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About the test:

JavaScriptのNodeJS&React Testは、シナリオベースのMCQを使用して、JavaScriptプログラミング言語、NodeJSランタイム環境、およびフロントエンド開発のためのReact Libraryの習熟度に関する候補者を評価します。このテストでは、コンポーネントベースのアーキテクチャ、国家管理、Reactフック、サーバー側のレンダリング、仮想DOMなどのトピックに対する候補者の理解を評価します。候補者は、JavaScript、nodejsを使用し、反応してスケーラブルなWebアプリケーションを開発する能力と、最適化された安全なコードと安全なコードを書面で習得する能力について評価されます。

Covered skills:

  • JavaScript Basics
  • JSおっと
  • 非同期node.jsおよび約束
  • 応答ライフサイクルを要求します
  • 反応コンポーネントライフサイクル
  • JavaScriptプログラミング
  • JS ES6
  • APIの処理
  • node.jsモジュールシステム
  • JSXを使用したコンポーネントの構築
  • 反応フックと機能コンポーネント

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9 reasons why
9 reasons why

Adaface JavaScript, NodeJS & React Test is the most accurate way to shortlist JavaScript開発者s



Reason #1

Tests for on-the-job skills

The JavaScript, NodeJS & 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:

  • 例外とエラーを効率的に処理できます
  • JavaScriptの構文と関数の強力な理解
  • 矢印関数やテンプレートリテラルなどのES6機能に習熟
  • JavaScriptのオブジェクト指向プログラミング原則の知識
  • APIの処理とAjaxリクエストの作成の経験
  • 約束を使用したnode.jsにおける非同期プログラミングの概念の理解
  • node.jsモジュールシステムとモジュールにコードを整理する方法に精通している
  • node.jsのリクエスト応答ライフサイクルの理解
  • JSXを使用してReactでコンポーネントを構築する機能
  • Reactコンポーネントライフサイクルの知識とコンポーネント状態の管理方法
  • Reactフックと機能的なコンポーネントに精通しています
  • JavaScriptプログラミングの習熟度
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
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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

これらは、10,000以上の質問のライブラリからのわずかなサンプルです。これに関する実際の質問 JavaScript、nodejs&Reactテスト グーグルできません.

🧐 Question

Medium

Async Await Promises
Promises
Async-Await
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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
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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
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What will the output of the following JavaScript code be?
 image
 image

Medium

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

Easy

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

Medium

I/O cycle and main module
Event Loop
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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
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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
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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.

Hard

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

Bitcoin prices
Axios
Promises

2 mins

JavaScript
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Medium

My Module
Scope

2 mins

JavaScript
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Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
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Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
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Medium

I/O cycle and main module
Event Loop

2 mins

NodeJS
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Easy

Res methods

3 mins

NodeJS
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Medium

Phases and Timers
Event Loop

2 mins

NodeJS
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Hard

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

3 mins

React
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Medium

Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling

3 mins

React
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Medium

Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization

3 mins

React
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Hard

State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling

3 mins

React
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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
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Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
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My Module
Scope
JavaScript
Medium2 mins
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Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
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Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
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I/O cycle and main module
Event Loop
NodeJS
Medium2 mins
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Res methods
NodeJS
Easy3 mins
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Phases and Timers
Event Loop
NodeJS
Medium2 mins
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Context re-renders
React Context API
Conditional Rendering
Component Lifecycle State
React
Hard3 mins
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Hooks with Conditional Rendering
Hooks
Conditional Rendering
Event Handling
React
Medium3 mins
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Rhyme Reducer
Reducer functions
Immutable update patterns
Lazy initialization
React
Medium3 mins
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State Handling with Custom Hooks
Custom Hooks
Context API
Event Handling
React
Hard3 mins
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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

Adaface を使用することで、最初の選考プロセスを 75% 以上最適化することができ、採用担当マネージャーと人材獲得チームの両方にとって貴重な時間を解放することができました。


Brandon Lee, 人々の責任者, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment JavaScript、nodejs&Reactテスト 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&Reactテスト 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
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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.

test completion rate
Reason #9

Advanced Proctoring


Learn more

About the JavaScript, NodeJS & React Assessment Test

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

The JavaScript、nodejs&Reactテスト 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:

  • 変数、データ型、演算子、制御構造などのJavaScriptの基礎を理解して実装する
  • JavaScriptでES6(ECMAScript 2015)の機能と構文を利用する
  • JavaScriptにオブジェクト指向のプログラミング原則を適用します
  • JavaScriptでAPIを使用して非同期リクエストの処理と作成
  • 約束を活用し、node.jsで非同期プログラミングの概念を理解する
  • node.jsモジュールシステムを実装し、その利点を理解します
  • Web開発におけるリクエスト応答ライフサイクルを理解する
  • 反応中のJSXを使用したコンポーネントの構築
  • Reactコンポーネントライフサイクルの理解と実装
  • 反応フックと機能的なコンポーネントを利用して、動的なユーザーインターフェイスを構築する

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 & React Online Test?

  • 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&Reactテスト to be based on.

    変数
    データ型
    オペレーター
    制御フロー
    機能
    配列
    オブジェクト
    範囲
    閉鎖
    プロトタイプ
    継承
    矢印機能
    テンプレートリテラル
    破壊
    約束
    async/await
    モジュール
    npm
    Express.js
    ルーティング
    ミドルウェア
    ajax
    約束
    コールバック関数
    ストリーム
    バッファー
    ファイルシステム
    エラー処理
    デバッグ
    反応コンポーネント
    JSX
    コンポーネント状態
    ライフサイクル方法
    反応フック
    イベント処理
    フォーム
    高次コンポーネント
    コンテキストAPI
    国家管理
    反応ルーター
    単体テスト
    統合テスト
    デバッグ
    機能プログラミング
    データ構造
    アルゴリズム
    DOM操作
    イベント処理
    エラー処理
    正規表現
    JSON
    APIを取得します
    ローカルストレージ
    sessionstorage
    日時
    数学
    エラー処理
    デバッグ
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What roles can I use the JavaScript, NodeJS & React Online Test for?

  • JavaScript開発者
  • フロントエンドの開発者
  • フルスタック開発者
  • node.js開発者
  • React開発者

How is the JavaScript, NodeJS & 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

  • 問題解決にJavaScriptプログラミングの概念を適用します
  • JavaScriptイベントとイベント処理を操作します
  • JavaScriptデータ構造の実装と作業
  • JavaScriptの閉鎖の理解と利用
  • JavaScriptにエラー処理と例外管理の実装
  • JavaScriptのサードパーティライブラリとフレームワークを操作します
  • Restful APIを理解し、作業します
  • node.jsおよびexpress.jsを使用してアプリケーションを構築および展開します
  • ReduxまたはContextAPIを使用してReactに状態管理を実装する
  • 最適化された効率的なJavaScriptコードを作成します

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

Singapore government logo

採用担当者は、パネル面接中に尋ねる専門的な質問を通じて、どの候補者がより良いスコアを持っているかを判断し、スコアが低い候補者と区別できると感じました。彼らです 非常に満足 Adaface のスクリーニングで最終候補者に選ばれた候補者の質を重視します。


85%
スクリーニング時間の短縮

JavaScript, NodeJS & React Hiring Test よくある質問

複数のスキルを1つのカスタム評価に組み合わせることはできますか?

そのとおり。カスタム評価は、職務内容に基づいて設定され、指定したすべての必須スキルに関する質問が含まれます。

アンチチートまたは監督の機能はありますか?

次のアンチチート機能があります。

  • グーグル不可能な質問
  • IP監督
  • Webの提案
  • ウェブカメラの監督
  • 盗作の検出
  • 安全なブラウザ

[プロクチャリング機能](https://www.adaface.com/proctoring)の詳細をご覧ください。

テストスコアを解釈するにはどうすればよいですか?

留意すべき主なことは、評価が選択ツールではなく排除ツールであることです。スキル評価が最適化され、技術的にその役割の資格がない候補者を排除するのに役立ちます。これは、役割の最良の候補者を見つけるのに役立つために最適化されていません。したがって、評価を使用する理想的な方法は、しきい値スコア(通常は55%、ベンチマークを支援します)を決定し、インタビューの次のラウンドのしきい値を超えてスコアを上回るすべての候補者を招待することです。

このテストを使用できますか?

各ADAFACE評価は、職務記述書/理想的な候補者のペルソナにカスタマイズされます(当社の主題の専門家は、10000以上の質問のライブラリからあなたの評価に適切な質問を選択します)。この評価は、あらゆる経験レベルでカスタマイズできます。

すべての候補者は同じ質問を受け取りますか?

私は候補者です。練習テストを試すことはできますか?

いいえ。残念ながら、現時点では練習テストをサポートしていません。ただし、[サンプルの質問](https://www.adaface.com/questions)を使用するには、練習できます。

このテストを使用するコストはいくらですか?

無料トライアルを受けることはできますか?

私はちょうど有料プランに移りました。カスタム評価をリクエストするにはどうすればよいですか?

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Join 1200+ companies in 75+ countries.
今日、最も候補者のフレンドリーなスキル評価ツールをお試しください。
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