There was two level of technical interview.first level was not that much tough but second level of questions was tough. You need complete knowledge of Java and data structures they can ask internal functionality and process of code.

1. Test Aptitude & Coding Test 3 Panel Interview 1-- DS -- Stacks, Queue, LinkedList 2--MySQL - Queries, Indexes, Joins AWS - S3, EC2, Elastic Beanstalk, Cloudwatch, etc Java- Collections, Exception Handling, Lambda, Stream API, Multithreading 3--HR