Java SpringBoot RestApi Interview Questions | Learnwell Technocraft Pune
Q1. Spring vs Spring Boot
A web application framework based on Java
Provides tools and libraries to create customized web applications
Spring is more complex than Spring Boot
Takes an unopinionated view
Used to create a Spring application project which can just run/ execute
Spring Boot is less complex than the Spring framework
Takes an opinionated view of a platform
Q2. What is Spring Boot and mention the need for it?
Spring Boot is a Spring module which aims to simplify the use of the Spring framework for Java development. It is used to a create stand-alone Spring-based applications which you can just run. So, it basically removes a lot of configurations and dependencies. Aiming at the Rapid Application Development, Spring Boot framework comes with the auto-dependency resolution, embedded HTTP servers, auto-configuration, management endpoints, and Spring Boot CLI.
Q3. Mention the advantages of Spring Boot ?
The advantages of Spring Boot are as follows:
Provides auto-configuration to load a set of default configuration for a quick start of the application
Creates stand-alone applications with a range of non-functional features that are common to large classes of projects
It comes with embedded tomcat, servlet containers jetty to avoid the usage of WAR files
Spring Boot provides an opinionated view to reduce the developer effort and simplify maven configurations
Provides CLI tool to develop and test applications
Comes with Spring Boot starters to ensure dependency management and also provides various security metrics
Consists of a wide range of APIs for monitoring and managing applications in dev and prod.
Integrates with Spring Ecosystem like Spring JDBC, Spring ORM, Spring Data, Spring Security easily by avoiding boilerplate code.
Q4. Mention a few features of Spring Boot
Few important features of Spring Boot are as follows:
Spring CLI – Spring Boot CLI allows you to Groovy for writing Spring boot application and avoids boilerplate code.
Starter Dependency – With the help of this feature, Spring Boot aggregates common dependencies together and eventually improves productivity
Spring Initializer – This is basically a web application, which can create an internal project structure for you. So, you do not have to manually set up the structure of the project, instead, you can use this feature.
Auto-Configuration – The auto-configuration feature of Spring Boot helps in loading the default configurations according to the project you are working on. In this way, you can avoid any unnecessary WAR files.
Spring Actuator – This feature provides help while running Spring Boot applications.
Logging and Security – The logging and security feature of Spring Boot, ensures that all the applications made using Spring Boot are properly secured without any hassle.
Q5. Mention the minimum requirements for a Spring boot System
Spring Boot 2.1.7.RELEASE requires
Explicit build supportMaven 3.3+
Servlet Container SupportTomcat 9.0 – Servlet Version 4.0
Jetty 9.4 – Servlet Version 3.1
Undertow 2.0 – Servlet Version 4.0
A web service is a collection of open protocols and standards used for exchanging data between applications or systems. Software applications written in various programming languages and running on various platforms can use web services to exchange data over computer networks like the Internet in a manner similar to inter-process communication on a single computer.
REST stands for Representational State Transfer. It relies on a stateless, client-server, cacheable communications protocol -- and in virtually all cases, the HTTP protocol is used. It is an architecture style for designing networked applications.It is a lightweight alternative to Web Services and RPC. REST design operations are self-contained, and each request carries with it (transfers) all the information (state) that the server needs in order to complete it.
Q8.What are the HTTP methods used in REST for CRUD operation?
Following well known HTTP methods are commonly used in REST based architecture:
GET : Provides a read only access to a resource.
PUT : Used to create a new resource.
DELETE : Used to remove a resource.
POST : Used to update a existing resource or create a new resource.
OPTIONS : Used to get the supported operations on a resource. [Read More]
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