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Discuss data structures, algorithms, in-depth Java, and Spring Boot questions. Include two LeetCode medium and one hard problem covering concepts like: * Graphs * DP * Trees * Concurrency * Design patterns * Optimizations

During my second round of interviews, I repeatedly asked HR if the interviewer was late, should we proceed with the interview or not. She assured me everything would be fine. The interviewer himself was late, joining 20 minutes after the scheduled t

Written 1. Create your own linked list and write a function to find the middle element of the list. 2. Consider an array which contains alphabets from 'a' to 'z'. Write a program that uses two threads to print this array. 3. Consider an array of inte