Thoughtworks Interview Question

1. How Dev architecture works. 2. What are microservices and relation with API. 3. Cloud services and terraform.(dev architecture) 4. How APIs work and get automated? 5. If the server communication is not built yet, how do you test application only with front end and API. 6. How Reactjs works (my current technology is Nightwatch) 7. SQL queries on inner join and count of top nth salary.