Tata Consultancy Services Senior Java Developer interview questions

How to implement rate limiting, how to implement method level security in springboot how to save the secrets in spring boot, microservices aggregator design pattern if microservices has same database, two services at a time how data base manage it. microservice principles how to externalize properties in spring boot. How streams work internally-why its faster. when you have multiple databases connect, how transaction works, which data source it will insert