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: Förstå syntaxen och grundfunktionerna i JavaScript. Tillämpa JavaScript ES6 -funktioner som pilfunktioner, malllitteraler och förstörande uppdrag. Arbetar med asynkron javascript inklusive löften och async/väntar. Implementera React Fundamentals som komponenter, rekvisita och statlig hantering. Använda React -krokar för funktionell komponentstatshantering. Förstå React -komponentens livscykel och använda livscykelmetoder. Hantera global stat med Redux State Management. Hantering av asynkrona API -förfrågningar med Redux. Skapa Redux -åtgärder och väljare för effektiv statlig ledning. Implementering av JavaScript -kodningslösningar för olika problem.

React & Redux Online Test

About the test:

React & Redux-testet använder scenariobaserade MCQ: er för att utvärdera kandidater om deras kunskaper i JavaScript-programmeringsspråk och ReactJS-utveckling med Redux. Testet har en kodningsfråga för att utvärdera praktisk JavaScript-kodningsupplevelse.

Covered skills:

Javascript -syntax
Asynkron js
Reagera krokar
Redux State Management
Redux -åtgärder och väljare

Javascript es6
Reagera grunderna
React Component LifeCycle
Redux API -hantering
JavaScript -kodning

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9 reasons why

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

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:

Kunna effektivt använda react.js för att bygga dynamiska användargränssnitt
Kapabel att förstå och implementera Redux för statlig ledning
Kunnig i JavaScript -syntax och ES6 -funktioner
Färdig i hantering av asynkrona JavaScript -operationer
Erfaren med React Component Lifecycle Methods
Adept på att använda React -krokar för funktionella komponenter
Kompetent i hantering av API -förfrågningar och svar med Redux
Kunskaper i att skriva Redux -åtgärder och väljare
Kan kodning i JavaScript och lösa programmeringsproblem

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

Dessa är bara ett litet urval från vårt bibliotek med 10 000+ frågor. De faktiska frågorna om detta React & Redux online -test kommer att vara icke-googleable.

🧐 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 kunde vi optimera vår initiala screeningprocess med uppemot 75 %, vilket frigjorde dyrbar tid för både anställande chefer och vårt team för att förvärva talang!

Brandon Lee, Chef för människor, 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:

Förstå syntaxen och grundfunktionerna i JavaScript.
Tillämpa JavaScript ES6 -funktioner som pilfunktioner, malllitteraler och förstörande uppdrag.
Arbetar med asynkron javascript inklusive löften och async/väntar.
Implementera React Fundamentals som komponenter, rekvisita och statlig hantering.
Använda React -krokar för funktionell komponentstatshantering.
Förstå React -komponentens livscykel och använda livscykelmetoder.
Hantera global stat med Redux State Management.
Hantering av asynkrona API -förfrågningar med Redux.
Skapa Redux -åtgärder och väljare för effektiv statlig ledning.
Implementering av JavaScript -kodningslösningar för olika problem.

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 -syntax hänvisar till uppsättningen regler som dikterar hur JavaScript -kod ska skrivas och struktureras. Det inkluderar koncept som variabler, funktioner, villkor, slingor och operatörer. Denna färdighet är viktig att mäta i testet eftersom det utgör grunden för JavaScript -programmering och är avgörande för alla utvecklare som arbetar med React och Redux.
JavaScript ES6
JavaScript ES6, även känd känd Som EcMascript 2015 introducerade flera nya funktioner och förbättringar av JavaScript -språket. Det inkluderar pilfunktioner, const och Let variabler, malllitteraler och mer. Att bedöma denna färdighet i testet hjälper till att bestämma en kandidats kännedom om modern JavaScript -syntax och deras förmåga att skriva kortfattad och effektiv kod.
asynkron JS
asynkron javaScript innebär att utföra kod utan att blockera exekveringen av annan kod. Det involverar vanligtvis återuppringningar, löften och async/väntar syntax för att hantera uppgifter som nätverksförfrågningar eller filoperationer. Denna färdighet är viktig för att mäta som React och Redux kräver ofta att arbeta med asynkrona operationer, såsom att hämta data från API: er.
React Fundamentals
React Fundamentals täcker kärnbegreppen och principerna för The The Principles of the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the the Core Concept React Library. Detta inkluderar att lära sig om komponenter, rekvisita, tillstånd, livscykelmetoder, JSX -syntax och hantering av händelser. Mätning av denna färdighet hjälper till att mäta en kandidats kunskap och förståelse för Reacts byggstenar och deras förmåga att skapa återanvändbara och effektiva UI -komponenter.
React Hooks
React Hooks är en uppsättning funktioner som introduceras i React 16.8 som gör det möjligt för utvecklare att använda tillstånd och andra React -funktioner utan att skriva klasskomponenter. Med krokar kan funktionella komponenter ha sitt eget tillstånd, livscykelmetoder och andra funktionaliteter. Denna färdighet är viktig för att mäta eftersom krokar har blivit det föredragna sättet att skriva reagera komponenter och förstå dem är avgörande för modern reaktionsutveckling.
React Component Lifecycle
React -komponentens livscykel hänvisar till De olika faserna som en React -komponent går igenom från skapandet till dess borttagning från DOM. Det innehåller metoder som ComponentDidMount, ComponentDidUpdate och ComponentWillUnMount. Att bedöma denna färdighet hjälper till att utvärdera en kandidats förståelse av komponentens livscykelmetoder och deras förmåga att använda dem effektivt för uppgifter som data som hämtar eller saneringsoperationer. Bibliotek för JavaScript -applikationer, ofta används i samband med React. Det ger en förutsägbar statlig behållare och möjliggör centraliserad hantering av applikationstillstånd. Att mäta denna färdighet i testet gör det möjligt för rekryterare att bedöma en kandidats kompetens i att använda Redux för att hantera komplexa tillstånd och hantera dataflöde inom en React -applikation.
Redux API -hantering
Redux API -hantering involverar involverar involverar innebär Skrivåtgärder, reducerare och mellanprogram för att hantera asynkrona operationer, till exempel att göra API -förfrågningar i en Redux -applikation. Det innehåller koncept som Thunk Middleware, hantering av lastning och feltillstånd och uppdatering av Redux -butiken med hämtade data. Att utvärdera denna färdighet hjälper till att bestämma en kandidats förmåga att integrera Redux med API: er och hantera async -arbetsflöden effektivt.
Redux -åtgärder och väljare
Redux -åtgärder är vanliga JavaScript -objekt som representerar unika händelser som kan hända i en applikation. Väljare är funktioner som används för att extrahera och härleda specifika data från Redux -butiken. Att bedöma denna färdighet hjälper till att mäta en kandidats förståelse och implementering av Redux-åtgärder för tillståndsuppdateringar och väljare för effektiv datainhämtning i en Redux-baserad applikation.
JavaScript-kodning
JavaScript-kodning hänvisar till den Möjlighet att skriva ren, effektiv och underhållbar kod med JavaScript. Det omfattar koncept som algoritmisk problemlösning, datamanipulation och tillämpning av bästa praxis. Att mäta denna färdighet i testet hjälper till att bestämma en kandidats övergripande JavaScript -kunskaper och deras förmåga att skriva kvalitetskod när du arbetar med React och 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
Reagera grunderna
Reagera krokar
React Component LifeCycle
Redux State Management
Redux API -hantering
Redux -åtgärder och väljare
JavaScript -kodning
Funktioner
Variabler
Datatyper
Operatörer
Styrningsflöde
Matriser
Föremål
Klasser
Löften
Async/vänta
Stängning
Evenemangsslinga
Jsx
Komponenter
Rekvisita
stat
Livscykelmetoder
Krokar
Context API
Komponenter med högre ordning
Statlig ledning
Reducerare
Actionskapare
Redux butik
Mellanvaror
Dunk
Axios
API -integration
Väljare
Oföränderliga data
Testning med skämt
Felsökning
Felhantering
Dommanipulation
Evenemangshantering
Ajax
Hämta API
Förstörande
Spridningssyntax
Pilfunktioner
Malllitteringar
Viloparametrar
Standardparametrar
Moduler
Import Export
Klasser
Arv
Prototyper
Matriser
Matrismetoder
Matris iteration
Karta
Uppsättning
Löften
Generatorer

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

Frontendutvecklare
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

Bygga skalbara och underhållbara React -applikationer.
Optimering av prestanda i React -applikationer.
Implementering av koddelning och lat belastning i React -applikationer.
Använda React Router för klientsidan routing i React-applikationer.
Integrering av tredjepartsbibliotek och ramar med React-applikationer.
Testning av React -komponenter med hjälp av bibliotek som Jest och enzym.
Implementering av serversidan rendering (SSR) i React-applikationer.
Säkra React -applikationer genom att implementera autentisering och auktorisation.
Implementering av datacachning och uthållighet i React -applikationer.
Analysera och fixa prestandaproblem i React och Redux -applikationer.
Designa och implementera skalbar Redux -arkitektur för stora applikationer.

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

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Visa exempelskort

De anställande cheferna upplevde att de genom de tekniska frågorna som de ställde under panelintervjuerna kunde berätta vilka kandidater som hade bättre poäng och särskiljde sig med de som inte fick lika bra poäng. Dom är mycket nöjd med kvaliteten på de kandidater som nominerades med Adaface-screeningen.

85%

minskning av screeningstiden

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React & Redux Hiring Test Vanliga frågor

Kan jag kombinera flera färdigheter till en anpassad bedömning?

Ja absolut. Anpassade bedömningar ställs in baserat på din arbetsbeskrivning och kommer att innehålla frågor om alla måste-ha färdigheter du anger.

Har du några anti-cheating eller proctoring-funktioner på plats?

Vi har följande anti-cheating-funktioner på plats:

Icke-Googleable-frågor
IP -proctoring
webbproctoring
webbkamera proctoring
Detektion av plagiering
säker webbläsare

Läs mer om proctoring -funktionerna.

Hur tolkar jag testresultat?

Det främsta att tänka på är att en bedömning är ett eliminationsverktyg, inte ett urvalsverktyg. En kompetensbedömning är optimerad för att hjälpa dig att eliminera kandidater som inte är tekniskt kvalificerade för rollen, den är inte optimerad för att hjälpa dig hitta den bästa kandidaten för rollen. Så det ideala sättet att använda en bedömning är att bestämma en tröskelpoäng (vanligtvis 55%, vi hjälper dig att jämföra) och bjuda in alla kandidater som gör poäng över tröskeln för nästa intervjurundor.

Vilken erfarenhetsnivå kan jag använda detta test för?

Varje AdaFace -bedömning anpassas till din arbetsbeskrivning/ idealisk kandidatperson (våra ämnesexperter kommer att välja rätt frågor för din bedömning från vårt bibliotek med 10000+ frågor). Denna bedömning kan anpassas för alla erfarenhetsnivåer.

Får varje kandidat samma frågor?

Ja, det gör det mycket lättare för dig att jämföra kandidater. Alternativ för MCQ -frågor och ordningen på frågor randomiseras. Vi har anti-cheating/proctoring -funktioner på plats. I vår företagsplan har vi också möjlighet att skapa flera versioner av samma bedömning med frågor om liknande svårighetsnivåer.

Jag är kandidat. Kan jag prova ett träningstest?

Nej. Tyvärr stöder vi inte övningstester just nu. Du kan dock använda våra exempelfrågor för övning.

Vad är kostnaden för att använda detta test?

Du kan kolla in våra prisplaner.

Kan jag få en gratis provperiod?

Plattformen är helt självbetjänande, så här är ett sätt att gå vidare:

Du kan registrera dig gratis för att få en känsla för hur det fungerar.
Den kostnadsfria provperioden inkluderar en provbedömning (Java/JavaScript) som du hittar i din instrumentpanel när du registrerar dig. Du kan använda den för att granska kvaliteten på frågorna och kandidaternas upplevelse av ett konversationstest på Adaface.
För att granska kvaliteten på frågorna kan du också granska våra offentliga frågor för 50+ färdigheter här.
När du är övertygad om att du vill testa det med riktiga bedömningar och kandidater kan du välja en plan enligt dina krav.