Details on this page are a little bit different than at other pages. Rather than going through some theoretical or practical way of learning Spring & Hibernate frameworks, we will test our understanding of Spring & hibernate via solving multiple choice questions (MCQs). In this page, we will talk about 'MCQ on Spring and Hibernate'. Answer & Explanation of each question are given at the bottom of this page. These questions are newly introduced on the web for the first time, having been created with significant effort. You may also find these questions in some other websites/blogs after publishing this page. Someone who likes the questions & interested in copying the questions can just provide a reference of this page as a
What is Java JSON
Almost every Java developer come across the word 'JSON' during project development. In fact, not only the Java developer, but also other language developers, even UI developers. Almost everyone in the software industry directly or indirectly, sooner or later get a chance to work with JSON. Now you can imagine how important it is to know in & out of it. You may have a question in your mind 'What is Java JSON' and 'How to work with JSON in Java?'. Although its syntax is very easy to write, but sometimes it creates confusion when an object is a bit complex. You must require knowledge of it when you test your application by sending or receiving JSON data. Moreover, it also
Types Of NoSQL Databases and Examples
As a Java developer, we can’t develop an insightful application without the use of a database software. Traditionally, we use a relational database to work with an application. Of course, a relational database is a structured database and contains multiple tables to maintain meaningful relations between them. Additionally, it uses SQL like queries to operate with data stored in the tables. In contrast, suppose we have to work with a large amount of unstructured data which is not advantageous to store in the form of tables, keeping other factors in mind as well, then how will we store our data? The simple answer is ‘we should use NoSQL database’ in that case. Further, you might even have some other questions in
How To Add JDK 20 Support In Eclipse
Eclipse not recognizing Java-20, How to add JDK 20 support in Eclipse 2023-03?, jdk20 IDE , jdk20 eclipse, eclipse jdk20, eclipse java 20, java 20 eclipse, eclipse java 20 support, eclipse for java 20, JDK 20 support in Eclipse 2023-03 - java, add java 20 to eclipse, how to add java 20 to eclipse, eclipse openjdk 20, eclipse java 20 plugin, eclipse support java 20, jdk 20 eclipse, eclipse compiler compliance level 20 not available, sts java 20, add jdk 20 to eclipse, how to add jdk 20 in eclipse Oracle has released JDK 20 (the eleventh six-month release) in March, 2023 and it's general availability date is 2023/03/21. JDK 20 will be a short-term feature release that is supported for
How to Implement Feign Client in Spring Boot Microservices?
When two web applications communicate with each other for data exchange, they work on Producer-Consumer technique. An application who produces data is known as a Producer/Provider application. Similarly the one who consumes data is known as Consumer application. As a Java developer, we might be very familiar with REST API for Producer application whereas RestTemplate for Consumer application. With Microservices based application also, two Microservices communicate with each other and follow the Producer-Consumer model. Here, in consumer side, we use a concept 'Feign Client' as a better option instead of RestTemplate in order to minimize our effort of coding. Therefore, our topic of discussion is 'How to Implement Feign Client in Spring Boot Microservices?'. Apart from consuming REST services in an
Sealed Classes and Interfaces In Java
Java has transformed remarkably over the years, introducing new features and enhancements to make the language more robust and secure. One such feature introduced in Java 15 as a preview is the 'sealed' keyword for classes and interfaces. It was included in Java 17 as a final feature. Sealed classes and interfaces provide improved control over the inheritance hierarchy. In this article, we will explore sealed classes and interfaces in Java, including their syntax, rules, code examples, and related concepts. What is a sealed keyword in Java? In Java, the sealed keyword is used to control and restrict the inheritance hierarchy of classes and interfaces. It allows us to specify which classes or interfaces are allowed to extend or implement a particular
logback xml Configuration Examples
When it comes to implementing Logging feature in our application, especially in Spring Boot based applications, Logback comes into the picture. Typically, logback comes in the form of XML file (logback.xml) for the developers to use. It provides a powerful, responsive, and reliable solution in configuring the application's logging. It ensures consistent and customizable logging behavior, simplify maintenance, and offers dynamic adjustments. All of them are crucial for effective application monitoring, debugging, and troubleshooting. Logback is an open-source project with a strong engagement to reliability and robustness. Logback offers a broad range of configuration options through logback.xml, allowing us to customize our logging setup to accurately match our application's requirement. We can control log levels, formats, destinations, and filtering rules. It
How To Migrate Spring Boot 2 To Spring Boot 3
After going through the major highlights of 'New Features in Spring Boot 3.0, it's time to check the process of Spring Boot 3 Migration ('How To Migrate Spring Boot 2 To Spring Boot 3'). Here in this article we will be talking about the step by step migration process to Spring Boot 3. Before getting into to the spring boot 3 migration process, you should go through any documentation to understand the important artifacts in the same. It always helps in minimizing any potential risk factor in the process. Let's start discussing 'How To Migrate Spring Boot 2 To Spring Boot 3'. How To Migrate Spring Boot 2 To Spring Boot 3? Let's go through step by step spring boot 3 migration
Java 8 Features
Java 8 was released by Oracle after 2 Years 7 Months 18 Days of release of java 7 on March 18th, 2014. However, after Java 1.5 version, Java 8 is the next major release version. Before Java 8, Sun community focused majorly on objects, but in Java 8 version, Oracle community has focused more on functional programming to bring its benefits to the Java language. However, it doesn’t mean that Java is a functional oriented programming language, but we should grasp it in a way that we can apply functional aspects of programming as well now with Java 8. It is a part of Java 8, as an object oriented programming. Here, we will discuss new Java 8 Features one by
Logger In Spring Boot
We often pay very less attention on the implementation of logging during the development phase of an application. On the other hand, it becomes mandatory when we deploy the application in production. Sometimes we just insert 'System.out.println' statements as a shortest path, which is a bad practice in the production level applications. Logging serves as a crucial tool for developers providing insights into the inner workings of an application. It also assists in diagnosing issues, and helping in the overall monitoring and maintenance of the software. In this article, we will learn logger in Spring Boot and related concepts with extensive amount of examples. What is a Log? In software development, "log" represents a report containing the history of events, activities, or messages
