ServiceNow Software Engineer(Internship) interview questions

Recruiter contacted me through email after applying online. First round was phone screening. Interviewer asked me Binary tree question(if the node values of the BST is equal to the given sum) .He just wanted me to code on collabedit. Next 2 rounds were supposed to be webex video interview but it was on phone. In 2nd round, interviewer asked me to code zigzag level order traversal. Third round was immediately after second round. In this round , they asked meto design a public library management system. Interviewers were good. But sent rejection emailafter a month since they were busy filtering candidates.

I attended an university career fair and gave my resume to the recruiters. I got an interview 1.5 weeks later. The interviewer was very friendly. He asked me 3 behavioral questions and 3 coding questions in a 45-minute interview. The interview started and ended at exactly the scheduled time. There was only 1 interviewer, 1 desk, 2 chairs across each other, and 1 whiteboard.