Why you should use JavaScript, HTML/CSS & React Online Test?

The Test javascript, html/css e react 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: Comprensione della sintassi e dei fondamenti Javascript Conoscenza delle caratteristiche e dell'utilizzo ES6 Capacità di scrivere codice JavaScript orientato agli oggetti Esperienza nella gestione delle API e effettuare chiamate HTTP Competenza nel lavorare con il nodo asincrono. Costruire componenti riutilizzabili con JSX in reazione Comprensione del ciclo di vita dei componenti React Competenza nell'uso di ganci react e componenti funzionali Forte comprensione del modello CSS Box Possibilità di creare layout flessibili utilizzando Flexbox e Grid

JavaScript, HTML/CSS & React Online Test

Q: What topics are covered in the JavaScript, HTML/CSS & React Online Test?

Nozioni di base JavaScript JS ES6 Js oops Gestione delle API Nodo asincrono e promesse Costruire componenti con JSX Reagire il ciclo di vita dei componenti Reagire ganci e componenti funzionali Modello di scatola CSS Layout Flexbox e griglia CSS reattivo Programmazione JavaScript

About the test:

Il test JavaScript, HTML/CSS e React utilizza MCQs basati su scenari per valutare i candidati sulla loro competenza nel linguaggio di programmazione JavaScript, Markup HTML/CSS e Libreria React. Il test valuta la comprensione dei candidati di argomenti come la manipolazione DOM, la gestione degli eventi, il ciclo di vita dei componenti, la gestione dello stato, gli oggetti di scena e il rendering e lo stile CSS. I candidati vengono valutati sulla loro capacità di utilizzare queste tecnologie per risolvere i problemi del mondo reale e sviluppare applicazioni Web reattive e interattive.

Covered skills:

Nozioni di base JavaScript
Js oops
Nodo asincrono e promesse
Reagire il ciclo di vita dei componenti
Modello di scatola CSS
CSS reattivo

JS ES6
Gestione delle API
Costruire componenti con JSX
Reagire ganci e componenti funzionali
Layout Flexbox e griglia
Programmazione JavaScript

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9 reasons why

Adaface JavaScript, HTML/CSS & React Test is the most accurate way to shortlist Sviluppatore di stack completos

Reason #1

Tests for on-the-job skills

The JavaScript, HTML/CSS & React Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

Capacità di gestire in modo efficiente eccezioni ed errori
Competenza nella sintassi e concetti ES6
Comprensione dei principi di programmazione orientati agli oggetti in JavaScript
Conoscenza del lavoro con le API e della gestione delle operazioni asincroni
Esperienza nella costruzione di componenti con JSX
Familiarità con il ciclo di vita dei componenti react
Competenza nell'uso di ganci react e componenti funzionali
Comprensione del modello CSS Box e della sua applicazione
Competenza nella creazione di progetti CSS reattivi
Forti capacità di programmazione JavaScript

Reason #2

No trick questions

Traditional assessment tools use trick questions and puzzles for the screening, which creates a lot of frustration among candidates about having to go through irrelevant screening assessments.

View sample questions

The main reason we started Adaface is that traditional pre-employment assessment platforms are not a fair way for companies to evaluate candidates. At Adaface, our mission is to help companies find great candidates by assessing on-the-job skills required for a role.

Why we started Adaface

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Reason #3

Non-googleable questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

Questi sono solo un piccolo campione della nostra biblioteca di oltre 10.000 domande. Le domande reali su questo Test javascript, html/css e react sarà non googleabile.

🧐 Question
Medium Async Await Promises Promises Async-Await	Try practice test
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
Medium Bitcoin prices Axios Promises	Try practice test
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
Medium My Module Scope	Try practice test
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await	Try practice test
What does the following code output?
Easy Throw, Try, Async Promises Async-Await	Try practice test
What does the following JS code output?
Easy Background Properties	Try practice test
Consider the following shorthand CSS example: background: #f7f7f7 url(jolie.jpg) no-repeat scroll 0px 0px; Which of the following show the individual background properties represented by the shorthand:
Easy Colorful sentences	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? A: Sentence 1 will be gray, Sentence 2 will be pink. B: Both sentences will be gray. C: Sentence 1 will be pink, Sentence 2 will be gray. D: Both sentences will be pink. E: The code does not make sense; will throw an error.
Easy Links	Try practice test
In the following HTML, what will be the color of link with class "mark"
Medium Let's Hack CSS Property	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. A: div{ flex-direction : column; align-items : center; } B: div{ flex-direction : row; align-items: center; } C: div{ flex-direction: column; justify-content: center; } D: div{ flex-direction: row; justify-content: center; }
Hard Context re-renders React Context API Conditional Rendering Component Lifecycle State	Try practice test
Review the following React code: Pick the correct statements: A: The code renders 10 INDIAN RUPEE B: The code renders 10 SINGAPORE DOLLAR C: The code does not render anything and throws an error since JavaScript objects are not valid as React children D: When the currency portion is clicked, the parent component is re-rendered E: When the currency portion is clicked, parent component will skip the re-render because shouldComponentUpdate returns false F: Parent component can be converted to a functional component with memoization (useMemo or memo) to avoid the re-render
Medium Hooks with Conditional Rendering Hooks Conditional Rendering Event Handling	Try practice test
Consider a React functional component that utilizes various hooks and conditional rendering. The component is designed to fetch and display a list of items from an API, with the ability to filter the list based on user input. Here's the pseudo-code structure: In this component, which of the following is a potential issue or inefficiency? A: The component will re-render excessively due to the `setFilter` call. B: The `useEffect` hook will run on every render, causing performance issues. C: The `fetchItems` function may cause a memory leak if the component unmounts during the fetch. D: The `useMemo` hook for `filteredItems` is unnecessary and can be removed without impact. E: The component will fail to display items when the filter is cleared. F: There are no significant issues; the component is implemented optimally.
Medium Rhyme Reducer Reducer functions Immutable update patterns Lazy initialization	Try practice test
Which of the following React code snippets - triggers the reducer ‘rhymeReducer’ to update the ‘song’ value to ‘Jack and Jill’ - renders the updated ‘song’ value - does not produce any errors/warnings
Hard State Handling with Custom Hooks Custom Hooks Context API Event Handling	Try practice test
Consider a React application where a custom hook `useComplexState` is defined to manage a complex state object. The application also uses the Context API to pass down the state and dispatch function. Below is the pseudo-code for the custom hook and a component using it: Given this setup, which of the following statements best describes the potential issue or challenge with `MyComponent`? A: The component will not re-render when the global state changes. B: The `fetchData` function will cause an infinite loop of re-renders. C: The component will lose its state when the global state updates. D: There will be a memory leak due to improper cleanup in `useEffect`. E: The `dispatch` function from `useComplexState` will conflict with the global dispatch. F: There is no issue; the component is implemented correctly.
Easy Registration Queue Logic Queues	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
Medium Visitors Count Strings Logic	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill
	Medium Async Await Promises Promises Async-Await	2 mins JavaScript	Try practice test
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
	Medium Bitcoin prices Axios Promises	2 mins JavaScript	Try practice test
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
	Medium My Module Scope	2 mins JavaScript	Try practice test
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await	2 mins JavaScript	Try practice test
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await	2 mins JavaScript	Try practice test
What does the following JS code output?
	Easy Background Properties	2 mins HTML/CSS	Try practice test
Consider the following shorthand CSS example: background: #f7f7f7 url(jolie.jpg) no-repeat scroll 0px 0px; Which of the following show the individual background properties represented by the shorthand:
	Easy Colorful sentences	2 mins HTML/CSS	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? A: Sentence 1 will be gray, Sentence 2 will be pink. B: Both sentences will be gray. C: Sentence 1 will be pink, Sentence 2 will be gray. D: Both sentences will be pink. E: The code does not make sense; will throw an error.
	Easy Links	2 mins HTML/CSS	Try practice test
In the following HTML, what will be the color of link with class "mark"
	Medium Let's Hack CSS Property	3 mins HTML/CSS	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. A: div{ flex-direction : column; align-items : center; } B: div{ flex-direction : row; align-items: center; } C: div{ flex-direction: column; justify-content: center; } D: div{ flex-direction: row; justify-content: center; }
	Hard Context re-renders React Context API Conditional Rendering Component Lifecycle State	3 mins React	Try practice test
Review the following React code: Pick the correct statements: A: The code renders 10 INDIAN RUPEE B: The code renders 10 SINGAPORE DOLLAR C: The code does not render anything and throws an error since JavaScript objects are not valid as React children D: When the currency portion is clicked, the parent component is re-rendered E: When the currency portion is clicked, parent component will skip the re-render because shouldComponentUpdate returns false F: Parent component can be converted to a functional component with memoization (useMemo or memo) to avoid the re-render
	Medium Hooks with Conditional Rendering Hooks Conditional Rendering Event Handling	3 mins React	Try practice test
Consider a React functional component that utilizes various hooks and conditional rendering. The component is designed to fetch and display a list of items from an API, with the ability to filter the list based on user input. Here's the pseudo-code structure: In this component, which of the following is a potential issue or inefficiency? A: The component will re-render excessively due to the `setFilter` call. B: The `useEffect` hook will run on every render, causing performance issues. C: The `fetchItems` function may cause a memory leak if the component unmounts during the fetch. D: The `useMemo` hook for `filteredItems` is unnecessary and can be removed without impact. E: The component will fail to display items when the filter is cleared. F: There are no significant issues; the component is implemented optimally.
	Medium Rhyme Reducer Reducer functions Immutable update patterns Lazy initialization	3 mins React	Try practice test
Which of the following React code snippets - triggers the reducer ‘rhymeReducer’ to update the ‘song’ value to ‘Jack and Jill’ - renders the updated ‘song’ value - does not produce any errors/warnings
	Hard State Handling with Custom Hooks Custom Hooks Context API Event Handling	3 mins React	Try practice test
Consider a React application where a custom hook `useComplexState` is defined to manage a complex state object. The application also uses the Context API to pass down the state and dispatch function. Below is the pseudo-code for the custom hook and a component using it: Given this setup, which of the following statements best describes the potential issue or challenge with `MyComponent`? A: The component will not re-render when the global state changes. B: The `fetchData` function will cause an infinite loop of re-renders. C: The component will lose its state when the global state updates. D: There will be a memory leak due to improper cleanup in `useEffect`. E: The `dispatch` function from `useComplexState` will conflict with the global dispatch. F: There is no issue; the component is implemented correctly.
	Easy Registration Queue Logic Queues	30 mins Coding	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Medium Visitors Count Strings Logic	30 mins Coding	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

	🧐 Question	🔧 Skill	💪 Difficulty	⌛ Time
	Async Await Promises Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What will the following code output? A: 24 after 5 seconds and after another 5 seconds, another 24 B: 24 followed by another 24 immediately C: 24 immediately and another 24 after 5 seconds D: After 5 seconds, 24 and 24 E: Undefined F: NaN G: None of these
	Bitcoin prices Axios Promises	JavaScript	Medium	2 mins	Try practice test
Review the following JavaScript code and pick the correct options: Assume that the API returns a successful 200 response code and a JSON object as the response body. What would the value of ‘a’ be after the code is executed?
	My Module Scope	JavaScript	Medium	2 mins	Try practice test
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await	JavaScript	Medium	2 mins	Try practice test
What does the following code output?
	Throw, Try, Async Promises Async-Await	JavaScript	Easy	2 mins	Try practice test
What does the following JS code output?
	Background Properties	HTML/CSS	Easy	2 mins	Try practice test
Consider the following shorthand CSS example: background: #f7f7f7 url(jolie.jpg) no-repeat scroll 0px 0px; Which of the following show the individual background properties represented by the shorthand:
	Colorful sentences	HTML/CSS	Easy	2 mins	Try practice test
Our intern is writing a colorful blog post, and has written the following code. What colors will the sentences be? A: Sentence 1 will be gray, Sentence 2 will be pink. B: Both sentences will be gray. C: Sentence 1 will be pink, Sentence 2 will be gray. D: Both sentences will be pink. E: The code does not make sense; will throw an error.
	Links	HTML/CSS	Easy	2 mins	Try practice test
In the following HTML, what will be the color of link with class "mark"
	Let's Hack CSS Property	HTML/CSS	Medium	3 mins	Try practice test
Consider the following HTML and CSS: Which additional CSS rule(s) will render the following image? Choose ALL that apply. A: div{ flex-direction : column; align-items : center; } B: div{ flex-direction : row; align-items: center; } C: div{ flex-direction: column; justify-content: center; } D: div{ flex-direction: row; justify-content: center; }
	Context re-renders React Context API Conditional Rendering Component Lifecycle State	React	Hard	3 mins	Try practice test
Review the following React code: Pick the correct statements: A: The code renders 10 INDIAN RUPEE B: The code renders 10 SINGAPORE DOLLAR C: The code does not render anything and throws an error since JavaScript objects are not valid as React children D: When the currency portion is clicked, the parent component is re-rendered E: When the currency portion is clicked, parent component will skip the re-render because shouldComponentUpdate returns false F: Parent component can be converted to a functional component with memoization (useMemo or memo) to avoid the re-render
	Hooks with Conditional Rendering Hooks Conditional Rendering Event Handling	React	Medium	3 mins	Try practice test
Consider a React functional component that utilizes various hooks and conditional rendering. The component is designed to fetch and display a list of items from an API, with the ability to filter the list based on user input. Here's the pseudo-code structure: In this component, which of the following is a potential issue or inefficiency? A: The component will re-render excessively due to the `setFilter` call. B: The `useEffect` hook will run on every render, causing performance issues. C: The `fetchItems` function may cause a memory leak if the component unmounts during the fetch. D: The `useMemo` hook for `filteredItems` is unnecessary and can be removed without impact. E: The component will fail to display items when the filter is cleared. F: There are no significant issues; the component is implemented optimally.
	Rhyme Reducer Reducer functions Immutable update patterns Lazy initialization	React	Medium	3 mins	Try practice test
Which of the following React code snippets - triggers the reducer ‘rhymeReducer’ to update the ‘song’ value to ‘Jack and Jill’ - renders the updated ‘song’ value - does not produce any errors/warnings
	State Handling with Custom Hooks Custom Hooks Context API Event Handling	React	Hard	3 mins	Try practice test
Consider a React application where a custom hook `useComplexState` is defined to manage a complex state object. The application also uses the Context API to pass down the state and dispatch function. Below is the pseudo-code for the custom hook and a component using it: Given this setup, which of the following statements best describes the potential issue or challenge with `MyComponent`? A: The component will not re-render when the global state changes. B: The `fetchData` function will cause an infinite loop of re-renders. C: The component will lose its state when the global state updates. D: There will be a memory leak due to improper cleanup in `useEffect`. E: The `dispatch` function from `useComplexState` will conflict with the global dispatch. F: There is no issue; the component is implemented correctly.
	Registration Queue Logic Queues	Coding	Easy	30 mins	Solve
We want to register students for the next semester. All students have a receipt which shows the amount pending for the previous semester. A positive amount (or zero) represents that the student has paid extra fees, and a negative amount represents that they have pending fees to be paid. The students are in a queue for the registration. We want to arrange the students in a way such that the students who have a positive amount on the receipt get registered first as compared to the students who have a negative amount. We are given a queue in the form of an array containing the pending amount. For example, if the initial queue is [20, 70, -40, 30, -10], then the final queue will be [20, 70, 30, -40, -10]. Note that the sequence of students should not be changed while arranging them unless required to meet the condition. ⚠️⚠️⚠️ Note: - The first line of the input is the length of the array. The second line contains all the elements of the array. - The input is already parsed into an array of "strings" and passed to a function. You will need to convert string to integer/number type inside the function. - You need to "print" the final result (not return it) to pass the test cases. For the example discussed above, the input will be: 5 20 70 -40 30 -10 Your code needs to print the following to the standard output: 20 70 30 -40 -10
	Visitors Count Strings Logic	Coding	Medium	30 mins	Solve
A manager hires a staff member to keep a record of the number of men, women, and children visiting the museum daily. The staff will note W if any women visit, M for men, and C for children. You need to write code that takes the string that represents the visits and prints the count of men, woman and children. The sequencing should be in decreasing order. Example: Input: WWMMWWCCC Expected Output: 4W3C2M Explanation: ‘W’ has the highest count, then ‘C’, then ‘M’. ⚠️⚠️⚠️ Note: - The input is already parsed and passed to a function. - You need to "print" the final result (not return it) to pass the test cases. - If the input is- “MMW”, then the expected output is "2M1W" since there is no ‘C’. - If any of them have the same count, the output should follow this order - M, W, C.

Reason #4

1200+ customers in 75 countries

Con Adaface siamo stati in grado di ottimizzare il nostro processo di screening iniziale fino al 75%, liberando tempo prezioso sia per i responsabili delle assunzioni che per il nostro team di acquisizione dei talenti!

Brandon Lee, Capo del Popolo, Love, Bonito

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Test javascript, html/css e react 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 Test javascript, html/css e react 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

Visualizza la scorecard campione

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Reason #8

High completion rate

Adaface tests are conversational, low-stress, and take just 25-40 mins to complete.

This is why Adaface has the highest test-completion rate (86%), which is more than 2x better than traditional assessments.

Reason #9

Advanced Proctoring

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About the JavaScript, HTML/CSS & React Assessment Test

Why you should use Pre-employment JavaScript, HTML/CSS & React Online Test?

The Test javascript, html/css e react 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:

Comprensione della sintassi e dei fondamenti Javascript
Conoscenza delle caratteristiche e dell'utilizzo ES6
Capacità di scrivere codice JavaScript orientato agli oggetti
Esperienza nella gestione delle API e effettuare chiamate HTTP
Competenza nel lavorare con il nodo asincrono.
Costruire componenti riutilizzabili con JSX in reazione
Comprensione del ciclo di vita dei componenti React
Competenza nell'uso di ganci react e componenti funzionali
Forte comprensione del modello CSS Box
Possibilità di creare layout flessibili utilizzando Flexbox e Grid

Once the test is sent to a candidate, the candidate receives a link in email to take the test. For each candidate, you will receive a detailed report with skills breakdown and benchmarks to shortlist the top candidates from your pool.

What topics are covered in the JavaScript, HTML/CSS & React Online Test?

Basici JavaScript
Basics JavaScript si riferisce alla conoscenza e alla comprensione fondamentali del linguaggio di programmazione JavaScript. Include concetti come variabili, tipi di dati, operatori, condizionali, loop, funzioni e sintassi di base. Questa abilità è misurata nel test per valutare la conoscenza fondamentale del candidato di JavaScript, che è essenziale per qualsiasi ruolo di sviluppatore JavaScript.
JS ES6
JS ES6 (Ecmascript 2015) si riferisce al fatto Ultima versione del linguaggio JavaScript. Include nuove funzionalità e miglioramenti della sintassi, come funzioni di freccia, classi, moduli, letterali modello, distruzione e sintassi di diffusione. Questa abilità viene misurata nel test per valutare la competenza del candidato nell'uso delle caratteristiche moderne e più efficienti di JavaScript.
JS oops
JS OOPS (programmazione orientata agli oggetti) si riferisce a Paradigma dell'organizzazione e della strutturazione del codice usando oggetti e classi. Implica concetti come l'incapsulamento, l'eredità e il polimorfismo. Questa abilità è misurata nel test per valutare la capacità del candidato di progettare e implementare soluzioni orientate agli oggetti in JavaScript, che è ampiamente utilizzata nello sviluppo web.
Gestione delle API
La gestione delle API La capacità di interagire e consumare interfacce di programmazione dell'applicazione (API). Include le richieste HTTP, l'analisi dei dati JSON, la gestione dell'autenticazione e le risposte di elaborazione. Questa abilità è misurata nel test per valutare le conoscenze e l'esperienza pratica del candidato nell'integrazione di applicazioni Web con servizi esterni attraverso le interazioni API. Si riferisce alla possibilità di scrivere codice asincrono usando node.js, un ambiente di runtime JavaScript. Implica l'uso di callback, promesse e asincroni/attesa per gestire le operazioni asincrone in modo efficiente. Questa abilità viene misurata nel test per valutare la competenza del candidato nello scrivere codice JavaScript non bloccante e scalabile in un ambiente Node.js.
Costruire componenti con JSX
Building Components con JSX Comprende la creazione di componenti dell'interfaccia utente riutilizzabili usando la sintassi JSX, che è un'estensione a JavaScript comunemente usato nelle applicazioni di reazione. Include concetti come composizione componente, oggetti di scena e gestione dello stato. Questa abilità viene misurata nel test per valutare la capacità del candidato di sviluppare componenti dell'interfaccia utente modulari e riutilizzabili usando JSX in combinazione con JavaScript. Fase e metodi coinvolti nel ciclo di vita di un componente React, come il montaggio, l'aggiornamento e il non montaggio. Include metodi come ComponentDidMount, ComponentDidupdate e ComponentWillunmount. Questa abilità viene misurata nel test per valutare la comprensione e la conoscenza pratica del candidato su come i componenti reatti si comportano e interagiscono con il DOM durante il loro ciclo di vita.
React hooks e componenti funzionali
ganci reagi e i componenti funzionali si riferiscono alla nuova funzionalità introdotta in React 16.8 che consente agli sviluppatori di utilizzare lo stato e altre funzionalità di reazione senza scrivere una classe. Implica l'uso di ganci come usestate, useeffect, usecontext e useref. Questa abilità viene misurata nel test per valutare la competenza del candidato nell'uso di ganci e componenti funzionali per costruire applicazioni react scalabili e manteneabili. di come gli elementi sono resi e strutturati in CSS. Include proprietà come larghezza, altezza, imbottitura, margine e bordo. Questa abilità viene misurata nel test per valutare la comprensione del candidato di come gli elementi sono dimensionati, posizionati e distanziati in CSS, il che è cruciale per la creazione di layout web visivamente accattivanti e reattivi.
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 Test javascript, html/css e react to be based on.
Variabili
Tipi di dati
Operazioni aritmetiche
Dichiarazioni condizionali
Loop
Funzioni
Array
Oggetti
Gestione degli errori
Ambito lessicale
Chiusure
Sollevamento
Prototipi
Classi
Eredità
Moduli ES6
Funzioni di freccia
Distruttore
Letterali modello
Operatore di diffusione
Parametri di riposo
Oggetto promettente
Asincrone/attesa
Ajax
API Fetch
JSON
Manipolazione DOM
Gestione degli eventi
Archiviazione del browser
Reagire componenti
JSX
Oggetti di scena
Stato
Metodi del ciclo di vita
Reagire i ganci
API di contesto
Styling in React
Selettori CSS
Modello di scatola
Flexbox
Layout della griglia
Query dei media
Design reattivo
Debug
Test unitari
Ottimizzazione del codice
Design dell'algoritmo
Strutture di dati
Gestione degli errori
Revisione del codice

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What roles can I use the JavaScript, HTML/CSS & React Online Test for?

Sviluppatore di stack completo
Sviluppatore JavaScript
React Developer
Ingegnere front-end

How is the JavaScript, HTML/CSS & React Online Test customized for senior candidates?

For intermediate/ experienced candidates, we customize the assessment questions to include advanced topics and increase the difficulty level of the questions. This might include adding questions on topics like

Esperienza nella creazione di progetti reattivi con CSS
Competenza nella programmazione JavaScript
Conoscenza avanzata di framework e librerie Javascript
Esperienza con strumenti di build front-end come Webpack o Babele
Capacità di ottimizzare le prestazioni Web e ottimizzare il rendering
Conoscenza delle librerie di gestione dello stato come Redux o MOBX
Esperienza con framework di test come jest o enzima
Capacità di integrare con API e servizi di terze parti
Comprensione dei sistemi di controllo della versione come Git
Esperienza nel debug e nella risoluzione dei problemi complessi
Forti capacità di risoluzione dei problemi e capacità di analizzare i requisiti

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

Preview this test

Visualizza la scorecard campione

I responsabili delle assunzioni hanno ritenuto che, attraverso le domande tecniche poste durante le interviste del panel, erano in grado di individuare quali candidati avevano ottenuto i punteggi migliori e di differenziarli da quelli che non avevano ottenuto altrettanto punteggio. Sono altamente soddisfatto con la qualità dei candidati selezionati con lo screening Adaface.

85%

Riduzione del tempo di screening

Visualizza il caso di studio completo

JavaScript, HTML/CSS & React Hiring Test Domande frequenti

Posso combinare più competenze in una valutazione personalizzata?

Si assolutamente. Le valutazioni personalizzate sono impostate in base alla descrizione del tuo lavoro e includeranno domande su tutte le competenze indispensabili che specificate.

Hai in atto delle caratteristiche anti-cheat o procuratore?

Abbiamo in atto le seguenti caratteristiche anti-cheat:

Domande non googiche
Proctoring IP
procuratore web
Proctor di webcam
Rilevamento del plagio
Sicuro browser

Leggi di più sulle caratteristiche di procuratore.

Come interpreto i punteggi dei test?

La cosa principale da tenere a mente è che una valutazione è uno strumento di eliminazione, non uno strumento di selezione. Una valutazione delle competenze è ottimizzata per aiutarti a eliminare i candidati che non sono tecnicamente qualificati per il ruolo, non è ottimizzato per aiutarti a trovare il miglior candidato per il ruolo. Quindi il modo ideale per utilizzare una valutazione è decidere un punteggio di soglia (in genere il 55%, ti aiutiamo a benchmark) e invitiamo tutti i candidati che segnano al di sopra della soglia per i prossimi round di intervista.

Per quale livello di esperienza posso usare questo test?

Ogni valutazione di Adaface è personalizzata per la descrizione del tuo lavoro/ personaggio del candidato ideale (i nostri esperti in materia sceglieranno le domande giuste per la tua valutazione dalla nostra biblioteca di oltre 10000 domande). Questa valutazione può essere personalizzata per qualsiasi livello di esperienza.

Ogni candidato riceve le stesse domande?

Sì, ti rende molto più facile confrontare i candidati. Le opzioni per le domande MCQ e l'ordine delle domande sono randomizzate. Abbiamo anti-cheatri/procuratore in atto. Nel nostro piano aziendale, abbiamo anche la possibilità di creare più versioni della stessa valutazione con questioni di difficoltà simili.