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note: If you're using AWS Spring Boot App with default port:8080 must use in AWS Environment SERVER_PORT:5000 port Number otherwise you will get Serve 502 Bad Gateway. or Configure port in environment PORT port number example: PORT 7869

Q) Which payment gateway API do you choose in your project for different kinds of transactions like debit cards, credit cards, UPI, etc? A) I will choose Braintree Payment Gateway because the transactions charges very less compare to Stripe Payment Gateway.

Java Coding Exercises Links:

1. https://www.w3resource.com/java-exercises/
2. https://practice.geeksforgeeks.org/explore?page=1&sortBy=submissions&utm_medium=newui_home&utm_campaign=first_section

Microservices Design Patterns:

1. https://microservices.io/patterns/index.html

All Interview Questions Link:

1. https://www.javatpoint.com/interview-questions-and-answers

                                                         I love coding ...