So, in essence, “boilerplate configuration” in Spring refers to the repetitive, largely unchanged setup code that developers had to write in every project. This code was necessary but didn’t directly contribute to the unique aspects of each application. Spring Boot was created to eliminate this boilerplate, allowing developers to focus more on writing the code […]
Question: How can you print the elements of a matrix in a spiral Order? Answer: This Question is available in Leetcode Spiral Matrix https://leetcode.com/problems/spiral-matrix/description/ The Common Mistake The common mistake occurs in the third and fourth for-loops of the code, where we are supposed to traverse the matrix in reverse order. The condition in these […]
In Spring Boot applications that use the Java Persistence API (JPA) for database access, the @EnableJpaRepositories annotation plays a crucial role in enabling and configuring JPA repositories. Let’s dive into what this annotation does and how it relates to the @SpringBootApplication annotation. Understanding JPA Repositories JPA repositories are interfaces that extend the JpaRepository interface provided […]
In the world of Java Persistence API (JPA), the mappedBy attribute plays a crucial role when defining bidirectional relationships between entities. To fully grasp the importance of mappedBy, we must first understand the concept of owning a relationship and related terms. Owning the Relationship In a bidirectional relationship, both entities have a reference to each […]
Introduction In this blog post, we will explore two key annotations used in Java Persistence API (JPA): @Entity and @Table. We will discuss what they are, how they work, and when to use each one. What is the @Entity Annotation? The @Entity annotation is used to mark a Java class as an entity, meaning that […]
Introduction In this blog post, we will explore two key fetching strategies used in Java Persistence API (JPA): FetchType.EAGER and FetchType.LAZY. We will discuss what they are, how they work, and when to use each one. What is FetchType.EAGER? FetchType.EAGER is a FetchType option in JPA that enables eager loading of data. This means that […]
Introduction In this blog post, we will explore two key technologies used in Java applications for interacting with databases: the Java Persistence API (JPA) and Hibernate. We will also discuss how these technologies are used in a Spring Boot application. What is JPA? The Java Persistence API (JPA) is a specification for object-relational mapping (ORM) […]
Spring Framework is built on the principle of Inversion of Control (IoC) and Dependency Injection (DI). One of the core features of Spring is its ability to manage the lifecycle of objects using annotations. Three of the most commonly used annotations in Spring are @Component, @Service, and @Repository. While they all serve the purpose of […]
Question: what is a microservices architecture from your perspective? Question : Why do you need an object relational mapper when working with databases? Object relational mapper? An Object-Relational Mapper (ORM) is a code library that provides a way to map object-oriented programming languages to relational databases. The main reasons why you need an ORM when working […]
Certainly! Here are the interview questions rephrased in a clear format: These questions cover a range of topics from design principles and array manipulation to concurrency and exception handling in Java and Spring Boot. If you need detailed answers or code examples for any of these questions, please let me know!