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About the test:

JavaScript,Nodejs&SQL测试使用基于方案的MCQ来评估候选者在JavaScript编程语言,NodeJS运行时环境和SQL数据库方面的熟练程度。该测试评估了候选人对事件驱动的编程,异步编程,中间件,数据库连接,SQL查询和数据库设计原理等主题的理解。评估了他们使用JavaScript和Nodejs开发服务器端应用程序,与数据库,设计数据库模式进行交互的能力,并编写优化和安全的SQL查询,以进行数据操作和检索。

Covered skills:

  • JavaScript基础知识
  • JS糟糕
  • 异步node.js和承诺
  • 请求响应生命周期
  • SQL加入和索引
  • JS ES6
  • 处理API
  • Node.js模块系统
  • SQL CRUD操作
  • JavaScript编程

9 reasons why
9 reasons why

Adaface JavaScript, NodeJS & SQL 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, NodeJS & SQL 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:

  • 精通JavaScript基础知识
  • 对JS ES6概念的强烈理解
  • 能够应用JavaScript OOPS原则
  • 在JavaScript中处理API的经验
  • 熟悉node.js和Prosiss中的异步编程
  • node.js模块系统的深刻知识
  • 了解node.js中的请求响应生命周期
  • SQL Crud操作的能力
  • SQL连接和索引的技能
  • 强大的JavaScript编程技能
  • 有效错误和异常处理
  • 具有GIT版本控制的经验
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,Nodejs和SQL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

Medium

I/O cycle and main module
Event Loop
Solve
Review the following NodeJS code:
 image
Pick the correct statements:

A: X will be logged after Y always
B: Y will be logged after X always
C: The order of executing timeout and immediate callbacks is non-deterministic and is bound by the performance of the process
D: In this case, the function calls are scheduled in the main module and not in the I/O cycle
E: In this case, the function calls are scheduled in the I/O cycle so setImmediate is always executed before any timers scheduled in the I/O phase, independently of how many timers are left

Easy

Res methods
Solve
If none of the methods (res.download, res.end, res.json, res.jsonp, res.redirect, res.render, res.send, res.sendFile, res.sendStatus) are called from a route handler to terminate request response cycle, what happens to the the client request?
A) Will be left hanging indefinitely

B) Will get an internal server error - 500 

C) Will get a service unavailable error - 503

D) Will be left hanging for a while and then request timeout error - 408

Medium

Phases and Timers
Event Loop
Solve
Review the following NodeJS code:
 image
Pick the correct statements:

A: Adaface will be logged after Lovelace.
B: Lovelace will be logged after Adaface.
C: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback which takes 10 seconds. Only after this is finished, the event loop will execute the timers that are finished. So the timeout call back will actually be executed after 205 ms even though it is scheduled to be run after 200 ms
D: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback. While executing the callback, the scheduled timer becomes ready to be executed. So the runtime executes the timer and then completes processing the callback.

Medium

Multi Select
JOIN
GROUP BY
Solve
Consider the following SQL table:
 image
How many rows does the following SQL query return?
 image

Medium

nth highest sales
Nested queries
User Defined Functions
Solve
Consider the following SQL table:
 image
Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
 image

Medium

Select & IN
Nested queries
Solve
Consider the following SQL table:
 image
Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
 image

Medium

Sorting Ubers
Nested queries
Join
Comparison operators
Solve
Consider the following SQL table:
 image
What will be the first two tuples resulting from the following SQL command?
 image

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions
Solve
Consider the following SQL table:
 image
How many tuples does the following query return?
 image

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

Medium

I/O cycle and main module
Event Loop

2 mins

NodeJS
Solve

Easy

Res methods

3 mins

NodeJS
Solve

Medium

Phases and Timers
Event Loop

2 mins

NodeJS
Solve

Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
Solve

Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
Solve

Medium

Select & IN
Nested queries

3 mins

SQL
Solve

Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
Solve

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions

2 mins

SQL
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
I/O cycle and main module
Event Loop
NodeJS
Medium2 mins
Solve
Res methods
NodeJS
Easy3 mins
Solve
Phases and Timers
Event Loop
NodeJS
Medium2 mins
Solve
Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
Solve
nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
Solve
Select & IN
Nested queries
SQL
Medium3 mins
Solve
Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
Solve
With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
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,我们能够将初步筛选流程优化高达 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,Nodejs和SQL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,Nodejs和SQL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, NodeJS & SQL Assessment Test

Why you should use Pre-employment JavaScript, NodeJS & SQL Online Test?

The JavaScript,Nodejs和SQL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:

  • 了解和实施基本的JavaScript语法
  • 有效地使用JavaScript ES6功能
  • 使用JavaScript OOPS概念来创建和操纵对象
  • 使用API​​来获取和处理数据
  • 使用承诺在Node.js中处理异步操作
  • 了解和利用Node.js模块系统
  • 了解node.js中的请求响应生命周期
  • 使用JavaScript在SQL中执行CRUD操作
  • 有效地利用SQL加入和索引
  • 应用JavaScript编程概念来解决问题

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, NodeJS & SQL Online Test?

  • JS ES6

    JS ES6专注于新功能以及在Ecmascript 6中引入的增强功能,这是JavaScript的最新版本。它包括诸如箭头功能,模板文字,破坏性,类,模块和承诺之类的概念。在测试中测量了该技能,以评估候选人对现代JavaScript语言特征的熟悉程度及其编写高效且可维护的代码的能力。

  • JS OOPS

    <p> JS OOPS(面向对象的编程) )涉及将代码组织到可重复使用的对象中,并使用继承,封装和多态性。它允许更好的代码组织,模块化和可重复性。在测试中测量了该技能,以评估候选人在编写面向对象的JavaScript代码及其对OOP原理的理解的熟练程度。

  • 处理APIS

    处理API涉及从外部网络检索数据API并将其集成到JavaScript应用程序中。它需要了解HTTP请求,JSON解析和处理异步操作的知识。在测试中测量了该技能,以评估候选人使用Web API并在JavaScript应用程序中消耗外部数据的能力。

  • 异步node.js and Promises and Promises

    异步node.js和nodenode.js and andnchronous node.js和承诺的重点是node.js的异步性质以及使用诺言来处理异步操作。它包括回调,事件驱动的编程,异步/等待和错误处理等概念。在测试中测量了这项技能,以评估候选人对Node.js中异步编程的理解及其编写有效且可扩展的异步代码的能力。

  • node.js module system

    节点.JS模块系统涵盖了Node.js应用程序中的组织和可重复使用的模块。它包括使用核心模块,自定义模块创建和模块分辨率等概念,例如导入和导出模块。在测试中测量了该技能,以评估候选人对Node.js中模块系统的熟悉程度及其在Node.js Projects中有效创建和使用模块的能力。

  • SQL CRUD CRUD操作

    SQL CRUD操作是指使用结构化查询语言(SQL)在数据库上执行的创建,阅读,更新和删除操作。它包括诸如插入数据,查询数据,更新数据以及从关系数据库中删除数据之类的概念。在测试中测量了这项技能,以评估候选人在SQL上的熟练程度及其使用SQL进行基本数据库操作的能力。

  • SQL JONINS和INDEXES

    SQL JOINS和索引涉及与索引合作。关系数据库,并了解如何使用索引加入表并优化数据库性能。它包括内部联接,外连接,交叉连接,主要键,外键和索引创建等概念。在测试中测量了该技能,以评估候选人编写涉及加入的复杂查询的能力,以及他们使用索引优化数据库查询的知识。

  • JavaScript编程

    Javascript编程涵盖了整体能力候选人编写干净,高效且结构良好的JavaScript代码。它评估他们对最佳实践,编码惯例,错误处理,代码性能和故障排除技能的了解。在测试中测量了该技能,以评估候选人在JavaScript编程方面的总体水平及其使用JavaScript解决编程问题的能力。

  • 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 JavaScript,Nodejs和SQL测试 to be based on.

    数据类型
    操作员
    功能
    数组
    对象
    字符串
    有条件
    循环
    关闭
    原型
    箭头功能
    破坏性
    休息/传播操作员
    承诺
    异步/等待
    模块
    事件驱动的编程
    缓冲区和流
    文件系统
    HTTP模块
    快速框架
    错误处理中间件
    路由
    SQL的CRUD操作
    数据操纵语言
    数据定义语言
    交易
    索引
    加入
    正常化
    聚合功能
    内部联接
    左加入
    正确加入
    完整的外部连接
    回调
    错误处理
    异常处理
    调试
    测试
    常用表达
    内存管理
    变量
    范围
    回调
    事件处理
    基于原型的继承
    错误传播
    异步编程
    单向数据流
    不变的数据
    数据绑定
    依赖注入
    CRUD API操作
    保证链条
    诺言错误处理
    eslint
    NPM脚本
    git命令
    拉请求

What roles can I use the JavaScript, NodeJS & SQL Online Test for?

  • 完整的堆栈开发人员
  • JavaScript开发人员
  • Node.js开发人员
  • SQL开发人员

How is the JavaScript, NodeJS & SQL 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

  • 实施JavaScript数据结构和算法
  • 优化性能的JavaScript代码
  • 在node.js中创建和维护RESTFUL API
  • 在Node.js应用程序中实施身份验证和授权
  • 了解和使用Node.js中的NOSQL数据库
  • 使用JavaScript框架和库(例如,Express,React)开发Web应用程序
  • 实施测试驱动的开发(TDD)和JavaScript代码的编写单元测试
  • 调试和故障排除JavaScript应用程序
  • 利用缓存机制并优化Node.js中的数据库查询
  • 使用Node.js Frameworks实施服务器端渲染(SSR)

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%
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JavaScript, NodeJS & SQL 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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