Google Software Development Engineer SDE Intern interview questions

It started with the basic introduction and some questions related to OOPs and then he asked me one coding question related to the same which I couldn't solve completely and the he asked me to do the pre order traversal of the tree.

Resume shortlisting followed by google online coding challenge followed by two to three technical interviews. 14 candidates are shortlisted in on campus process for the interviews. I was shortlisted for the interviews. All interviews are forty five mins and are eliminative in nature.