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: Forståelse af syntaks og grundlæggende funktioner i JavaScript. Anvendelse af JavaScript ES6 -funktioner såsom pilfunktioner, skabelon -bogstaver og destruktionsopgaver. Arbejde med asynkron JavaScript inklusive løfter og async/afventer. Implementering af React Fundamentals som komponenter, rekvisitter og statsledelse. Brug af React -kroge til funktionel komponenttilstandsstyring. Forståelse af reaktionskomponentens livscyklus og ved hjælp af livscyklusmetoder. Håndtering af global stat ved hjælp af Redux State Management. Håndtering af asynkron API -anmodninger ved hjælp af Redux. Oprettelse af Redux -handlinger og vælgere til effektiv statsstyring. Implementering af JavaScript -kodningsløsninger til forskellige problemer.

React & Redux Online Test

About the test:

React & Redux-testen bruger scenariebaserede MCQ'er til at evaluere kandidater om deres færdigheder i JavaScript-programmeringssprog og ReactJS-udvikling ved hjælp af Redux. Testen har et kodningsspørgsmål til at evaluere praktisk JavaScript-kodningsoplevelse.

Covered skills:

JavaScript Syntax
Asynkron JS
Reagere kroge
Redux State Management
Redux -handlinger og vælgere

JavaScript ES6
React Fundamentals
React Component Lifecycle
Redux API -håndtering
JavaScript -kodning

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9 reasons why

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

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:

I stand til effektivt at bruge React.js til at opbygge dynamiske brugergrænseflader
I stand til at forstå og implementere redux til statsledelse
Dygtige til JavaScript -syntaks og ES6 -funktioner
Dygtige til håndtering af asynkron JavaScript -operationer
Erfarne med React -komponent livscyklusmetoder
Adept til at bruge React Hooks til funktionelle komponenter
Kompetent til håndtering af API -anmodninger og svar med Redux
Dygtige til at skrive Redux -handlinger og vælgere
I stand til kodning i JavaScript og løse programmeringsproblemer

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

Dette er kun en lille prøve fra vores bibliotek med 10.000+ spørgsmål. De faktiske spørgsmål om dette React & Redux Online Test vil være ikke-gåbart.

🧐 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

Med Adaface var vi i stand til at optimere vores indledende screeningsproces med op mod 75 %, hvilket frigjorde kostbar tid for både ansættelsesledere og vores talentanskaffelsesteam!

Brandon Lee, Leder af mennesker, 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

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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:

Forståelse af syntaks og grundlæggende funktioner i JavaScript.
Anvendelse af JavaScript ES6 -funktioner såsom pilfunktioner, skabelon -bogstaver og destruktionsopgaver.
Arbejde med asynkron JavaScript inklusive løfter og async/afventer.
Implementering af React Fundamentals som komponenter, rekvisitter og statsledelse.
Brug af React -kroge til funktionel komponenttilstandsstyring.
Forståelse af reaktionskomponentens livscyklus og ved hjælp af livscyklusmetoder.
Håndtering af global stat ved hjælp af Redux State Management.
Håndtering af asynkron API -anmodninger ved hjælp af Redux.
Oprettelse af Redux -handlinger og vælgere til effektiv statsstyring.
Implementering af JavaScript -kodningsløsninger til forskellige problemer.

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, også kendt Som ECMASCRIPT 2015 introducerede flere nye funktioner og forbedringer af JavaScript -sproget. Det inkluderer pilfunktioner, const og lad variabler, skabelon bogstaver og mere. At vurdere denne færdighed i testen hjælper med at bestemme en kandidats fortrolighed med moderne JavaScript -syntaks og deres evne til at skrive kortfattet og effektiv kode af anden kode. Det involverer typisk tilbagekald, løfter og async/afventer syntaks til at håndtere opgaver såsom netværksanmodninger eller fildrift. Denne færdighed er vigtig at måle som reaktion og redux kræver ofte arbejde med asynkrone operationer, såsom hentning af data fra API'er React Library. Dette inkluderer læring om komponenter, rekvisitter, tilstand, livscyklusmetoder, JSX -syntaks og håndtering af begivenheder. Måling af denne færdighed hjælper med at måle en kandidats viden og forståelse af React's byggesten og deres evne til at skabe genanvendelige og effektive UI -komponenter.
React Hooks
React Hooks er et sæt funktioner introduceret i React 16.8, der giver udviklere mulighed for at bruge tilstand og andre reagerende funktioner uden at skrive klassekomponenter. Med kroge kan funktionelle komponenter have deres egen tilstand, livscyklusmetoder og andre funktionaliteter. Denne færdighed er vigtig at måle, da kroge er blevet den foretrukne måde at skrive reagerende komponenter på og forstå dem er vigtig for moderne reaktudvikling.
React Component Lifecycle
React Component Lifecycle refererer til De forskellige faser, som en reaktionskomponent gennemgår fra dens oprettelse til dens fjernelse fra DOM. Det inkluderer metoder som ComponentDidMount, ComponentDidUpDate og ComponentWillunMount. Evaluering af denne færdighed hjælper med at evaluere en kandidats forståelse af komponentlivscyklusmetoder og deres evne til at bruge dem effektivt til opgaver som datahentning eller oprydning. Bibliotek til JavaScript -applikationer, der ofte bruges sammen med React. Det giver en forudsigelig tilstandscontainer og muliggør centraliseret styring af applikationstilstand. Måling af denne færdighed i testen giver rekrutterere mulighed for at vurdere en kandidats færdigheder i at bruge redux til at styre kompleks tilstand og håndtere dataflow inden for en reaktionsprogram Skrivning af handlinger, reduktionsmænd og middleware til håndtering af asynkrone operationer, såsom at fremsætte API -anmodninger i en Redux -applikation. Det inkluderer koncepter som Thunk Middleware, Håndtering af belastning og fejltilstande og opdatering af Redux -butikken med hentede data. Evaluering af denne færdighed hjælper med at bestemme en kandidats evne til at integrere redux med API'er og styre async -arbejdsgange effektivt.
redux -handlinger og vælgere
Redux -handlinger er almindelige JavaScript -objekter, der repræsenterer unikke begivenheder, der kan ske i en applikation. Vælgere er funktioner, der bruges til at udtrække og udlede specifikke data fra Redux -butikken. Evaluering af denne færdighed hjælper med at måle en kandidats forståelse og implementering af redux-handlinger til statsopdateringer og vælgere til effektiv dataindhentning i en redux-baseret applikation.
javaScript-kodning
javascript-kodning henviser til den Evne til at skrive ren, effektiv og vedligeholdelig kode ved hjælp af JavaScript. Det omfatter koncepter som algoritmisk problemløsning, datamanipulation og anvendelse af bedste praksis. Måling af denne færdighed i testen hjælper med at bestemme en kandidats samlede JavaScript -færdighed og deres evne til at skrive kvalitetskode, når de arbejder med React og 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
Asynkron JS
React Fundamentals
Reagere kroge
React Component Lifecycle
Redux State Management
Redux API -håndtering
Redux -handlinger og vælgere
JavaScript -kodning
Funktioner
Variabler
Datatyper
Operatører
Kontrolstrøm
Arrays
Genstande
Klasser
Løfter
Async/venter
Lukninger
Begivenhedsløjfe
JSX
Komponenter
Rekvisitter
Stat
Livscyklusmetoder
Kroge
Kontekst API
Komponenter med højere orden
Statsstyring
Reducere
Handlingsskabere
Redux Store
Middleware
Thunk
Axios
API -integration
Vælgere
Uforanderlige data
Test med spøg
Fejlfinding
Fejlhåndtering
Dom manipulation
Begivenhedshåndtering
Ajax
Hent API
Destructuring
Spred syntaks
Pilfunktioner
Skabelon bogstaver
Hvileparametre
Standardparametre
Moduler
Import Eksport
Klasser
Arv
Prototyper
Arrays
Array -metoder
Array -iteration
Kort
Sæt
Løfter
Generatorer

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

Frontend Developer
React Developer
Redux -udvikler
Senior Redux -udvikler

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

Opbygning af skalerbare og vedligeholdelige reaktiske applikationer.
Optimering af ydeevne i react -applikationer.
Implementering af kodeopdeling og doven belastning i react -applikationer.
Brug af React Router til routing på klientsiden i React-applikationer.
Integrering af tredjepartsbiblioteker og rammer med react-applikationer.
Test af reagerende komponenter ved hjælp af biblioteker som spids og enzym.
Implementering af server-side rendering (SSR) i React-applikationer.
Sikring af react -applikationer ved at implementere godkendelse og tilladelse.
Implementering af datafache og persistens i react -applikationer.
Analyse og fastgørelse af ydelsesproblemer i React og Redux -applikationer.
Design og implementering af skalerbar reduxarkitektur til store applikationer.

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

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Ansættelseslederne mente, at de gennem de tekniske spørgsmål, som de stillede under panelinterviewene, var i stand til at fortælle, hvilke kandidater der havde bedre score og differentieret med dem, der ikke scorede så godt. De er meget tilfreds med kvaliteten af de kandidater, der er nomineret med Adaface-screeningen.

85%

Reduktion i screeningstid

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React & Redux Hiring Test Ofte stillede spørgsmål

Kan jeg kombinere flere færdigheder i en brugerdefineret vurdering?

Ja absolut. Brugerdefinerede vurderinger er oprettet baseret på din jobbeskrivelse og vil omfatte spørgsmål om alle must-have-færdigheder, du angiver.

Har du nogen anti-cheating eller proctoring-funktioner på plads?

Vi har følgende anti-cheating-funktioner på plads:

Ikke-gåbare spørgsmål
IP Proctoring
Webproctoring
Webcam Proctoring
Detektion af plagiering
Sikker browser

Læs mere om Proctoring Features.

Hvordan fortolker jeg testresultater?

Den primære ting at huske på er, at en vurdering er et elimineringsværktøj, ikke et udvælgelsesværktøj. En færdighedsvurdering er optimeret for at hjælpe dig med at eliminere kandidater, der ikke er teknisk kvalificerede til rollen, den er ikke optimeret til at hjælpe dig med at finde den bedste kandidat til rollen. Så den ideelle måde at bruge en vurdering på er at beslutte en tærskelværdi (typisk 55%, vi hjælper dig med benchmark) og inviterer alle kandidater, der scorer over tærsklen for de næste interviewrunder.

Hvilken oplevelsesniveau kan jeg bruge denne test til?

Hver Adaface -vurdering tilpasses til din jobbeskrivelse/ ideel kandidatperson (vores emneeksperter vælger de rigtige spørgsmål til din vurdering fra vores bibliotek på 10000+ spørgsmål). Denne vurdering kan tilpasses til ethvert erfaringsniveau.

Får hver kandidat de samme spørgsmål?

Ja, det gør det meget lettere for dig at sammenligne kandidater. Valgmuligheder for MCQ -spørgsmål og rækkefølgen af spørgsmål randomiseres. Vi har anti-cheating/proctoring funktioner på plads. I vores virksomhedsplan har vi også muligheden for at oprette flere versioner af den samme vurdering med spørgsmål om lignende vanskelighedsniveauer.