Whatfix Full Stack Developer interview questions

HackerEarth test: 1. 2 questions were provided. I completed 1 and got a call for F2F interview. Technical 1: 1. All about resume. Back your resume. 2. Given an array from range 1 to n, one of the number may or may not be duplicate. find whether the array has duplicates. 3. Given a string, find out whether it is Perfect String or not. Perfect String here is a String which has the same frequency of characters or after performing 1 deletion, the frequencies become same. Ex. aabb, aabbc, ababd are perfect strings. aabbbc, abcddee are not Technical 2: 1. Advance level questions from Java and Project. 2. Find the shortest path between 2 nodes of a graph. Technical 3(manager): 1. Details of my project. My role. 2. Find path between 2 nodes of a BST, from left to right. 3. Design a way so that a advertisement could be shown in a language according to the population of that language. 4. Explained the roles. HR (cum techi): 1. The coolest HR, I have ever met. 2. He was interviewing me irrespective to the Coding language, Verbal Language and casually.