Perché dovresti usare questo test online javascript

Il test online JavaScript è progettato e validato da esperti del settore per aiutare i reclutatori tecnologici e i responsabili delle assunzioni a valutare le capacità di programmazione JavaScript del candidato. Il test JavaScript scherma le seguenti abilità che i responsabili delle assunzioni cercano nei candidati: Fondamenti JavaScript: variabili, if/else, operatori, logica booleana, funzioni, array, oggetti, loop, stringhe ES6: funzioni freccia, distruzione, operatore di spread, concatenamento opzionale (ES2020), ecc. Programmazione orientata agli oggetti: eredità prototipo, funzioni del costruttore (ES5), classi (ES6), incapsulamento, astrazione, ereditarietà e polimorfismo Concetti di core javascript come "this", "call", "bind", funzioni di ordine superiore, chiusure, timer, callback, iife JavaScript asincrono: loop di eventi, promesse, asincronizzazione/attesa Dati JSON dalla fonte API usando AJAX JavaScript nel browser: DOM, Cookies and Events Fundamentals Crea componenti HTML dinamici come punte di utensili, presentazioni, gallerie con miniature Debug di JavaScript utilizzando la console del browser e l'ispettore Esperienza nella progettazione dell'interfaccia utente compatibile tra browser e dispositivo incrociato Le intuizioni generate da questa valutazione possono essere utilizzate dai reclutatori e dai responsabili delle assunzioni per identificare i migliori candidati per il ruolo. Le funzionalità anti-cheatri consentono di sentirti a tuo agio con le valutazioni conducenti online.

Test online JavaScript

About the test:

The JavaScript test uses scenario-based MCQs to evaluate candidates on JavaScript fundamentals (ES5, ES6), ability to manipulate HTML DOM and Asynchronous programming with Ajax, Fetch API, Promises & Async / Await. The test includes coding questions to evaluate hands-on JavaScript programming skills.

Covered skills:

JavaScript basics (arrays; objects; strings; functions)
Errors and Exception Handling
ES6 (arrow functions; destructuring; spreads)
OOP (classes; constructors; prototypal inheritance)
Handling APIs

Structuring and styling HTML DOM
Working with user data and JSON
higher-order functions and closures
Asynchronous JavaScript (event loop; promises; async/await)

See all covered skills

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9 reasons why

Adaface Test online JavaScript is the most accurate way to shortlist JavaScript Developers

Reason #1

Tests for on-the-job skills

Il test online JavaScript è progettato e validato da esperti del settore per aiutare i reclutatori tecnologici e i responsabili delle assunzioni a valutare le capacità di programmazione JavaScript del candidato. Il test JavaScript scherma le seguenti abilità che i responsabili delle assunzioni cercano nei candidati:

Fondamenti JavaScript: variabili, if/else, operatori, logica booleana, funzioni, array, oggetti, loop, stringhe
ES6: funzioni freccia, distruzione, operatore di spread, concatenamento opzionale (ES2020), ecc.
Programmazione orientata agli oggetti: eredità prototipo, funzioni del costruttore (ES5), classi (ES6), incapsulamento, astrazione, ereditarietà e polimorfismo
Concetti di core javascript come "this", "call", "bind", funzioni di ordine superiore, chiusure, timer, callback, iife
JavaScript asincrono: loop di eventi, promesse, asincronizzazione/attesa
Dati JSON dalla fonte API usando AJAX
JavaScript nel browser: DOM, Cookies and Events Fundamentals
Crea componenti HTML dinamici come punte di utensili, presentazioni, gallerie con miniature
Debug di JavaScript utilizzando la console del browser e l'ispettore
Esperienza nella progettazione dell'interfaccia utente compatibile tra browser e dispositivo incrociato

Le intuizioni generate da questa valutazione possono essere utilizzate dai reclutatori e dai responsabili delle assunzioni per identificare i migliori candidati per il ruolo. Le funzionalità anti-cheatri consentono di sentirti a tuo agio con le valutazioni conducenti online.

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.

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 ->

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.

Questi sono solo un piccolo campione della nostra biblioteca di oltre 10.000 domande. Le domande reali su questo JavaScript Online Test sarà non googleabile.

🧐 Question
Medium Async Await Promises Promises Async-Await	Solve
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
Easy Bitcoin prices Axios Promises	Solve
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	Solve
What will the output of the following JavaScript code be?
Medium Promise Resolve Promises Async-Await	Solve
What does the following code output?
Easy Throw, Try, Async Promises Async-Await	Solve
What does the following JS code output?
Easy Registration Queue Logic	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 Longest Road logic hashmaps	Solve
A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor. The input is an array of "strings" which needs to be converted from string to integer/number inside the function.
Medium Visitors Count Strings	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	Solve
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
	Easy Bitcoin prices Axios Promises	2 mins JavaScript	Solve
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	Solve
What will the output of the following JavaScript code be?
	Medium Promise Resolve Promises Async-Await	2 mins JavaScript	Solve
What does the following code output?
	Easy Throw, Try, Async Promises Async-Await	2 mins JavaScript	Solve
What does the following JS code output?
	Easy Registration Queue Logic	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 Longest Road logic hashmaps	25 mins Coding	Solve
A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor. The input is an array of "strings" which needs to be converted from string to integer/number inside the function.
	Medium Visitors Count Strings	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	Solve
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	Easy	2 mins	Solve
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	Solve
What will the output of the following JavaScript code be?
	Promise Resolve Promises Async-Await	JavaScript	Medium	2 mins	Solve
What does the following code output?
	Throw, Try, Async Promises Async-Await	JavaScript	Easy	2 mins	Solve
What does the following JS code output?
	Registration Queue Logic	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
	Longest Road logic hashmaps	Coding	Medium	25 mins	Solve
A startup company E-Motors is building driverless automated cars. The car contains a sensor that checks the road quality for the next N meters to decide the optimal speed at which the cars should move. We are given recorded data by the sensor in the form of an array, where each element of the array is the rating given to 1 meter of the road in sequence. The rating given by the sensor is from 1 to 100, where 100 represents the road with the best condition, and any rating above 60 is optimal. Find the longest stretch of road in meters that is categorized as optimal by the sensor. The input is an array of "strings" which needs to be converted from string to integer/number inside the function.
	Visitors Count Strings	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 di oltre il 75%, liberando un tempo prezioso sia per i responsabili delle assunzioni che per il nostro team di acquisizione di talenti!

Brandon Lee, Capo delle persone, Love, Bonito

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment JavaScript 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.

Reason #6

1 click candidate invites

Email invites: You can send candidates an email invite to the JavaScript 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 & comparative results

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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Come si personalizza il test per gli sviluppatori di Javascript senior?

Le domande per gli sviluppatori senior valutano argomenti avanzati come:

Concetti avanzati come chiusure, ereditarietà prototipica, IIFE
Programmazione avanzata DOM ed eventi
Comprensione JavaScript funziona dietro le quinte: motori, stack di chiamate, sollevamento, scoping, parola chiave "questa", valori di riferimento
Funzioni avanzate: funzioni di freccia, funzioni di prima classe e di ordine superiore, legame e chiusure
Archiviazione di dati con cookie, archiviazione locale e archiviazione sessione
Caching con i lavoratori del servizio
Concetti di networking come Cors e JSONP
Modelli di classe precedente: modello prototipo, modello classico/ costruttore pseudo
Pro e contro di callback, promesse e asincroni/attesa
Strutture di dati avanzate come mappe, set
Collezione dei rifiuti e gestione della memoria
Creazione di un framework javascript personalizzato o libreria
JavaScript Tooling: NPM, pacco, Babele

Inoltre, il test potrebbe consistere in domande che valutano la capacità dei candidati di utilizzare database (come SQL) e framework (come React, Angular, Vue e Shelte).

What roles can I use the JavaScript Online Test for?

JavaScript Developer
Frontend Engineer
Backend JavaScript Developer
Full Stack Software Developer
NodeJS Developer
React Developer
Angular Developer
Software Engineer 1

What topics are covered in the Test online JavaScript?

Tipi e operatori

Loop

Variabili

Funzioni

Array

Oggetti

stringhe

Dom

Fondamenti HTML/ CSS

Chiusure

Iife

Oops

Es6

Matematica

Biscotti

JSON

Async/Aspetta

Promesse

Frecce

Timer

Distruttore

Memoria locale

Archiviazione della sessione

Console

questo ',' call ',' bind 'parole chiave

Gestione degli eventi

La gestione delle eccezioni

Gestione del modulo

Operai di servizio

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I responsabili delle assunzioni hanno ritenuto che attraverso le domande tecniche che hanno posto durante le interviste del panel, sono stati in grado di dire quali candidati avevano punteggi migliori e si sono differenziati con coloro che non hanno segnato. Sono molto soddisfatto Con la qualità dei candidati selezionati con la proiezione di Adaface.

85%

Riduzione del tempo di screening

Visualizza il caso di studio completo

Javascript Online Test FAQs

Posso valutare le competenze del framework insieme a JavaScript?

Sì. Forniamo test pronti in cui è possibile valutare più capacità JavaScript pertinenti in un'unica valutazione. Ad esempio, il nostro test javascript + react + html/css può essere usato per valutare tutti i js, reactJS, html, CSS e abilità di codifica in un'unica valutazione.

Forniamo anche valutazioni personalizzate in cui personalizziamo la valutazione in base alla descrizione del tuo lavoro.

Posso usare questo test per valutare lo sviluppatore JavaScript back -end?

Sì. Questo test viene utilizzato per valutare le capacità di JavaScript di base. Le domande sono progettate per valutare le competenze JS autonome senza dipendere da HTML/ CSS. Supponiamo che il tuo ruolo richieda ai candidati di avere conoscenza dei framework JS backend come Nodejs. In tal caso, puoi esaminare l'utilizzo del nostro JS Backend Developer Assessment, in cui JS e Nodejs e le capacità di codifica sono valutati in un singolo test.

Posso usare questo test per React Native Developer?

Sì. La valutazione è focalizzata sulle competenze JS. Puoi anche controllare l'ADAFACE React Native Assessment che valuta React Native, JS e le capacità di codifica in un unico test. Puoi anche richiedere un test nativo React personalizzato che verrà progettato secondo la descrizione del lavoro.

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.