Maven Interview Questions

Q: What are the steps involved in project deployment?

There are several steps to follow while implying project deployment in Maven. These steps include:

1. Go through all the projects and analyze the code that is working in the background in progress in the source code repository and identifies it.

2. In order to get the project development, one need to download the whole source code from the Social Venture Network.

3. Construct or develop the application in the system

4. It needs to be saving as a War or Jar file system.

5. Get the specified file from the location path and move that specific file to create a site.

6. The application that is created in the system needs to be updated with the latest version with date and version number.

 Q: How many project types available in Maven to choose from?

There is more than thousand Java project as there are templates, skeleton provided to you by Maven so that you do not have to remember a basic configuration detail or a basic setup of that particular type of project which Maven is going to give it to you. It includes examples like basic Java project, Spring Project, Spring MVC, Spring Web Flow, and Spring Boot.

Q: What is the Projected Oriented Build in Maven?

Maven tools are build on the model as POM i.e. Project Object Model. Supports single-inheritance tree like Java.

Defined as XML in pom.xml

Every pom extends the super POM

Q: What is Maven Archetypes? And what are the Project Types?

Archetypes are templates to create a variety of Java project structures, including web applications specific to a container such as Wildfly. In other words, it is a tool that creates the stuff you build the project on top of.

 Project Types:

1.   War

2.   Jar

3.   Ear

4.   Wildfly

5.   JMS

6.   Android 

Q: How many repositories are there in Maven?

There are three types of repository present in Maven. This includes Local Repository, Central Repository, and Remote Repository.

Local Repository- This local repository is located on your local system and it works when you run a maven command. Maven local repository command is %USER_HOME%/.m2 directory.

Central Repository- Installation from the repository is performed on creating a project from archetype or resolving the dependency.

Remote Repository- This repository is located on the web. It is just a network accessible location that Maven downloads dependencies from. All the artifacts that remote repository contains are open source.

Q: Why should one use Maven?

 It helps to setup project very quickly and it avoids complicated build files like build.xml. Maven required files like POM.xml; it serves the purpose for Maven only. POM.xml is a collection of dependencies of your Java Project which one can specify to Maven and then Maven will download all of them from the internet and then store it to some repository i.e. local repository, central repository, and remote repository.

It helps to not bundle all the jars in your package i.e. in your War file or Ear file because all of them are going store in the repository and wherever you install this application that repository will be used for any dependencies look up. So, your Jar file, War file or Ear file or your bundle deployment will be very light.

 

Q: What is the sequence in which Maven searches for dependency libraries?

You can locate dependency in the local repository system of your software. Sometimes, it is difficult to locate or identify in the local repository. So, I can find or look in the central repository system and if it shows the dependency missing then one can look in remote repository to find the dependency. If it still shows the same thing repeatedly then the system will show error in finding the dependencies. And if the dependencies are found in the local repository then it will be automatically downloaded in the central repository for future use.

 

Q: What are the things you need to define for each external dependency?

External Dependency plays an important part in the Maven software. It is an internal part of the system without which dependency cannot be located in a system. To specify the external dependency we need:

1. It requires a group ID duplicate to the library name.

2. It requires an artifact ID duplicate to the library name.

3. Mentioning of dependency scope in the system

4. Have to mention the system route corresponding to the project position.

 Q: What is the Maven Lifecycle? Lifestyle executed in term of phases:

1. Maven Steps through phases.

2. Execution defined in terms of plugin goals.

3. Execution associated with phases.

4. Lifecycle completes when all phase executes successfully.

 Q: What are the archetype goals?

Four goals associated with archetype plugin:

Create - creates using a quick-start template. Generate – provide a menu of templates.

Create-from-project – creates an archetype from an existing project. Crawl – searches the repository for archetype and updates catalog.