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Mar 4, 2025 · 5 min read · JPA (Java Persistence API) Basics JPA is a specification for ORM (Object-Relational Mapping) in Java. Common implementations: Hibernate, EclipseLink, OpenJPA. Core annotations: @Entity – Marks a class as a database entity. @Id – Specifies the pr...
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Feb 7, 2025 · 3 min read · JPA Repository: What It Is Used For and Main Features What is JPA Repository? JpaRepository is a part of Spring Data JPA, which provides a convenient way to interact with a relational database using JPA (Java Persistence API). It extends PagingAndSor...
Join discussionFeb 3, 2025 · 8 min read · Many coding problems in interviews are variations of common problem patterns. Recognizing these patterns and their solutions can help you solve many problems efficiently. Below is a breakdown of common problem categories similar to Two Sum and their ...
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Jan 21, 2025 · 3 min read · 1. Key Goals of System Design Scalability: The system's ability to handle increased load by adding resources. Includes vertical scaling (more power to a single node) and horizontal scaling (adding more nodes). Reliability: Ensures the system contin...
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Dec 28, 2024 · 2 min read · Java Streams are part of the java.util.stream package introduced in Java 8. They provide a way to process sequences of data in a functional programming style. Streams can be used to perform operations like filtering, mapping, and reducing on collecti...
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