Why you should use React & Redux Online Test?

The React & Redux online 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: Inzicht in de syntaxis en basisfuncties van JavaScript. Het toepassen van JavaScript ES6 -functies zoals pijlfuncties, sjabloonliteralen en destructureringstoewijzingen. Werken met asynchrone JavaScript inclusief beloften en async/wachten. Implementatie van react -basisprincipes zoals componenten, rekwisieten en staatsmanagement. Gebruikmakend van reacthaken voor functionele componentstatusbeheer. Inzicht in de levenscyclus van React Component en het gebruik van levenscyclusmethoden. Beheer van Global State met behulp van Redux State Management. Asynchrone API -aanvragen hanteren met behulp van Redux. Redux -acties en selectors maken voor efficiënt staatsmanagement. Het implementeren van JavaScript -coderingsoplossingen voor verschillende problemen.

React & Redux Online Test

About the test:

De React & Redux-test maakt gebruik van scenario-gebaseerde MCQ's om kandidaten te evalueren op hun vaardigheid in JavaScript-programmeertaal en de ontwikkeling van ReactJS met behulp van Redux. De test heeft één coderingsvraag om praktische JavaScript-coderingservaring te evalueren.

Covered skills:

JavaScript Syntax
Asynchrone JS
React Hooks
Redux State Management
Redux -acties en selectors

JavaScript ES6
React fundamentals
React Component Lifecycle
Redux API -afhandeling
Javascript codering

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9 reasons why

Adaface React & Redux Test is the most accurate way to shortlist Frontend ontwikkelaars

Reason #1

Tests for on-the-job skills

The React & Redux 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:

In staat om react.js effectief te gebruiken om dynamische gebruikersinterfaces te bouwen
In staat om Redux te begrijpen en te implementeren voor staatsmanagement
Bekwaam in JavaScript Syntax- en ES6 -functies
Bekwaam in het omgaan met asynchrone JavaScript -bewerkingen
Ervaren met React Component Lifecycle -methoden
Bedreven in het gebruik van reacthaken voor functionele componenten
Competent in het omgaan met API -aanvragen en antwoorden met Redux
Bekwaam bij het schrijven van Redux -acties en selectors
In staat om te coderen in JavaScript en programmeerproblemen oplossen

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

Dit zijn slechts een klein monster uit onze bibliotheek met meer dan 10.000 vragen. De werkelijke vragen hierover React & Redux online test zal niet-googelbaar zijn.

🧐 Question
Medium Debugging Redux Actions and Reducers JavaScript ES6 Reducers Actions	Try practice test
A developer is working with a Redux application for managing todo items. After some changes to the code, they started facing a problem: When they try to add a new todo item, it doesn't appear on the list. However, deleting a todo item works as expected. Here is the error message they see in the console when trying to add a todo: `Cannot read property 'undefined' of undefined.` And here is the relevant Redux code: Which of the following changes will resolve the issue? A: Change payload to todo in addTodo action creator. B: Change action.todo to action.payload in todoReducer for ADD_TODO case. C: Change action.todo to action.payload in todoReducer for ADD_TODO case and change action.index to action.payload for DELETE_TODO case. D: Change payload to todo in addTodo action creator and index to payload in deleteTodo action creator.
Medium Debugging Redux with Complex State and Action JavaScript ES6 Reducers Actions Immutability Object manipulation	Try practice test
A developer is working on a Redux application where each action carries an array of items, and each item is an object with an `id` and `value`. The state is an object where each key is an item's `id` and each value is the item's `value`. However, they notice that the `ADD_ITEMS` action isn't updating the state as expected. Here is the relevant Redux code: What change should the developer make to correct the issue?
Medium Direct State Mutation in Redux JavaScript ES6 Reducers Actions Mutations	Try practice test
A developer is creating a Redux application to manage a list of blog posts. Each post is represented by an object with id, title, and content properties. The Redux state should store the post list as an array. The developer observes that the modifications to the posts are not reflecting in the components. Here is an example of what the state could look like: Here is the relevant Redux code: Which of the following changes will resolve the issue?
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.
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?
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 Debugging Redux Actions and Reducers JavaScript ES6 Reducers Actions	2 mins Redux	Try practice test
A developer is working with a Redux application for managing todo items. After some changes to the code, they started facing a problem: When they try to add a new todo item, it doesn't appear on the list. However, deleting a todo item works as expected. Here is the error message they see in the console when trying to add a todo: `Cannot read property 'undefined' of undefined.` And here is the relevant Redux code: Which of the following changes will resolve the issue? A: Change payload to todo in addTodo action creator. B: Change action.todo to action.payload in todoReducer for ADD_TODO case. C: Change action.todo to action.payload in todoReducer for ADD_TODO case and change action.index to action.payload for DELETE_TODO case. D: Change payload to todo in addTodo action creator and index to payload in deleteTodo action creator.
	Medium Debugging Redux with Complex State and Action JavaScript ES6 Reducers Actions Immutability Object manipulation	2 mins Redux	Try practice test
A developer is working on a Redux application where each action carries an array of items, and each item is an object with an `id` and `value`. The state is an object where each key is an item's `id` and each value is the item's `value`. However, they notice that the `ADD_ITEMS` action isn't updating the state as expected. Here is the relevant Redux code: What change should the developer make to correct the issue?
	Medium Direct State Mutation in Redux JavaScript ES6 Reducers Actions Mutations	3 mins Redux	Try practice test
A developer is creating a Redux application to manage a list of blog posts. Each post is represented by an object with id, title, and content properties. The Redux state should store the post list as an array. The developer observes that the modifications to the posts are not reflecting in the components. Here is an example of what the state could look like: Here is the relevant Redux code: Which of the following changes will resolve the issue?
	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.
	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?
	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
	Debugging Redux Actions and Reducers JavaScript ES6 Reducers Actions	Redux	Medium	2 mins	Try practice test
A developer is working with a Redux application for managing todo items. After some changes to the code, they started facing a problem: When they try to add a new todo item, it doesn't appear on the list. However, deleting a todo item works as expected. Here is the error message they see in the console when trying to add a todo: `Cannot read property 'undefined' of undefined.` And here is the relevant Redux code: Which of the following changes will resolve the issue? A: Change payload to todo in addTodo action creator. B: Change action.todo to action.payload in todoReducer for ADD_TODO case. C: Change action.todo to action.payload in todoReducer for ADD_TODO case and change action.index to action.payload for DELETE_TODO case. D: Change payload to todo in addTodo action creator and index to payload in deleteTodo action creator.
	Debugging Redux with Complex State and Action JavaScript ES6 Reducers Actions Immutability Object manipulation	Redux	Medium	2 mins	Try practice test
A developer is working on a Redux application where each action carries an array of items, and each item is an object with an `id` and `value`. The state is an object where each key is an item's `id` and each value is the item's `value`. However, they notice that the `ADD_ITEMS` action isn't updating the state as expected. Here is the relevant Redux code: What change should the developer make to correct the issue?
	Direct State Mutation in Redux JavaScript ES6 Reducers Actions Mutations	Redux	Medium	3 mins	Try practice test
A developer is creating a Redux application to manage a list of blog posts. Each post is represented by an object with id, title, and content properties. The Redux state should store the post list as an array. The developer observes that the modifications to the posts are not reflecting in the components. Here is an example of what the state could look like: Here is the relevant Redux code: Which of the following changes will resolve the issue?
	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.
	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?
	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

Met Adaface konden we ons eerste screeningproces met ruim 75% optimaliseren, waardoor kostbare tijd vrijkwam voor zowel de rekruteringsmanagers als ons talentacquisitieteam!

Brandon Lee, Hoofd Mensen, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment React & Redux online 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 React & Redux online 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

Bekijk 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.

Reason #9

Advanced Proctoring

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About the React & Redux Assessment Test

Why you should use Pre-employment React & Redux Online Test?

The React & Redux online 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:

Inzicht in de syntaxis en basisfuncties van JavaScript.
Het toepassen van JavaScript ES6 -functies zoals pijlfuncties, sjabloonliteralen en destructureringstoewijzingen.
Werken met asynchrone JavaScript inclusief beloften en async/wachten.
Implementatie van react -basisprincipes zoals componenten, rekwisieten en staatsmanagement.
Gebruikmakend van reacthaken voor functionele componentstatusbeheer.
Inzicht in de levenscyclus van React Component en het gebruik van levenscyclusmethoden.
Beheer van Global State met behulp van Redux State Management.
Asynchrone API -aanvragen hanteren met behulp van Redux.
Redux -acties en selectors maken voor efficiënt staatsmanagement.
Het implementeren van JavaScript -coderingsoplossingen voor verschillende problemen.

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 React & Redux Online Test?

JavaScript ES6
JavaScript ES6, ook bekend Als ECMAScript 2015 introduceerde verschillende nieuwe functies en verbeteringen in de JavaScript -taal. Het bevat pijlfuncties, const en laat variabelen, sjabloonliteralen en meer. Assessing this skill in the test helps determine a candidate's familiarity with modern JavaScript syntax and their ability to write concise and efficient code.
Asynchronous JS
Asynchronous JavaScript involves executing code without blocking the execution van andere code. Het omvat meestal callbacks, beloften en async/wacht op syntaxis om taken zoals netwerkverzoeken of bestandsbewerkingen af te handelen. Deze vaardigheid is belangrijk om te meten, aangezien REACT en Redux vaak moeten werken met asynchrone bewerkingen, zoals het ophalen van gegevens van API's.
reageert fundamentals
Fundamentals omvatten de kernconcepten en principes van de principes React Library. Dit omvat leren over componenten, rekwisieten, staat, levenscyclusmethoden, JSX -syntaxis en hanteringsgebeurtenissen. Het meten van deze vaardigheid helpt de kennis en het begrip van een kandidaat en het begrip van de bouwstenen van React en hun vermogen om herbruikbare en efficiënte UI -componenten te creëren. React 16.8 waarmee ontwikkelaars staat en andere reactfuncties kunnen gebruiken zonder klasse -componenten te schrijven. Met haken kunnen functionele componenten hun eigen staat, levenscyclusmethoden en andere functionaliteiten hebben. Deze vaardigheid is belangrijk om te meten, aangezien haken de voorkeurs manier zijn geworden om reactcomponenten te schrijven en deze te begrijpen, is essentieel voor moderne reactontwikkeling.
react component lifecycle
De levenscyclus van de react component verwijst naar De verschillende fasen die een reactcomponent doorloopt van zijn creatie naar de verwijdering van de DOM. Het bevat methoden zoals ComponentDidMount, ComponentDidUpdate en Componentwillunmount. Het beoordelen van deze vaardigheid helpt bij het evalueren van het begrip van een kandidaat van de levenscyclusmethoden voor componenten en hun vermogen om deze effectief te gebruiken voor taken zoals gegevens die ophalen of opruimen bewerkingen. Bibliotheek voor JavaScript -toepassingen, vaak gebruikt in combinatie met React. Het biedt een voorspelbare staatscontainer en maakt gecentraliseerd beheer van applicatiestatus mogelijk. Door deze vaardigheid in de test te meten, kunnen recruiters de vaardigheid van een kandidaat beoordelen bij het gebruik van Redux om de complexe status te beheren en gegevensstroom te verwerken binnen een react -toepassing.
Redux API -behandeling
Redux API -behandeling omvat Schrijfacties, reductiemiddelen en middleware om asynchrone bewerkingen af te handelen, zoals het maken van API -aanvragen in een Redux -applicatie. Het bevat concepten zoals Thunk Middleware, het afhandelen van laden en foutstatus en het bijwerken van de Redux -winkel met opgehaalde gegevens. Het evalueren van deze vaardigheid helpt bij het bepalen van het vermogen van een kandidaat om Redux te integreren met API's en async -workflows effectief te beheren.
Redux -acties en selectors
Redux -acties zijn eenvoudige JavaScript -objecten die unieke gebeurtenissen vertegenwoordigen die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen optreden die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen gebeuren die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen gebeuren die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen gebeuren die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen gebeuren die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen gebeuren die unieke gebeurtenissen vertegenwoordigen die kunnen gebeuren die kunnen optreden. in een aanvraag. Selectors zijn functies die worden gebruikt om specifieke gegevens uit de Redux Store te extraheren en af te leiden. Het beoordelen van deze vaardigheid helpt het begrip en de implementatie van Redux-acties van een kandidaat te peilen voor statusupdates en selectors voor efficiënte gegevens ophalen in een op redux gebaseerde applicatie. Mogelijkheid om schone, efficiënte en onderhoudbare code te schrijven met behulp van JavaScript. Het omvat concepten zoals algoritmische probleemoplossing, gegevensmanipulatie en het toepassen van best practices. Het meten van deze vaardigheid in de test helpt bij het bepalen van de algemene JavaScript -vaardigheid van een kandidaat en hun vermogen om kwaliteitscode te schrijven bij het werken met React en Redux.
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 React & Redux online test to be based on.
JavaScript Syntax
JavaScript ES6
Asynchrone JS
React fundamentals
React Hooks
React Component Lifecycle
Redux State Management
Redux API -afhandeling
Redux -acties en selectors
Javascript codering
Functie
Variabelen
Gegevenstypen
Operators
Controlestroom
Arrays
Voorwerpen
Klassen
Beloften
Async/wachten
Sluitingen
Evenementlus
JSX
Componenten
Rekwisieten
Staat
Lifecycle -methoden
Haken
Context API
Componenten van hogere orde
Staatsmanagement
Vermindering
Actie -makers
Redux Store
Middleware
Dun
Axios
API -integratie
Selectors
Onveranderlijke gegevens
Testen met grap
Debuggen
Foutafhandeling
DOM -manipulatie
Evenementbehandeling
AJAX
API halen
Vernietigen
Spread Syntax
Pijlfuncties
Sjabloonliteralen
Rest parameters
Standaardparameters
Modules
Importeren/exporteren
Klassen
Erfenis
Prototypes
Arrays
Array -methoden
Array iteratie
Kaart
Set
Beloften
Generatoren

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What roles can I use the React & Redux Online Test for?

Frontend ontwikkelaar
Reageer ontwikkelaar
Redux -ontwikkelaar
Senior Redux Developer

How is the React & Redux 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

Schakelbare en onderhoudbare reacttoepassingen bouwen.
Optimalisatie van prestaties in react -toepassingen.
Implementatie van code -splitsing en luie laden in react -toepassingen.
React Router gebruiken voor client-side routing in react-toepassingen.
Integratie van bibliotheken en frameworks van derden met react-toepassingen.
Reactcomponenten testen met behulp van bibliotheken zoals Jest en Enzym.
Implementatie van server-side rendering (SSR) in React-applicaties.
React -toepassingen beveiligen door authenticatie en autorisatie te implementeren.
Het implementeren van gegevenscaching en persistentie in react -toepassingen.
Prestatieproblemen analyseren en oplossen in react- en redux -toepassingen.
Het ontwerpen en implementeren van schaalbare Redux -architectuur voor grote toepassingen.

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

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De rekruteringsmanagers waren van mening dat ze door de technische vragen die ze tijdens de panelgesprekken stelden, konden zien welke kandidaten beter scoorden, en onderscheidden ze zich met degenen die niet zo goed scoorden. Zij zijn zeer tevreden met de kwaliteit van de kandidaten op de shortlist van de Adaface-screening.

85%

Vermindering van de screeningstijd

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React & Redux Hiring Test Veelgestelde vragen

Kan ik meerdere vaardigheden combineren in één aangepaste beoordeling?

Ja absoluut. Aangepaste beoordelingen zijn opgezet op basis van uw functiebeschrijving en bevatten vragen over alle must-have vaardigheden die u opgeeft.

Heeft u functies tegen latere of proctoring op hun plaats?

We hebben de volgende anti-cheating-functies op zijn plaats:

Niet-googelbare vragen
IP Proctoring
Web Proctoring
Webcam Proctoring
Plagiaatdetectie
Beveilig browser

Lees meer over de Proctoring -functies.

Hoe interpreteer ik testscores?

Het belangrijkste om in gedachten te houden is dat een beoordeling een eliminatietool is, geen selectietool. Een vaardighedenbeoordeling is geoptimaliseerd om u te helpen kandidaten te elimineren die niet technisch gekwalificeerd zijn voor de rol, het is niet geoptimaliseerd om u te helpen de beste kandidaat voor de rol te vinden. Dus de ideale manier om een beoordeling te gebruiken is om een drempelscore te bepalen (meestal 55%, wij helpen u benchmark) en alle kandidaten uit te nodigen die boven de drempel scoren voor de volgende interviewrondes.

Voor welk ervaringsniveau kan ik deze test gebruiken?

Elke ADAFACE -beoordeling is aangepast aan uw functiebeschrijving/ ideale kandidaatpersonage (onze experts van het onderwerp zullen de juiste vragen kiezen voor uw beoordeling uit onze bibliotheek van 10000+ vragen). Deze beoordeling kan worden aangepast voor elk ervaringsniveau.

Krijgt elke kandidaat dezelfde vragen?

Ja, het maakt het veel gemakkelijker voor u om kandidaten te vergelijken. Opties voor MCQ -vragen en de volgorde van vragen worden gerandomiseerd. We hebben anti-cheating/proctoring functies. In ons bedrijfsplan hebben we ook de optie om meerdere versies van dezelfde beoordeling te maken met vragen over vergelijkbare moeilijkheidsniveaus.