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: Forstå syntaks og grunnleggende funksjoner til JavaScript. Bruke JavaScript ES6 -funksjoner som pilfunksjoner, mallitteraler og ødeleggende oppgaver. Arbeide med asynkron javascript inkludert løfter og async/avventer. Implementering av React Fundamentals som komponenter, rekvisitter og statlig styring. Bruke reagerte kroker for funksjonell komponentstatshåndtering. Forstå react -komponenten livssyklus og bruke livssyklusmetoder. Administrere global stat ved bruk av Redux State Management. Håndtering av asynkrone API -forespørsler ved hjelp av Redux. Opprette redux -handlinger og velgere for effektiv statlig styring. Implementering av JavaScript -kodingsløsninger for forskjellige problemer.

React & Redux Online Test

About the test:

React & Redux-testen bruker scenariobaserte MCQ-er for å evaluere kandidater om sin dyktighet i JavaScript-programmeringsspråk og ReactJS-utvikling ved bruk av Redux. Testen har ett kodingsspørsmål for å evaluere praktisk JavaScript-kodingsopplevelse.

Covered skills:

JavaScript -syntaks
Asynkron js
Reagerer kroker
Redux State Management
Redux handlinger og velgerne

JavaScript ES6
Reagere grunnleggende
React Component Lifecycle
Redux API -håndtering
JavaScript -koding

Try practice test

Start 14-day free trial

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 å bruke React.js effektivt for å bygge dynamiske brukergrensesnitt
I stand til å forstå og implementere Redux for statsledelse
Dyktig i JavaScript syntaks og ES6 -funksjoner
Dyktig i håndtering av asynkrone JavaScript -operasjoner
Erfarne med React Component Lifecycle Methods
Flink til å bruke reagerte kroker for funksjonelle komponenter
Kompetent i håndtering av API -forespørsler og svar med Redux
Dyktig i å skrive redux handlinger og velgerne
I stand til å kode 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

Try practice test

Start 14-day free trial

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 bare en liten prøve fra biblioteket vårt med 10.000+ spørsmål. De faktiske spørsmålene om dette React & Redux Online Test vil være ikke-googlable.

🧐 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 å optimalisere den første screeningsprosessen vår med oppover 75 %, og frigjorde dyrebar tid for både ansettelsesledere og vårt talentanskaffelsesteam!

Brandon Lee, Leder for mennesker, Love, Bonito

Try practice test

Start 14-day free trial

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

Vis eksempler på scorecard

Try practice test

Start 14-day free trial

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

Learn more

Preview this test

Vis eksempler på scorecard

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:

Forstå syntaks og grunnleggende funksjoner til JavaScript.
Bruke JavaScript ES6 -funksjoner som pilfunksjoner, mallitteraler og ødeleggende oppgaver.
Arbeide med asynkron javascript inkludert løfter og async/avventer.
Implementering av React Fundamentals som komponenter, rekvisitter og statlig styring.
Bruke reagerte kroker for funksjonell komponentstatshåndtering.
Forstå react -komponenten livssyklus og bruke livssyklusmetoder.
Administrere global stat ved bruk av Redux State Management.
Håndtering av asynkrone API -forespørsler ved hjelp av Redux.
Opprette redux -handlinger og velgere for effektiv statlig styring.
Implementering av JavaScript -kodingsløsninger for forskjellige 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 Syntax
JavaScript -syntaks refererer til settet med regler som dikterer hvordan JavaScript -kode skal skrives og struktureres. Det inkluderer konsepter som variabler, funksjoner, betingelser, løkker og operatører. Denne ferdigheten er viktig å måle i testen, da den danner grunnlaget for JavaScript -programmering og er avgjørende for enhver utvikler som jobber med React og Redux.
JavaScript ES6
JavaScript ES6, også kjent Som ECMASCRIPT 2015, introduserte flere nye funksjoner og forbedringer av JavaScript -språket. Den inkluderer pilfunksjoner, const og la variabler, mal litteraler og mer. Å vurdere denne ferdigheten i testen hjelper til med å bestemme en kandidats kjennskap til moderne JavaScript -syntaks og deres evne til å skrive kortfattet og effektiv kode.
Asynkron JS
Asynkron JavaScript innebærer å utføre kode uten å blokkere utførelsen av annen kode. Det innebærer vanligvis tilbakeringinger, løfter og async/avventer syntaks for å håndtere oppgaver som nettverksforespørsler eller filoperasjoner. Denne ferdigheten er viktig å måle ettersom React og Redux ofte krever å jobbe med asynkrone operasjoner, for eksempel å hente data fra API -er.
React Fundamentals
React Fundamentals dekker kjernekonseptene og prinsippene i React Library. Dette inkluderer læring om komponenter, rekvisitter, tilstand, livssyklusmetoder, JSX -syntaks og håndtering av hendelser. Måling av denne ferdigheten hjelper til REACT 16.8 som lar utviklere bruke tilstand og andre React -funksjoner uten å skrive klassekomponenter. Med kroker kan funksjonelle komponenter ha sin egen tilstand, livssyklusmetoder og andre funksjonaliteter. Denne ferdigheten er viktig å måle ettersom kroker har blitt den foretrukne måten å skrive React -komponenter og forstå dem er avgjørende for moderne reaktutvikling.
React Component Lifecycle
React Component Lifecycle refererer til De forskjellige fasene som en React -komponent går gjennom fra opprettelsen til fjerning fra DOM. Det inkluderer metoder som ComponentDidMount, ComponentDidupDate og ComponentWillunMount. Å vurdere denne ferdigheten hjelper deg med å evaluere en kandidats forståelse av komponentlivssyklusmetoder og deres evne til å utnytte dem effektivt til oppgaver som dataphetting eller opprydding.
Redux State Management
Redux er en statlig styring Bibliotek for JavaScript -applikasjoner, ofte brukt i forbindelse med React. Det gir en forutsigbar tilstandsbeholder og muliggjør sentralisert styring av søknadsstatus. Måling av denne ferdigheten i testen lar rekrutterere vurdere en kandidats ferdighet i å bruke Redux for å administrere kompleks tilstand og håndtere dataflyt i en React -applikasjon.
Redux API -håndtering
Redux API -håndtering involverer involverer Skrive handlinger, reduksjonsmidler og mellomvare for å håndtere asynkrone operasjoner, for eksempel å komme med API -forespørsler i en Redux -applikasjon. Det inkluderer konsepter som thunk mellomvare, håndtering av lasting og feiltilstander og oppdatering av Redux -butikken med hentet data. Evaluering av denne ferdigheten hjelper deg med å bestemme en kandidats evne til å integrere Redux med API -er og administrere async -arbeidsflyter effektivt.
Redux -handlinger og velgere
Redux -handlinger er vanlige javascript -objekter som representerer unike hendelser som kan skje i en søknad. Velgerne er funksjoner som brukes til å trekke ut og utlede spesifikke data fra Redux -butikken. Å vurdere denne ferdigheten hjelper til Evne til å skrive ren, effektiv og vedlikeholdbar kode ved hjelp av JavaScript. Det omfatter konsepter som algoritmisk problemløsing, datamanipulering og anvendelse av beste praksis. Å måle denne ferdigheten i testen hjelper til med å bestemme en kandidats generelle JavaScript -ferdighet og deres evne til å skrive kvalitetskode når du jobber 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 -syntaks
JavaScript ES6
Asynkron js
Reagere grunnleggende
Reagerer kroker
React Component Lifecycle
Redux State Management
Redux API -håndtering
Redux handlinger og velgerne
JavaScript -koding
Funksjoner
Variabler
Datatyper
Operatører
Kontrollstrøm
Matriser
Objekter
Klasser
Løfter
Async/avventer
Stenginger
Event Loop
JSX
Komponenter
Rekvisitter
Stat
Livssyklusmetoder
Kroker
Kontekst API
Komponenter med høyere orden
Statlig ledelse
Reduserende stoffer
Handlingsskapere
Redux Store
Mellomvare
Thunk
Axios
API -integrasjon
Velgere
Uforanderlige data
Testing med jest
Feilsøking
Feilhåndtering
Dommanipulasjon
Hendelseshåndtering
Ajax
Hente api
Ødeleggelse
Spred syntaks
Pilfunksjoner
Mal litteraler
REST -parametere
Standardparametere
Moduler
Import Eksport
Klasser
Arv
Prototyper
Matriser
Array -metoder
Array Iteration
Kart
Sett
Løfter
Generatorer

Try practice test

Start 14-day free trial

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

Frontend Developer
React Developer
Redux Developer
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

Bygg skalerbare og vedlikeholdbare reagerte applikasjoner.
Optimalisering av ytelse i React -applikasjoner.
Implementering av kode splitting og lat lasting i reagerte applikasjoner.
Bruke React Router for ruting av klientsiden i React-applikasjoner.
Integrering av tredjepartsbiblioteker og rammer med React-applikasjoner.
Testing reagerer komponenter ved bruk av biblioteker som Jest og enzym.
Implementering av gjengivelse av serversiden (SSR) i React-applikasjoner.
Sikre React -applikasjoner ved å implementere autentisering og autorisasjon.
Implementering av databufring og utholdenhet i React -applikasjoner.
Analyse og fikse ytelsesproblemer i React og Redux -applikasjoner.
Designe og implementere skalerbar redux -arkitektur for store applikasjoner.

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

Preview this test

Vis eksempler på scorecard

Ansettelseslederne mente at de gjennom de tekniske spørsmålene de stilte under panelintervjuene, var i stand til å fortelle hvilke kandidater som scoret bedre, og differensierte med de som ikke skåret like godt. De er svært fornøyd med kvaliteten på kandidatene som er på listen med Adaface-screeningen.

85%

Reduksjon i screeningstid

Se hele casestudien

React & Redux Hiring Test Vanlige spørsmål

Kan jeg kombinere flere ferdigheter til en tilpasset vurdering?

Ja absolutt. Tilpassede vurderinger er satt opp basert på stillingsbeskrivelsen din, og vil inneholde spørsmål om alle må-ha ferdigheter du spesifiserer.

Har du noen anti-juksende eller proktoreringsfunksjoner på plass?

Vi har følgende anti-juksede funksjoner på plass:

Ikke-googlable spørsmål
IP Proctoring
Nettproctoring
Webcam Proctoring
Deteksjon av plagiering
Sikker nettleser

Les mer om Proctoring -funksjonene.

Hvordan tolker jeg testresultater?

Den viktigste tingen å huske på er at en vurdering er et eliminasjonsverktøy, ikke et seleksjonsverktøy. En ferdighetsvurdering er optimalisert for å hjelpe deg med å eliminere kandidater som ikke er teknisk kvalifisert for rollen, det er ikke optimalisert for å hjelpe deg med å finne den beste kandidaten for rollen. Så den ideelle måten å bruke en vurdering på er å bestemme en terskelpoeng (vanligvis 55%, vi hjelper deg med å benchmark) og invitere alle kandidater som scorer over terskelen for de neste rundene med intervjuet.

Hvilken opplevelsesnivå kan jeg bruke denne testen til?

Hver ADAFACE -vurdering er tilpasset din stillingsbeskrivelse/ ideell kandidatperson (våre fageksperter vil velge de riktige spørsmålene for din vurdering fra vårt bibliotek med 10000+ spørsmål). Denne vurderingen kan tilpasses for ethvert opplevelsesnivå.

Får hver kandidat de samme spørsmålene?

Ja, det gjør det mye lettere for deg å sammenligne kandidater. Alternativer for MCQ -spørsmål og rekkefølgen på spørsmål er randomisert. Vi har anti-juksing/proctoring funksjoner på plass. I vår bedriftsplan har vi også muligheten til å lage flere versjoner av den samme vurderingen med spørsmål med lignende vanskelighetsnivåer.