Hibernate / EclipseLink Interview questions
What is EclipseLink SDO?
SDO (Service Data Objects) is a data programming model, implemented by EclipseLink, for working with loosely-typed, dynamic data structures rather than statically-typed Java entity classes. It's designed for service-oriented architectures where data shapes can change or aren't known precisely at compile time.
Where a JPA entity is a fixed Java class with declared fields, an SDO DataObject behaves more like a dynamic property bag, letting code read and set named properties without a corresponding compiled class existing for that exact shape. This trades compile-time type safety for flexibility, which is useful when integrating with services whose data contracts evolve independently of any single consuming application.
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