Java Spring Test - Online Test for Recruitment to hire top talents

Mercer | Mettl's Java Spring Test evaluates a candidate’s proficiency in Java Spring Framework and knowledge of different Java concepts.

What is inside this Java Spring Test?

This sixty-minute test includes fifteen MCQs and one coding problem to be solved using the coding simulator. Designed by subject matter experts, the assessment evaluates skills on three levels - basic, intermediate and advanced. This test has been holistically designed to assess an applicant's knowledge and applied coding skills.

What skills does this Java Spring Test cover?  

• Spring  

This subskill evaluates the following in Core Java: Application skills in Annotation Based Configuration, Event Handling and Beans. Analysis skills in AOP, Test, Beanfactory and Beans.  

• Java Basics  

This subskill evaluates the following in Core Java: Strings and String Methods, Flow of Control, Operators, Interfaces and Inheritance and Constants Variables and Data Types.  

• Hands-on programming  

This back-end simulator-based test evaluates a candidate's applied coding skills.

What roles can you assess using this Java Spring Test?  

• Java Spring developer  
• Java Spring application developer  
• Junior Java Spring developer

Sample questions with answers

1. What is the AOP module?

The AOP module is for developing aspects of Spring-enabled application. The AOP Alliance supports the interoperability between Spring and other AOP frameworks. 

2. Define object/relational mapping integration module.  

Spring supports the use of an object/relational mapping (ORM) tool over straight JDBC by offering the ORM module. Spring provides support to tie into various popular ORM frameworks, including Hibernate, JDO, and iBATIS SQL Maps. Spring’s transaction management supports these ORM frameworks as well as JDBC.  

3. Explain the Spring configuration file. 

Spring configuration file is an XML file. This file includes class information and explains how these classes are configured and introduced to each other.  

4. How can one use Spring to create a Restful Web Service returning JSON response? 

Any Spring @RestController in a Spring Boot application should render JSON response by default as long as Jackson2 is on the classpath. 

5. What is Dependency Injection in Spring? 

Dependency Injection is an aspect of Inversion of Control (IoC). This is a general concept and can be expressed in many ways. This concept states that one does not create objects but describes how they should be created. One does not directly connect the components and services in code but describes which services are needed by which components in a configuration file. A container (the IOC container) is then responsible for hooking it all up. 

6. What does a Spring Bean definition contain?   

 A Spring Bean definition contains all configuration metadata that is required for the container to know how to create a bean, its lifecycle details and its dependencies.  

7. What is bean wiring? 

Bean wiring is the case when beans are combined within the Spring container. When wiring beans, the Spring container requires to know what beans are needed and how the container should use dependency injection to tie them together. 

8. How does one turn on annotation wiring? 

To use annotation-based wiring, one must enable it in the Spring configuration file by configuring <context:annotation-config/> element. 

9. How can JDBC be used more efficiently in the Spring framework? 

JDBC can be used more efficiently with the help of a template class provided by the Spring framework, which is the JdbcTemplate. In the Spring JDBC framework, the burden of resource management and error handling is reduced. The developers only need to write queries and statements to get the data to and from the database. 

10. What is the Spring MVC framework? 

Spring comes with a full-featured MVC framework to build web applications that can be integrated with other MVC frameworks, such as Struts. Spring’s MVC framework uses IoC to offer a clean separation of controller logic from business objects. It permits declaratively binding request parameters to business objects.