on-campus. 1. Mcq based round. 40 students were shortlisted. 2. Coding round- 90 minutes, 4 questions based on Strings, Array, Binary tree, graph respectively. 10 students were shortlisted after the coding round. There were 3 technical rounds based on Java and programs based on array, linkedlist, strings,etc. Finally 3 students reached the HR round after which 2 of us were selected.