EJB Online Test

Q: What topics are covered in the EJB Online Test?

EJB体系结构 企业豆 会话豆 消息驱动的豆 容器管理的持久性 豆类管理的持久性 EJB安全 EJB交易 EJB计时器服务 拦截器

About the test:

EJB在线测试使用基于方案的多项选择问题来评估候选人与EJB基础知识，会话豆和消息驱动的豆，容器管理的交易和安全性，EJB设计模式和最佳实践，分布式的缓存和聚集的知识和技能，并将EJB与其他Java技术集成，例如Java Persistence API（JPA）和Java消息服务（JMS）。该测试旨在评估候选人在EJB方面的熟练程度及其使用Java构建强大而可扩展的企业应用程序的能力。

Covered skills:

EJB体系结构
会话豆
容器管理的持久性
EJB安全
EJB计时器服务

企业豆
消息驱动的豆
豆类管理的持久性
EJB交易
拦截器

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9 reasons why

Adaface EJB Test is the most accurate way to shortlist Java开发人员s

Reason #1

Tests for on-the-job skills

The EJB Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

了解企业Java Bean的架构
实施和管理会话bean
创建和利用消息驱动的豆
了解EJB中容器管理的持久性
在EJB中实施豆类管理的持久性
在EJB应用程序中管理安全性
使用EJB交易
利用EJB计时器服务
在EJB中实施拦截器
设计和实施EJB应用程序

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

这些只是我们库中有10,000多个问题的一个小样本。关于此的实际问题 EJB（企业Java Bean）测试将是不可行的.

🧐 Question
Easy Custom Exception Exception Handling Custom Exceptions	Try practice test
What does the following code output?
Hard Holding References	Try practice test
What does the following Java code output?
Medium Abstract Interface OOPs Interfaces	Try practice test
Given following interface: Which of these are correct classes?
Medium Garbage Collection Garbage Collection	Try practice test
After which line is "bs" object, created on Line 4, eligible for garbage collection?
Hard Static Init Blocks OOPs	Try practice test
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H

	🧐 Question	🔧 Skill
	Easy Custom Exception Exception Handling Custom Exceptions	2 mins Java	Try practice test
What does the following code output?
	Hard Holding References	2 mins Java	Try practice test
What does the following Java code output?
	Medium Abstract Interface OOPs Interfaces	2 mins Java	Try practice test
Given following interface: Which of these are correct classes?
	Medium Garbage Collection Garbage Collection	2 mins Java	Try practice test
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Hard Static Init Blocks OOPs	2 mins Java	Try practice test
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Custom Exception Exception Handling Custom Exceptions	Java	Easy	2 mins	Try practice test
What does the following code output?
	Holding References	Java	Hard	2 mins	Try practice test
What does the following Java code output?
	Abstract Interface OOPs Interfaces	Java	Medium	2 mins	Try practice test
Given following interface: Which of these are correct classes?
	Garbage Collection Garbage Collection	Java	Medium	2 mins	Try practice test
After which line is "bs" object, created on Line 4, eligible for garbage collection?
	Static Init Blocks OOPs	Java	Hard	2 mins	Try practice test
What does the following code output? 1) G A B E D H 2) G B A D E H 3) G B A D E H C F 4) C F G A B E D H 5) C F G B A D E H 6) G C F A B E D H 7) G C F B A D E H

Reason #4

1200+ customers in 75 countries

借助 Adaface，我们能够将初步筛选流程优化达 75% 以上，为招聘经理和我们的人才招聘团队节省了宝贵的时间！

Brandon Lee, 人事主管, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment EJB（企业Java Bean）测试 in your hiring process is that it is an elimination tool, not a selection tool. In other words: you want to use the test to eliminate the candidates who do poorly on the test, not to select the candidates who come out at the top. While they are super valuable, pre-employment tests do not paint the entire picture of a candidate’s abilities, knowledge, and motivations. Multiple easy questions are more predictive of a candidate's ability than fewer hard questions. Harder questions are often "trick" based questions, which do not provide any meaningful signal about the candidate's skillset.

Science behind Adaface tests

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the EJB（企业Java Bean）测试 from your dashboard by entering their email address.

Public link: You can create a public link for each test that you can share with candidates.

API or integrations: You can invite candidates directly from your ATS by using our pre-built integrations with popular ATS systems or building a custom integration with your in-house ATS.

Reason #7

Detailed scorecards & benchmarks

查看样本记分卡

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

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About the EJB Assessment Test

Why you should use Pre-employment EJB Online Test?

The EJB（企业Java Bean）测试 makes use of scenario-based questions to test for on-the-job skills as opposed to theoretical knowledge, ensuring that candidates who do well on this screening test have the relavant skills. The questions are designed to covered following on-the-job aspects:

对EJB体系结构的理解
与企业豆一起工作
会话豆的实施
利用消息驱动的豆
实施容器管理的持久性
管理豆管理的持久性
EJB安全知识
使用EJB交易
利用EJB计时器服务
实施拦截器

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the EJB Online Test?

企业bean
企业豆是企业豆的组成部分实现企业应用程序业务逻辑的EJB体系结构。他们封装了应用程序的数据和行为，并为客户提供服务。在测试中测量了该技能，以评估候选人有效地设计和实施企业豆的能力。
会话bean
会话bean是一种代表代表业务逻辑的企业bean类型特定的客户。他们代表客户执行操作，并且在多个客户中没有共享。在测试中测量了该技能，以评估候选人在开发和管理会话bean方面的熟练程度，这对于实施企业应用程序的核心功能至关重要。
消息驱动的bean
消息 - 驱动的豆类是一种企业豆，可以在EJB体系结构中进行异步通信。他们聆听来自消息系统的消息，并根据接收到的消息执行操作。在测试中测量了该技能，以评估候选人对消息驱动的豆的理解及其在企业应用程序中实施异步消息传递的能力。
容器管理的持久性
容器管理持久性是EJB容器提供的一种机制来管理实体豆的持续存储。它会自动处理数据库操作，例如存储，检索和更新数据。在测试中测量了该技能，以评估候选人对容器管理的持久性的了解及其在持久存储中设计和实施实体豆的能力。
bean管理的持久性
bean-托管持久性是容器管理的持久性的替代方法，其中EJB开发人员手动处理实体bean代码中的数据库操作。在测试中测量了这项技能，以评估候选人对豆类管理的持久性的理解及其在实体bean中实施自定义持久性逻辑的能力。
EJB Security
EJB安全性与确保确定基于角色和权限的EJB组件访问。它确保只有授权用户才能在企业豆上调用特定方法。在测试中测量了该技能，以评估候选人对EJB安全机制的了解及其在企业应用程序中实施安全访问控制的能力。
EJB Transactions
EJB Transactions提供了可靠的和可靠的在企业应用程序中管理数据完整性的一致方法。他们确保一组数据库操作都成功或全部失败。在测试中测量了该技能，以评估候选人对EJB交易的理解及其在企业豆中实施交易行为的能力。
EJB计时器服务
EJB计时器服务企业豆内的基于时间的事件。它可以以特定的间隔或在某个时间点执行任务。在测试中测量了此技能，以评估候选人在企业应用程序中使用EJB计时器服务实施计划任务和基于时间的操作的能力。
interceptors
interceptor截取方法调用并在执行被拦截方法之前和之后执行其他操作的EJB体系结构。它们提供了可以应用于多个EJB组件的横切功能。在测试中测量了这项技能，以评估候选人对拦截器的理解及其应用拦截器以增强企业豆行为的能力。
Full list of covered topics
The actual topics of the questions in the final test will depend on your job description and requirements. However, here's a list of topics you can expect the questions for EJB（企业Java Bean）测试 to be based on.
EJB体系结构
EJB组件
EJB生命周期
状态的会话豆
无状态会话豆
Singleton Session Bean
消息驱动的豆
JMS
激活配置
容器管理的持久性
实体豆
豆类管理的持久性
主键
关系
EJB安全
身份验证和授权
角色和权限
编程安全性
交易
本地与全球交易
容器管理的交易
豆类管理的交易
事务属性
隔离水平
EJB计时器服务
计时器
基于日历的计时器
基于间隔的计时器
拦截器
拦截器类
拦截器方法
拦截生命周期
EJB设计模式
单例图案
工厂模式
立面模式
代理模式
服务定位器模式
传输对象模式
数据访问对象模式
业务代表模式
复合实体模式
传输对象组装器模式
服务激活器模式
应用服务模式
业务对象模式
实体抽象模式
异步服务模式
DAO工厂模式
价值清单处理程序模式
业务界面模式
传输对象模式
缓存模式
会话外墙模式
演示层设计模式
服务存根模式
刻板印象注释设计模式
依赖注射模式
线程本地模式
功能委托模式

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What roles can I use the EJB Online Test for?

Java开发人员
应用程序开发人员-EJB

How is the EJB Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like