advancedJPA & Hibernate Internals259 of 469
Design a product API supporting category filtering, price sorting, pagination, JPA Specification/Criteria filtering, and invalid-parameter exception handling
Tests whether you reach for JPA Specifications to compose optional filters dynamically (rather than branching native queries per filter combination), use Pageable for sorting/pagination, and validate parameters at the boundary so a bad filter value fails fast with a clear 400 instead of a confusing query error.
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