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About the test:

JavaScript,HTML/CSS和React测试使用基于方案的MCQ来评估候选者的JavaScript编程语言,HTML/CSS标记和React库的熟练程度。该测试评估了候选人对DOM操纵,事件处理,组件生命周期,州管理,道具和渲染以及CSS样式等主题的理解。评估了候选人的使用能力,可以使用这些技术解决现实世界中的问题并开发响应迅速且交互式的Web应用程序。

Covered skills:

  • JavaScript基础知识
  • JS糟糕
  • 异步node.js和承诺
  • 反应成分生命周期
  • CSS框型号
  • 响应迅速的CSS
  • JS ES6
  • 处理API
  • 用JSX建造组件
  • React钩子和功能组件
  • Flexbox和网格布局
  • JavaScript编程

9 reasons why
9 reasons why

Adaface JavaScript, HTML/CSS & React Test is the most accurate way to shortlist 完整的堆栈开发人员s



Reason #1

Tests for on-the-job skills

The JavaScript, HTML/CSS & React 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:

  • 有效处理异常和错误的能力
  • 精通ES6语法和概念
  • 理解JavaScript中面向对象的编程原理
  • 了解与API和处理异步操作的知识
  • 使用JSX建立组件的经验
  • 熟悉React组件生命周期
  • 熟练使用React钩子和功能组件
  • 了解CSS框模型及其应用
  • 熟练创建响应CSS设计
  • 强大的JavaScript编程技能
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 JavaScript,HTML/CSS和React测试 将是不可行的.

🧐 Question

Medium

Async Await Promises
Promises
Async-Await
Solve
What will the following code output?
 image
A: 24 after 5 seconds and after another 5 seconds, another 24
B: 24 followed by another 24 immediately
C: 24 immediately and another 24 after 5 seconds
D: After 5 seconds, 24 and 24
E: Undefined
F: NaN
G: None of these

Medium

Bitcoin prices
Axios
Promises
Solve
Review the following JavaScript code and pick the correct options: 
 image
Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?

Medium

My Module
Scope
Solve
What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
Solve
What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
Solve
What does the following JS code output?
 image

Easy

Background Properties
Solve
Consider the following shorthand CSS example:

background: #f7f7f7 url(jolie.jpg) no-repeat scroll 0px 0px;

Which of the following show the individual background properties represented by the shorthand:
 image

Easy

Colorful sentences
Solve
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be?
 image
A: Sentence 1 will be gray, Sentence 2 will be pink.
B: Both sentences will be gray.
C: Sentence 1 will be pink, Sentence 2 will be gray.
D: Both sentences will be pink.
E: The code does not make sense; will throw an error.

Easy

Links
Solve
In the following HTML, what will be the color of link with class "mark"
 image

Medium

Let's Hack
CSS Property
Solve
Consider the following HTML and CSS:
 image
 image
Which additional CSS rule(s) will render the following image? Choose ALL that apply.
 image
A:
div{
  flex-direction : column;
  align-items : center;
}
B:
div{
  flex-direction : row;
  align-items: center;
}
C:
div{
  flex-direction: column;
  justify-content: center;
}
D:
div{
  flex-direction: row;
  justify-content: center;
}

Hard

Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State
Solve
Review the following React code:
 image
Pick the correct statements:

A: The code renders 10 INDIAN RUPEE
B: The code renders 10 SINGAPORE DOLLAR
C: The code does not render anything and throws an error since JavaScript objects are not valid as React children
D: When the currency portion is clicked, the parent component is re-rendered
E: When the currency portion is clicked, parent component will skip the re-render because shouldComponentUpdate returns false
F: Parent component can be converted to a functional component with memoization (useMemo or memo) to avoid the re-render

Medium

Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling
Solve
Consider a React functional component that utilizes various hooks and conditional rendering. The component is designed to fetch and display a list of items from an API, with the ability to filter the list based on user input. Here's the pseudo-code structure:
 image
In this component, which of the following is a potential issue or inefficiency?
A: The component will re-render excessively due to the `setFilter` call.
B: The `useEffect` hook will run on every render, causing performance issues.
C: The `fetchItems` function may cause a memory leak if the component unmounts during the fetch.
D: The `useMemo` hook for `filteredItems` is unnecessary and can be removed without impact.
E: The component will fail to display items when the filter is cleared.
F: There are no significant issues; the component is implemented optimally.

Medium

Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization
Solve
Which of the following React code snippets
- triggers the reducer ‘rhymeReducer’ to update the ‘song’ value to ‘Jack and Jill’
- renders the updated ‘song’ value
- does not produce any errors/warnings
 image
 image

Hard

State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling
Solve
Consider a React application where a custom hook `useComplexState` is defined to manage a complex state object. The application also uses the Context API to pass down the state and dispatch function. Below is the pseudo-code for the custom hook and a component using it:
 image
Given this setup, which of the following statements best describes the potential issue or challenge with `MyComponent`?
A: The component will not re-render when the global state changes.
B: The `fetchData` function will cause an infinite loop of re-renders.
C: The component will lose its state when the global state updates.
D: There will be a memory leak due to improper cleanup in `useEffect`.
E: The `dispatch` function from `useComplexState` will conflict with the global dispatch.
F: There is no issue; the component is implemented correctly.

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

Medium

Async Await Promises
Promises
Async-Await

2 mins

JavaScript
Solve

Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
Solve

Medium

My Module
Scope

2 mins

JavaScript
Solve

Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
Solve

Easy

Background Properties

2 mins

HTML/CSS
Solve

Easy

Colorful sentences

2 mins

HTML/CSS
Solve

Easy

Links

2 mins

HTML/CSS
Solve

Medium

Let's Hack
CSS Property

3 mins

HTML/CSS
Solve

Hard

Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State

3 mins

React
Solve

Medium

Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling

3 mins

React
Solve

Medium

Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization

3 mins

React
Solve

Hard

State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling

3 mins

React
Solve

Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
Solve
My Module
Scope
JavaScript
Medium2 mins
Solve
Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
Solve
Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
Solve
Background Properties
HTML/CSS
Easy2 mins
Solve
Colorful sentences
HTML/CSS
Easy2 mins
Solve
Links
HTML/CSS
Easy2 mins
Solve
Let's Hack
CSS Property
HTML/CSS
Medium3 mins
Solve
Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State
React
Hard3 mins
Solve
Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling
React
Medium3 mins
Solve
Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization
React
Medium3 mins
Solve
State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling
React
Hard3 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

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment JavaScript,HTML/CSS和React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 JavaScript,HTML/CSS和React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 #7

Detailed scorecards & benchmarks

Along with scorecards that report the performance of the candidate in detail, you also receive a comparative analysis against the company average and industry standards.

View sample scorecard
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 JavaScript, HTML/CSS & React Assessment Test

Why you should use Pre-employment JavaScript, HTML/CSS & React Online Test?

The JavaScript,HTML/CSS和React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:

  • 了解JavaScript语法和基本面
  • ES6功能和用法的知识
  • 能够编写面向对象的JavaScript代码的能力
  • 处理API并拨打HTTP的经验
  • 熟练使用异步node.js和承诺
  • 用JSX在React中构建可重复使用的组件
  • 了解反应组件生命周期
  • 使用React钩和功能组件的专业知识
  • 对CSS框模型的强烈了解
  • 使用Flexbox和网格创建灵活布局的能力

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 JavaScript, HTML/CSS & React Online Test?

  • JS ES6 </h4>

    JS ES6(Ecmascript 2015)是指JavaScript语言的最新版本。它包括新功能和语法改进,例如箭头函数,类,模块,模板文字,破坏和传播语法。在测试中测量了该技能,以评估候选人使用JavaScript的现代和更有效的功能的熟练程度。

  • JS OOPS </h4>

    JS OOPS(面向对象的编程)是指使用对象和类组织和结构代码的范式。它涉及概念,例如封装,继承和多态性。在测试中测量了该技能,以评估候选人在JavaScript中设计和实施面向对象的解决方案的能力,该解决方案在Web开发中广泛使用。

  • 处理APIS

    处理API涉及与应用程序编程接口(API)交互和消费的能力。它包括提出HTTP请求,解析JSON数据,处理身份验证和处理响应。在测试中测量了该技能,以评估候选人通过API互动将Web应用程序与外部服务整合到外部服务方面的知识和实践经验。

  • 异步node.js and Promises and Promises

    异步node.js指使用Node.js(JavaScript运行时环境)编写异步代码的能力。它涉及使用回调,承诺和异步/等待有效处理异步操作。在测试中测量了这项技能,以评估候选人在node.js环境中编写非阻滞和可扩展的JavaScript代码的能力。

  • 用JSX

    建立具有JSX的组件的构建组件涉及使用JSX语法创建可重复使用的UI组件,这是对React应用程序常用的JavaScript的扩展。它包括组成部分,道具和国家管理等概念。在测试中测量了该技能,以评估候选人使用JSX与JavaScript结合使用JSX开发模块化和可重复使用的UI组件的能力。

  • React组件lifecycle

    React Comption Comption Cometion Comece Comption Comption Cometion Comport comports lifecycle Refers Refers Refers Refers Refer React组件的生命周期涉及的阶段和方法,例如安装,更新和卸载。它包括ComponentDidMount,ComponentDidupDate和ComponentWillunMount等方法。在测试中测量了该技能,以评估候选人在生命周期期间对React组件如何行为和与DOM相互作用的理解和实践知识。

  • react钩子和功能成分

    react roce钩功能组件是指AEXT 16.8中引入的新功能,该功能允许开发人员在不编写课程的情况下使用状态和其他React功能。它涉及使用usestate,usefeft,usecontext和useref之类的挂钩。在测试中测量了此技能,以评估候选人在使用钩子和功能组件来构建可扩展和可维护的反应应用程序的熟练程度。

  • CSS框模型

    css box模型是指该概念在CSS中渲染和结构的元素。它包括宽度,高度,填充,边缘和边框等属性。在测试中测量了这项技能,以评估候选人对CSS中元素的大小,定位和间隔的理解,这对于创建视觉上吸引人和响应的Web布局至关重要。

  • Flexbox和网格布局</ H4> <p> Flexbox和网格布局是CSS布局模型,可在网页中提供灵活而有力的方式来安排元素。 Flexbox是一个一维布局,而网格是二维布局。在测试中测量了这项技能,以评估候选人使用这些现代CSS布局技术创建复杂而响应迅速的网络布局的能力。</p> <h4>响应能力的CSS

    响应式CSS是指创建创建的做法可以调整并适应不同屏幕尺寸和设备的网页。它涉及使用媒体查询,灵活单元(例如百分比和视口单元)以及Bootstrap等CSS框架。在测试中测量了该技能,以评估候选人开发Web应用程序的能力,该应用程序可在各种设备上提供无缝且优化的用户体验。

  • JavaScript编程

    JavaScript编程是指整体能够编写干净,高效和可维护的JavaScript代码的能力。它包括诸如代码组织,错误处理,调试,性能优化和代码文档之类的概念。在测试中测量了该技能,以评估候选人在JavaScript编程中的总体水平和能力,这对于任何网络开发角色都是至关重要的。

  • 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 JavaScript,HTML/CSS和React测试 to be based on.

    变量
    数据类型
    算术操作
    有条件的语句
    循环
    功能
    数组
    对象
    错误处理
    词汇范围
    关闭
    提升
    原型
    课程
    遗产
    ES6模块
    箭头功能
    破坏性
    模板文字
    传播操作员
    休息参数
    承诺对象
    异步/等待
    阿贾克斯
    提取API
    JSON
    DOM操纵
    事件处理
    浏览器存储
    反应组件
    JSX
    道具
    状态
    生命周期方法
    反应钩
    上下文API
    反应中的造型
    CSS选择器
    框型号
    Flexbox
    网格布局
    媒体查询
    响应式设计
    调试
    单位测试
    代码优化
    算法设计
    数据结构
    错误处理
    代码审查

What roles can I use the JavaScript, HTML/CSS & React Online Test for?

  • 完整的堆栈开发人员
  • JavaScript开发人员
  • 反应开发人员
  • 前端工程师

How is the JavaScript, HTML/CSS & React 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

  • 使用CSS创建响应式设计的经验
  • 精通JavaScript编程
  • JavaScript框架和库的高级知识
  • 有前端构建工具(例如Webpack或Babel)的经验
  • 优化Web性能并优化渲染的能力
  • 对国家管理库的了解,例如Redux或MOBX
  • 有测试框架等测试框架等经验
  • 与第三方API和服务集成的能力
  • 理解诸如git之类的版本控制系统
  • 有调试和故障排除复杂问题的经验
  • 强大的解决问题的技能和分析要求的能力

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,通过小组面试中提出的技术问题,他们能够判断哪些候选人得分更高,并与得分较差的候选人区分开来。他们是 非常满意 通过 Adaface 筛选入围的候选人的质量。


85%
减少筛查时间

JavaScript, HTML/CSS & React Hiring Test 常见问题解答

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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