15 Spring boot interview questions & answers with tutorials for easy setup of new Spring applications. Spring boot helps you get started quickly with its auto-configuration ability, and Spring Cloud Microservices interview questions & answers extends Spring Boot with cloud & … Read more ›...
Spring framework interview questions are very common for the Java programmer jobs. This covers Spring framework beginner interview questions on the Spring core and more advanced Spring framework interview questions at Java microservices interview questions.
Q1. What do you understand by the terms Dependency Inversion Principle (DIP),
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Video: Spring DIP, DI, and IoC. This extends 13 Spring interview questions & answers.
Q1. What do you understand by the terms Dependency Inversion Principle (DIP), Dependency Injection (DI) and Inversion of Control (IoC) container?
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This tutorial extends Getting started with Apache Tomcat application server by deploying a simple JEE Application to introduce Spring MVC.
Spring dependencies via Maven
Step 1: Modify the pom.xml file in the simpleWeb project to bring in the Spring web dependency jars.
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This extends 13 Spring basics Q1 – Q7 interview questions & answers. Q8. Can you describe the high level Spring architecture? A8. A Spring Bean represents a POJO (Plain Old Java Object) performing useful operation(s). All Spring Beans reside within a Spring IoC Container. … Read more ›...
This extends 01: 15 Spring Boot interview Questions & Answers. Q1. What is a Swagger in Spring Boot? A1. Swagger is an open source set of rules, specifications and tools for developing and describing RESTful APIs. … Read more ›...
This tutorial extends Spring MVC beginner tutorial step by step.
Maven project structure
Model class to capture login form details
Step 1: Create a POJO “Login.java” in the package “com.mytutorial.model” under “src/main/java”
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Q. How does hibernate support lazy loading? A. Hibernate uses a proxy object to support lazy loading. Basically as soon as you reference a child or lookup object via the accessor/getter methods, if the linked entity is not in the session cache (i.e. the first-level cache), … Read more ›...
NonUniqueObjectException is thrown when there is an object already associated with the session with the same id (primary key) (i.e. a duplicate). It is important to understand the concept of a “detached” object in Hibernate. This is one of the most common errors, understanding why and when this error is thrown will save you time in identifying and fixing this issue.
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Q1. What are the core annotations used in a Spring Boot applications? A1. Annotations are used to configure & customize a Spring boot application. @SpringBootApplication This is a core class level annotation that marks the main class of a Spring Boot application, … Read more ›...
This tutorial extends Spring MVC form submission tutorial step by step. This tutorial gets rid of web.xml and applicationContext.xml files.
pom.xml changes
Step 1: Add “JSTL” (i.e. JSP Standard Tag Library ) jar dependency,
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Q1. Does Spring dependency injection happen during compile time or runtime? A1. Runtime during creating an object. Q2. What is the difference between prototype scope and singleton scope? Which one is the default? A2.Singleton means single bean instance per IoC container, … Read more ›...
LazyInitializationException is thrown when an object becomes detached, and if you try to access associated (i.e. proxied) object(s) of a detached object.
Q. What is a detached object in Hibernate?
When you close an individual Hibernate Session, the persistent objects you are working with are detached.
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