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About the test:

Java测试使用基于方案的和代码追踪问题来评估候选人对核心Java概念的了解,例如OOPS,类,例外,集合和高级主题,例如与线程和处理关系数据库的并发编程。该测试使用简单的Java编码问题来评估候选人在Java中编码的能力。

Covered skills:

  • Java语法和语义的基础
  • 面向对象的编程
  • Java数据结构(字符串;数组;对象)
  • 异常处理
  • 使用Lambdas&Streams API功能编程
  • 坚实的原则
  • Web应用程序编程的基础知识
  • 使用数据库
  • 集合框架
  • 多线程
  • 核心界面和实现(列表;集合; map)

9 reasons why
9 reasons why

Adaface Java在线测试 is the most accurate way to shortlist Java开发人员s



Reason #1

Tests for on-the-job skills

The Java在线测试 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Java语法和语义的基础
  • 使用Java创建Web应用程序
  • 在Java中应用面向对象的编程原理
  • 在Java中使用数据库
  • 操纵Java数据结构(字符串,数组,对象)
  • 利用Java收集框架
  • 有效处理Java中的异常和错误
  • 在Java中实现多线程
  • 使用Java中的Lambdas&Streams API应用功能编程概念
  • 了解Java中的核心接口和实现(列表,设置,地图)
  • 在Java开发中利用坚实的原则
Reason #2

No trick questions

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
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 Java在线测试 将是不可行的.

🧐 Question

Easy

Custom Exception
Exception Handling
Custom Exceptions
Solve
What does the following code output?
 image

Hard

Holding References
Solve
What does the following Java code output?
 image

Medium

Abstract Interface
OOPs
Interfaces
Solve
Given following interface:
 image
Which of these are correct classes?
 image

Medium

Garbage Collection
Garbage Collection
Solve
After which line is "bs" object, created on Line 4, eligible for garbage collection?
 image

Hard

Static Init Blocks
OOPs
Solve
What does the following code output?
 image
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

Easy

Registration Queue
Logic
Queues
Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount.
For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition.
⚠️⚠️⚠️ Note:
- The first line of the input is the length of the array. The second line contains all the elements of the array.
- The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function.
- You need to "print" the final result (not return it) to pass the test cases.

For the example discussed above, the input will be:
5
20 70 -40 30 -10

Your code needs to print the following to the standard output:
20 70 30 -40 -10

Medium

Visitors Count
Strings
Logic
Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. 
Example:

Input:
WWMMWWCCC

Expected Output: 
4W3C2M

Explanation: 
‘W’ has the highest count, then ‘C’, then ‘M’. 
⚠️⚠️⚠️ Note:
- The input is already parsed and passed to a function.
- You need to "print" the final result (not return it) to pass the test cases.
- If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’.
- If any of them have the same count, the output should follow this order - M, W, C.
🧐 Question🔧 Skill

Easy

Custom Exception
Exception Handling
Custom Exceptions

2 mins

Java
Solve

Hard

Holding References

2 mins

Java
Solve

Medium

Abstract Interface
OOPs
Interfaces

2 mins

Java
Solve

Medium

Garbage Collection
Garbage Collection

2 mins

Java
Solve

Hard

Static Init Blocks
OOPs

2 mins

Java
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Custom Exception
Exception Handling
Custom Exceptions
Java
Easy2 mins
Solve
Holding References
Java
Hard2 mins
Solve
Abstract Interface
OOPs
Interfaces
Java
Medium2 mins
Solve
Garbage Collection
Garbage Collection
Java
Medium2 mins
Solve
Static Init Blocks
OOPs
Java
Hard2 mins
Solve
Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

借助Adaface,我们能够优化我们的初始筛查过程超过75%,从而为招聘经理和我们的人才获取团队提供了宝贵的时间!


Brandon Lee, 人的负责人, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Java在线测试 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 Java在线测试 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.

invite candidates
Reason #7

Detailed scorecards & benchmarks

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.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the Java在线测试

Why you should use Java在线测试?

The Java在线测试 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:

  • Java语法和语义的基础
  • Web应用程序编程的基础知识
  • 面向对象的编程
  • 使用数据库
  • Java数据结构 - 字符串,数组,对象
  • 集合框架
  • 异常处理
  • 多线程

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 Java在线测试?

  • Java语法和语义的基础

    此技能涵盖了Java编程语言的基本构建块,包括变量,数据类型,操作员,控制结构和语法规则。必须衡量这项技能,以确保候选人对语言的核心概念有牢固的了解,并可以编写干净可靠的代码。

  • Web应用程序编程的基础知识

    此技能着重于使用Java开发Web应用程序的基础知识,包括HTTP请求处理,Servlet,JSP和MVC架构。评估此技能至关重要,因为它决定了候选人在Java中构建可扩展和高效的Web应用程序的能力。

  • 面向对象的编程

    面向对象的编程(OOP)是关键范式在Java中,强调对象,类,继承和多态性的使用。评估此技能对于评估候选人使用OOP原理设计和开发模块化和可扩展代码的能力至关重要。

  • 使用数据库

    此技能涉及如何使用Java了解如何与数据库进行交互,包括连接到数据库,执行SQL查询以及处理结果集。衡量这项技能以确保候选人可以有效存储,检索和操纵数据在数据库驱动的应用程序中。该技能涵盖了Java中的不同数据结构,包括字符串,数组和对象。评估这项技能很重要,因为它决定了候选人在有效地工作和操纵数据方面的熟练程度。

  • 收集框架

    Java中的集合框架提供了定义和操纵集合的接口和类别对象。衡量此技能对于评估候选人有效使用收藏的知识,例如列表,集合和地图,在解决各种编程问题时。 Java编程的关键方面涉及管理和应对错误和特殊情况。评估此技能有助于确定候选人正确处理异常并编写可靠且可靠的代码的能力。

  • 多线程

    此技能侧重于Java中的并行编程,包括创建和管理多个线程以实现并行执行。评估这项技能很重要,因为它决定了候选人对线程同步,资源共享和处理种族条件的理解。

  • 使用Lambdas&streams API api api

    使用功能性编程, Java中的概念,例如Lambda表达式和流API,用于对数据集合进行操作。衡量此技能对于评估候选人利用功能编程的能力来编写简洁和表达代码的能力至关重要。

  • 核心接口和实现(列表; set; set; map)

    技能涵盖了核心接口及其在Java中的实现,包括列表,集合和地图。评估这项技能对于评估候选人对使用这些基本数据结构的理解有效,有效。评估这项技能可以确定候选人对这些原则的了解,例如单个责任,开放/关闭,Liskov替代,接口隔离和依赖性反转,以及它们在设计强大而灵活的软件系统中的应用。

  • 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 Java在线测试 to be based on.

    变量
    数据类型
    操作员
    控制语句
    方法
    课程
    遗产
    多态性
    抽象
    封装
    servlets
    JSP
    Javaserver面孔(JSF)
    Java持久性API(JPA)
    冬眠
    SQL
    Crud操作
    数据库连接
    字符串操纵
    数组
    包装班
    数组列表
    LinkedList
    哈希图
    哈希集
    异常处理
    线程同步
    并发
    lambda表达式
    列表接口
    设置接口
    地图接口
    单一责任原则
    开放/关闭原则
    Liskov替代原则
    界面隔离原理
    依赖性反转原理
    Java I/O
    序列化
    单位测试
    记录
    仿制药
    注释
    国际化(I18N)
    设计模式
    垃圾收集
    联网
    反射
    Javafx
    安全

What roles can I use the Java在线测试 for?

  • Java开发人员
  • 后端Java开发人员
  • 高级Java工程师
  • 完整的堆栈开发人员
  • Java软件架构师
  • 技术领导

How is the Java在线测试 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

  • 使用Lambdas&Streams API功能编程
  • 核心接口和实现 - 列表,设置,地图
  • 坚实的原则
  • 爪哇的设计模式
  • 数据库优化和查询优化
  • 并发和同步

The coding question for experienced candidates will be of a higher difficulty level to evaluate more hands-on experience.

Singapore government logo

招聘经理认为,通过小组访谈中他们提出的技术问题,他们能够分辨哪些候选人的得分更好,并且与未得分的人有区别。他们是 非常满意 随着候选人的质量入围了Adaface筛选。


85%
减少筛查时间

Java在线测试 常见问题解答

Java在线测试将包括什么类型的问题?

该测试将有MCQ问题和编码问题。编码问题旨在评估动手Java编程经验。 MCQ问题是基于方案的,以评估在职技能,而不是仅仅是理论概念。

如何在单个就业前测试中测试多个与Java相关的技能?

我们的定制评估使您可以在一次测试中测试多个技能。例如,假设您正在寻找具有春季和SQL知识的Java开发人员。在这种情况下,我们自定义评估以评估测试中的所有三种技能。

Java角色需要什么技能?

根据角色和行业,Java开发人员可能需要这些技能:

  • 理解面向对象的编程概念
  • 了解何时使用设计模式,例如Singleton,Factory,Fly-Weight,Builder,Builder,Object池,迭代器,策略,访客,复合材料。这项技能对于必须研究应用程序长期解决方案的架构的高级Java开发人员尤其重要
  • 了解类加载过程以及类加载程序的工作方式
  • 对性能的细微差别世界的深入了解,无论是记忆开销,计算复杂性还是速度
  • 了解何时分配记忆,从什么上下文以及如何影响堆破碎
  • 熟悉各种垃圾收集算法,以及如何使用探测者
  • 具有JSP / Servlet的经验,Strut / Spring等网络框架和面向服务的体系结构 / Web服务 - SOAP / REST
  • 能够将最现代的模式和语言功能应用于现有系统
  • 在Java生态系统中使用技术的经验:Struts,Spring,Maven,Gradle,Ant,Ant,Junit,Spock和Hibernate等
  • 了解SQL查询的复杂性
  • 学习新技术和愿意走出舒适区以探索和学习新技能的能力

我可以将多个技能结合在一起,为一个自定义评估吗?

是的,一点没错。自定义评估是根据您的职位描述进行的,并将包括有关您指定的所有必备技能的问题。

您是否有任何反交换或策略功能?

我们具有以下反交易功能:

  • 不可解决的问题
  • IP策略
  • Web Protoring
  • 网络摄像头Proctoring
  • 窃检测
  • 安全浏览器

阅读有关[Proctoring功能](https://www.adaface.com/proctoring)的更多信息。

如何解释考试成绩?

要记住的主要问题是评估是消除工具,而不是选择工具。优化了技能评估,以帮助您消除在技术上没有资格担任该角色的候选人,它没有进行优化以帮助您找到该角色的最佳候选人。因此,使用评估的理想方法是确定阈值分数(通常为55%,我们为您提供基准测试),并邀请所有在下一轮面试中得分高于门槛的候选人。

我可以使用该测试的经验水平?

每个ADAFACE评估都是为您的职位描述/理想候选角色定制的(我们的主题专家将从我们的10000多个问题的图书馆中选择正确的问题)。可以为任何经验级别定制此评估。

每个候选人都会得到同样的问题吗?

是的,这使您比较候选人变得容易得多。 MCQ问题的选项和问题顺序是随机的。我们有[抗欺骗/策略](https://www.adaface.com/proctoring)功能。在我们的企业计划中,我们还可以选择使用类似难度级别的问题创建多个版本的相同评估。

我是候选人。我可以尝试练习测试吗?

不,不幸的是,我们目前不支持实践测试。但是,您可以使用我们的[示例问题](https://www.adaface.com/questions)进行练习。

使用此测试的成本是多少?

您可以查看我们的[定价计划](https://www.adaface.com/pricing/)。

我可以免费试用吗?

我刚刚搬到了一个付费计划。我如何要求自定义评估?

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40 min tests.
No trick questions.
Accurate shortlisting.
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