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

The JavaScript, Nodejs & React Test 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: Понимание и внедрение оснований JavaScript, таких как переменные, типы данных, операторы и контрольные структуры Использование функций и синтаксиса ES6 (Ecmascript 2015) в JavaScript Применение объектно-ориентированных принципов программирования в JavaScript Обработка и выполнение асинхронных запросов с использованием API в JavaScript Использование обещаний и понимания концепции асинхронного программирования в node.js Внедрение системы модулей Node.js и понимание ее преимуществ Понимание жизненного цикла запроса-ответа в веб-разработке Строительство компонентов с JSX в React Понимание и внедрение жизненного цикла RAGE Component Использование крючков React и функциональных компонентов для создания динамических пользовательских интерфейсов

JavaScript, NodeJS & React Online Test

Q: What topics are covered in the JavaScript, NodeJS & React Online Test?

Основы JavaScript JS ES6 JS OOPS Обработка API Асинхронный узел.js и обещания Node.js модульная система Запросить жизненный цикл ответа Строительные компоненты с JSX Реагировать жизненный цикл компонента Реагировать крючки и функциональные компоненты Программирование JavaScript

About the test:

Тест JavaScript, Nodejs & React использует MCQ на основе сценариев для оценки кандидатов на их мастерство в языке программирования JavaScript, среде выполнения Nodejs и библиотеке реагирования для развития фронт-энда. Тест оценивает понимание кандидатов по таким темам, как архитектура на основе компонентов, управление состоянием, реагирование крючков, рендеринг на стороне сервера и виртуальный DOM. Кандидаты оцениваются по своей способности использовать JavaScript, Nodejs и реагировать на разработку отзывчивых и масштабируемых веб -приложений, а также их мастерство в написании оптимизированного и безопасного кода.

Covered skills:

Основы JavaScript
JS OOPS
Асинхронный узел.js и обещания
Запросить жизненный цикл ответа
Реагировать жизненный цикл компонента
Программирование JavaScript

JS ES6
Обработка API
Node.js модульная система
Строительные компоненты с JSX
Реагировать крючки и функциональные компоненты

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9 reasons why

Adaface JavaScript, NodeJS & React Test is the most accurate way to shortlist Разработчик JavaScripts

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:

Способный эффективно обрабатывать исключения и ошибки
Сильное понимание синтаксиса и функций JavaScript
Опытные по функциям ES6, такие как функции стрел и шаблоны литералов
Знание объектно-ориентированных принципов программирования в JavaScript
Опыт работы с API и выполнением запросов AJAX
Понимание асинхронных концепций программирования в node.js с использованием обещаний
Знакомство с системой модулей Node.js и тем, как организовать код в модули
Понимание жизненного цикла запроса-ответа в node.js
Возможность создавать компоненты с использованием JSX в React
Знание жизненного цикла COMPONT COMPONT и того, как управлять состоянием компонентов
Знакомство с крючками React и функциональными компонентами
Мастерство в программировании JavaScript

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

Это лишь небольшая выборка из нашей библиотеки из более чем более 10000 вопросов. Фактические вопросы по этому поводу JavaScript, Nodejs & React Test будет не подлежащим гугливым.

🧐 Question
Medium Async Await Promises Promises Async-Await	Try practice test
What will the following code output? 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	Try practice test
Review the following JavaScript code and pick the correct options: 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	Try practice test
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await	Try practice test
What does the following code output?
Easy Throw, Try, Async Promises Async-Await	Try practice test
What does the following JS code output?
Medium I/O cycle and main module Event Loop	Try practice test
Review the following NodeJS code: 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	Try practice test
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	Try practice test
Review the following NodeJS code: 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	Try practice test
Review the following React code: 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	Try practice test
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: 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	Try practice test
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
Hard State Handling with Custom Hooks Custom Hooks Context API Event Handling	Try practice test
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: 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	Try practice test
What will the following code output? 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	2 mins JavaScript	Try practice test
Review the following JavaScript code and pick the correct options: 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	2 mins JavaScript	Try practice test
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await	2 mins JavaScript	Try practice test
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await	2 mins JavaScript	Try practice test
What does the following JS code output?
	Medium I/O cycle and main module Event Loop	2 mins NodeJS	Try practice test
Review the following NodeJS code: 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	3 mins NodeJS	Try practice test
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	2 mins NodeJS	Try practice test
Review the following NodeJS code: 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	3 mins React	Try practice test
Review the following React code: 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	3 mins React	Try practice test
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: 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	3 mins React	Try practice test
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
	Hard State Handling with Custom Hooks Custom Hooks Context API Event Handling	3 mins React	Try practice test
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: 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	30 mins Coding	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	30 mins Coding	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	💪 Difficulty	⌛ Time
	Async Await Promises Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What will the following code output? 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
	Bitcoin prices Axios Promises	JavaScript	Medium	2 mins	Try practice test
Review the following JavaScript code and pick the correct options: 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?
	My Module Scope	JavaScript	Medium	2 mins	Try practice test
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What does the following code output?
	Throw, Try, Async Promises Async-Await	JavaScript	Easy	2 mins	Try practice test
What does the following JS code output?
	I/O cycle and main module Event Loop	NodeJS	Medium	2 mins	Try practice test
Review the following NodeJS code: 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
	Res methods	NodeJS	Easy	3 mins	Try practice test
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
	Phases and Timers Event Loop	NodeJS	Medium	2 mins	Try practice test
Review the following NodeJS code: 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.
	Context re-renders React Context API Conditional Rendering Component Lifecycle State	React	Hard	3 mins	Try practice test
Review the following React code: 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
	Hooks with Conditional Rendering Hooks Conditional Rendering Event Handling	React	Medium	3 mins	Try practice test
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: 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.
	Rhyme Reducer Reducer functions Immutable update patterns Lazy initialization	React	Medium	3 mins	Try practice test
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
	State Handling with Custom Hooks Custom Hooks Context API Event Handling	React	Hard	3 mins	Try practice test
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: 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.
	Registration Queue Logic Queues	Coding	Easy	30 mins	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
	Visitors Count Strings Logic	Coding	Medium	30 mins	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.

Reason #4

1200+ customers in 75 countries

С помощью Adaface мы смогли оптимизировать первоначальный процесс отбора более чем на 75 %, высвободив драгоценное время как для менеджеров по найму, так и для нашей команды по привлечению талантов!

Brandon Lee, Глава отдела кадров, 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 Test 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 Test 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

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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 JavaScript, NodeJS & React Assessment Test

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

The JavaScript, Nodejs & React Test 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:

Понимание и внедрение оснований JavaScript, таких как переменные, типы данных, операторы и контрольные структуры
Использование функций и синтаксиса ES6 (Ecmascript 2015) в JavaScript
Применение объектно-ориентированных принципов программирования в JavaScript
Обработка и выполнение асинхронных запросов с использованием API в JavaScript
Использование обещаний и понимания концепции асинхронного программирования в node.js
Внедрение системы модулей Node.js и понимание ее преимуществ
Понимание жизненного цикла запроса-ответа в веб-разработке
Строительство компонентов с JSX в React
Понимание и внедрение жизненного цикла RAGE Component
Использование крючков React и функциональных компонентов для создания динамических пользовательских интерфейсов

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?

Основы JavaScript </H4> <p> Основы JavaScript - это фундаментальный навык, который измеряет понимание кандидата основных концепций языка программирования JavaScript, таких как типы данных, переменные, операторы и управление. Этот навык важен для оценки, поскольку он формирует основу для эффективного и эффективного написания кода JavaScript. включая функции стрел, деструктуризация, классы, модули и улучшенные объектные литералы. Оценка этого навыка имеет решающее значение, поскольку он определяет способность кандидата использовать последние функции и улучшения синтаксиса в Javascript. </p> <h4> js oops
js oops (объектно-ориентированное программирование в Javascript) оценивает Знание кандидата о объектно-ориентированных принципах и методах в JavaScript, таких как инкапсуляция, наследование и полиморфизм. Этот навык важен, поскольку он позволяет разработчикам разрабатывать и реализовать надежные и масштабируемые приложения с использованием JavaScript. ) Использование JavaScript. Этот навык необходим, поскольку он демонстрирует возможность извлекать, отправлять и обрабатывать данные из внешних источников, которые часто требуются в проектах веб -разработки. Асинхронный узел.js и обещания оценивают понимание кандидата асинхронного программирования в node.js и использование обещаний для обработки асинхронных операций. Этот навык имеет решающее значение, поскольку Node.js широко используется для создания приложений на стороне сервера, а эффективная обработка асинхронных операций является ключом к достижению хорошей производительности и отзывчивости. Система модулей p> node.js оценивает знакомство кандидата с модульной системой в node.js, которая позволяет организации и повторному использованию кода через модули. Этот навык важен, поскольку он позволяет разработчикам использовать существующие модули, поддерживать разделение кода и модульность и облегчить процесс разработки в node.js. Понимание кандидата по течению и этапам, связанным с обработкой HTTP -запросов и генерации ответов в веб -приложениях. Этот навык имеет решающее значение для веб -разработчиков, поскольку он гарантирует, что они могут эффективно обрабатывать и манипулировать HTTP -запросами, выполнять необходимые действия и генерировать точные ответы на основе запросов клиентов. Строительство компонентов с JSX оценивает способность кандидата создавать многоразовые и модульные компоненты в React с использованием JSX (JavaScript XML). Этот навык важен, поскольку JSX упрощает процесс создания динамических и интерактивных пользовательских интерфейсов с React, что позволяет разработчикам эффективно создавать сложные структуры пользовательского интерфейса. Знание кандидата о различных этапах и методах, связанных с жизненным циклом реагирования компонента. Этот навык имеет решающее значение, поскольку он позволяет разработчикам управлять и управлять рендерингом компонентов, монтажного, обновления и умонта > React Hooks и функциональные компоненты измеряют мастерство кандидата в использовании крючков React и функциональных компонентов здания в React. Этот навык важен, так как крючки React обеспечивают краткий и эффективный способ управления состоянием, побочными эффектами и другими функциями React в функциональных компонентах, содействие повторному использованию кода и улучшению общей организации кода.
программирование Javascript
Программирование JavaScript оценивает общее мастерство кандидата в JavaScript и их способность применять язык для решения сложных задач программирования. Этот навык представляет собой всестороннюю оценку знаний кандидата, охватывающая широкий спектр концепций JavaScript, синтаксиса и лучших практик, чтобы убедиться, что они могут писать эффективные, поддерживаемые и масштабируемые код JavaScript.
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 Test to be based on.
Переменные
Типы данных
Операторы
Управление потоком
Функции
Массивы
Объекты
Объем
Закрытие
Опытный образец
Наследование
Функции стрелы
Шаблоны литералы
Разрушение
Обещания
Асинхрон/жду
Модули
Npm
Express.js
Маршрутизация
Промежуточное программное обеспечение
Аякс
Обещания
Функции обратного вызова
Потоки
Буферы
Файловая система
Обработка ошибок
Отладка
Реагировать компоненты
JSX
Состояние компонента
Методы жизненного цикла
Реагировать крючки
Обработка событий
Формы
Компоненты высшего порядка
Контекст API
Государственное управление
Реагировать маршрутизатор
ЕДИНЦИОННЫЕ Тестирование
Интеграционное тестирование
Отладка
Функциональное программирование
Структуры данных
Алгоритмы
DOM манипуляции
Обработка событий
Обработка ошибок
Обычные выражения
Json
Fetch API
LocalStorage
SessionStorage
Дата и время
Математика
Обработка ошибок
Отладка

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

Разработчик JavaScript
Застройщик Frontend
Разработчик полного стека
Разработчик Node.js
React Developer

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

Применение концепций программирования JavaScript в решении проблем
Работа с событиями JavaScript и обработкой событий
Реализация и работа со структурами данных JavaScript
Понимание и использование закрытия в JavaScript
Реализация обработки ошибок и управления исключениями в JavaScript
Работа со сторонними библиотеками и рамками в JavaScript
Понимание и работа с Restful API
Создание и развертывание приложений с использованием node.js и express.js
Реализация управления состоянием в React с использованием Redux или Context API
Написание оптимизированного и эффективного кода JavaScript

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

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Менеджеры по найму чувствовали, что с помощью технических вопросов, которые они задавали во время групповых собеседований, они могли определить, какие кандидаты имеют более высокие баллы, и отличиться от тех, кто не набрал таких же баллов. Они есть очень доволен с качеством кандидатов, включенных в шорт-лист отбора Adaface.

85%

Сокращение времени проверки

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JavaScript, NodeJS & React Hiring Test Часто задаваемые вопросы

Могу ли я объединить несколько навыков в одну пользовательскую оценку?

Да, конечно. Пользовательские оценки настроены на основе вашей должности и будут включать вопросы по всем необходимым навыкам, которые вы указываете.

Есть ли у вас какие-либо функции против Chating или Proctoring?

У нас есть следующие функции антихиализации:

Необъемлющие вопросы
IP Proctoring
Веб -прокторинг
Веб -камера Proctoring
Обнаружение плагиата
Безопасный браузер

Узнайте больше о функциях Proctoring.

Как мне интерпретировать результаты тестов?

Основная вещь, которую нужно помнить, это то, что оценка - это инструмент устранения, а не инструмент отбора. Оценка навыков оптимизирована, чтобы помочь вам устранить кандидатов, которые технически не имеют квалификации для этой роли, она не оптимизирована, чтобы помочь вам найти лучшего кандидата на роль. Таким образом, идеальный способ использования оценки - определить пороговый балл (обычно 55%, мы помогаем вам сравнить) и пригласить всех кандидатов, которые забивают выше порога для следующих раундов интервью.

На каком уровне опыта я могу использовать этот тест?

Каждая оценка Adaface настроена на ваш инструкции/ Идеальный кандидат (наши эксперты по предметам выберут правильные вопросы для вашей оценки из нашей библиотеки из 10000+ вопросов). Эта оценка может быть настроена для любого уровня опыта.

Каждый кандидат получает одинаковые вопросы?

Да, вам намного проще сравнить кандидатов. Варианты для вопросов MCQ и порядок вопросов рандомизированы. У нас есть против Chating/Proctoring. В нашем плане предприятия у нас также есть возможность создать несколько версий одной и той же оценки с вопросами аналогичных уровней сложности.