my last project and then 2 simple array questions(anyone can solve)

Round 1(Technical): Interviewer took a brief look at my resume. Basic questions: Tell me about yourself? Asked me questions related to all my projects and each point that I highlighted in my resume. DSA questions :  https://www.google.com/amp/s/www.geeksforgeeks.org/sum-two-large-numbers/amp/ Binary tree question involving concepts of :  https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/ Exact question was: You are given a binary tree, a start node and an end node. You need to print the path you will take to reach from start node to end node and print the pattern of your movement in a string for e.g- “UULRRL” Dev questions: Why can't we use mongoose library in react frontend to update the data rather than installing it in backend? Why did you prefer React JS and React Native over other frontend libraries/frameworks? What is Babel and what does it do?   Round 2 (Technical + HR): Basic questions: Tell me about yourself? Detailed experience of your internship work? Draw the working architecture of my main project and explain it? What is an API? DSA questions: Are you aware of Dynamic Programming, what is it? Gave me a follow up question :  You are given a number x (for e.g:  x = 2) and a number n (e.g n = 30). We can do following operations -  Either append x as a digit to the front of a number. Or add x to a number. We can do the above operations as many times, we have to find the number of ways in which the sum equals n. Explanation : Here we can have “2” ways to get sum = 30 : 2+2+2+2+2+2+2+2+2+2+2+2+2+2+2 = 30 22+2+2+2 = 30 (I think he was satisfied with my solution so he didn’t ask me another question) HR questions: Tell me about your upbringing, hometown, early education? What was your experience in Kota? (Because i mentioned that i went to Kota for JEE preparation) How is life at IIT different from your life at school or coaching? Who is the best coder in your branch, where is he placed right now?  (I took Sahil Setia’s name he is a candidate master on CF) Last question was a bit lengthy and checked my response if I'm trapped in a situation, which is very tough. For example if there is a bug and there’s no one to help in the office how will I deal with it?