JPMorgan Chase & Co. Associate Interview Questions, Process, and Tips

Endpoints in microservices are responsible for handling incoming requests and sending responses.

• Endpoints are the entry points for a microservice

• They handle incoming requests and send responses

• Endpoints can be HTTP endpoints, message queue endpoints, or event-driven endpoints

• Examples of endpoints include RESTful APIs, SOAP APIs, and GraphQL APIs

I handle custom exceptions by creating my own exception classes and throwing them when necessary.

• I create custom exception classes that extend the built-in Exception class

• I throw these exceptions when specific errors occur in my code

• I catch these exceptions in a try-catch block and handle them appropriately

• I include helpful error messages in my custom exceptions to aid in debugging

Transactional can be used in microservices to ensure data consistency and integrity.

• Transactional mechanisms can be used to ensure that all microservices involved in a transaction either commit or rollback together.

• Transactional boundaries can be defined to ensure that all data changes within a transaction are atomic and consistent.

• Transactional messaging can be used to ensure that messages are delivered exactly once a...read more

I have optimized queries by using indexes, reducing the number of joins, and optimizing subqueries.

• Used indexes to speed up data retrieval

• Reduced the number of joins to minimize the query execution time

• Optimized subqueries by using temporary tables or rewriting them as joins

• Used query profiling tools to identify and fix performance bottlenecks