MPMihai Popescuinjavainterviewprep.hashnode.dev·Mar 4, 2025 · 5 min readDatabases as a Java developerJPA (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...00
MPMihai Popescuinjavainterviewprep.hashnode.dev·Feb 7, 2025 · 3 min readRandom interview preparation subjectsJPA 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...00
MPMihai Popescuinjavainterviewprep.hashnode.dev·Feb 3, 2025 · 8 min readMost Used Coding exercisesMany 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 ...00
MPMihai Popescuinjavainterviewprep.hashnode.dev·Jan 21, 2025 · 3 min readSystem Design Concepts for Full-Stack Java Developers1. 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...00
MPMihai Popescuinjavainterviewprep.hashnode.dev·Dec 28, 2024 · 2 min readJava StreamsJava 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...00
