SmartClean Technologies interview question

The technical round had questions from specific technology/language(Spring, Spring-boot, JAVA), version-specific details/features(JAVA 8, collections, Executor-Service, Lambda) DS/Algo round - 1 had two coding questions:- 1. A coding question on Stack (don't remember exact question) 2. A coding question on BST traversal DS/Algo round -2 had one coding question 1. longest valid bracket substring. Managerial/HR round Questions related to personal goals and aspirations, Company profile, etc