1) Write a Java program to reverse a string and check if it is a palindrome, handling different edge test cases.

2) Explain the architectural differences between a HashMap and a ConcurrentHashMap in a multithreaded environment.

3) Create a backend REST API structure for a member registration module, detailing the database design and Spring Boot annotations used.

Question

1) Write a Java program to reverse a string and check if it is a palindrome, handling different edge test cases.

2) Explain the architectural differences between a HashMap and a ConcurrentHashMap in a multithreaded environment.

3) Create a backend REST API structure for a member registration module, detailing the database design and Spring Boot annotations used.

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