Singleton class in Java Why string is immutable in Java ? Difference between ArrayList & LinkedList What is IOC in Spring Find 3rd largest integer in integer array using streams in java. Java 8 nee features Sort integer array using streams Microservices architecture Transaction management in Microservices AWS S3, DynamoDB

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A set of interview questions for a Senior Java Developer position.

Singleton class in Java is a class that allows only one instance of itself to be created.
String is immutable in Java because it ensures thread safety and allows for efficient memory management.
ArrayList and LinkedList are both implementations of the List interface, but differ in their underlying data structure and performance characteristics.
IOC (Inversion of Control) in Spring is a design principle that allows the framework to manage the creation and dependency injection of objects.
To find the 3rd largest integer in an integer array using streams in Java, you can sort the array in descending order and then retrieve the element at index 2.
Java 8 introduced several new features such as lambda expressions, functional interfaces, streams, and the Optional class.
To sort an integer array using streams in Java, you can use the sorted() method and provide a comparator.
Microservices architecture is an architectural style that structures an application as a collection of loosely coupled services.
Transaction management in Microservices involves handling distributed transactions across multiple services.
AWS S3 is a scalable object storage service, while DynamoDB is a fully managed NoSQL database service provided by Amazon.

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