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Spring Boot Interview questions
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It is done in the following steps.
Step 1 -
The first step to connect the database like Oracle or MySql is adding the dependency for your database connector to pom.xml.
Step 2 -
The next step is the elimination of H2 Dependency from pom.xml
Step 3 -
Step 3 includes the schema and table to establish your database.
Step 4 -
The next step is configuring of the database by using Configure application.properties to connect to your database.
And the last step is to restart your device and your connection is ready to use.
JPA is a specification/Interface whereas Hibernate is one of the JPA implementations.
Aspect Oriented Programming (AOP) supplements Object-Oriented Programming (OOP) by giving another mindset about program structure. The key unit of measured quality in OOP is the class, while in AOP the unit of particularity is the viewpoint. Angles empower the modularization of concerns, for example, transaction management that cut over numerous sorts and questions.
The reason behind to have Spring-boot-maven module is it gives a couple of charges which empower you to package the code as a container or run the application
- spring-boot: run operates your Spring Boot application.
- spring-boot: repackage it repackages your jug/war to be executable.
- spring-boot: start and spring-boot: stop to deal with the lifecycle of your Spring Boot application (i.e., for joining tests).
- spring-boot: build-data creates build data that can be utilized by the Actuator.
The Spring Initializer is a web application that can produce a Spring Boot project structure for you. It doesn’t create any application code. However, it will give you an essential project structure and either a Maven or a Gradle build specification to fabricate your code with. You should simply compose the application code.
Spring Initializer can be utilized a few different ways, including:
- An online interface.
- Via Spring Tool Suite.
- Using the Spring Boot CLI.
Spring boot accompanies Dev Tools, which is acquainted with increase the profitability of designer. You don’t have to redeploy your application each time you influence the changes. The developer can reload the progressions without restart of the server. It maintains a strategic distance from the agony of redeploying application each time when you roll out any improvement. This module will can’t be utilized in a production environment.
Starters are an arrangement of advantageous reliance descriptors that you can incorporate into your application. The starters contain a considerable amount of the dependencies that you have to get a task up and running rapidly and with a steady, supported a set of managed transitive conditions.
The starter POMs are helpful reliance descriptors that can be added to your application’s Maven. In another word, if you are building up a project that utilizes Spring Batch for batch preparing, you need to incorporate spring-boot-starter-bunch that will import all the required conditions for the Spring Batch application. This decreases the burden of looking at and designing all of the conditions required for a structure.
Spring Boot Actuator is a sub-task of Spring Boot. It adds a few creation review administrations to your application with little exertion on your part. There are also has numerous features added to your application out-of-the-case for dealing with the administration in a production (or other) condition. They’re basically used to uncover diverse kinds of data about the running application – health, measurements, information, dump, env and so on.
The configuration record utilized as a part of spring boot ventures is an application. Properties. This record is imperative where we would overwrite all the default designs. Regularly we need to hold this document under the assets envelope of the project.
It takes after “Opinionated Defaults Configuration” Approach to lessen Developer exertion. Because of the Opinionated perspective of spring boot, what is required to begin yet additionally we can get out if not appropriate for the application. Spring Boot utilizes sensible defaults, “opinions,” for the most part in light of the classpath substance.
Spring Boot gives different properties, which can be indicated in our project’s application. Properties record. These properties have default values, and you can set that inside the properties record. Properties are utilized to set qualities like a server-port number, database association configuration and much more.
The configuration file name, which is utilized as a part of spring boot projects is application.properties. This document is very important where we would overwrite all the default setups. Ordinarily, we need to hold this document under the assets folder of the project.
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