LinkedIn Interview Question

HackerRank - 3 sum less than k (most optimised version), 1 dynamic programming question which I dont remember Recruiter - It was a general discussion to see if I was a good fit for LinkedIn Telephonic 1 - Print Binary Tree Level order (later asked to print zig-zag level order), find all permutations of a string Telephonic 2 - Matching parenthesis, Valid Triangles(check leetcode)