Por qué debería usar esta prueba en línea de JavaScript

La prueba en línea de JavaScript está diseñada y validada por expertos de la industria para ayudar a los reclutadores tecnológicos y contratando a los gerentes a evaluar las habilidades de programación de JavaScript del candidato. La prueba de JavaScript muestra las siguientes habilidades que los gerentes de contratación buscan en los candidatos: Fundamentos de JavaScript: variables, si/else, operadores, lógica booleana, funciones, matrices, objetos, bucles, cuerdas ES6: Funciones de flecha, destructación, operador de propagación, encadenamiento opcional (ES2020), etc. Programación orientada a objetos: herencia prototípica, funciones de constructor (ES5), clases (ES6), encapsulación, abstracción, herencia y polimorfismo Conceptos básicos de JavaScript como 'this', 'llamar', 'vincular', funciones de orden superior, cierres, temporizadores, devoluciones de llamada, iife Javascript asíncrono: bucle de eventos, promesas, async/espera Datos JSON de la fuente API usando AJAX JavaScript en el navegador: DOM, Fundamentos de Cookies and Events Cree componentes HTML dinámicos como información sobre herramientas, presentaciones de diapositivas, galerías con miniaturas Depuración de JavaScript usando la consola de navegador e inspector Experiencia en el diseño de la interfaz de usuario de los navegadores y la interfaz de usuario compatible con los dispositivos cruzados Los reclutadores y los gerentes de contratación pueden utilizar las ideas generadas a partir de esta evaluación para identificar a los mejores candidatos para el papel. Las características anti-trato le permiten sentirse cómodo realizando evaluaciones en línea.

JavaScript Online Test

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 JavaScript Online Test is the most accurate way to shortlist JavaScript Developers

Reason #1

Tests for on-the-job skills

La prueba en línea de JavaScript está diseñada y validada por expertos de la industria para ayudar a los reclutadores tecnológicos y contratando a los gerentes a evaluar las habilidades de programación de JavaScript del candidato. La prueba de JavaScript muestra las siguientes habilidades que los gerentes de contratación buscan en los candidatos:

Fundamentos de JavaScript: variables, si/else, operadores, lógica booleana, funciones, matrices, objetos, bucles, cuerdas
ES6: Funciones de flecha, destructación, operador de propagación, encadenamiento opcional (ES2020), etc.
Programación orientada a objetos: herencia prototípica, funciones de constructor (ES5), clases (ES6), encapsulación, abstracción, herencia y polimorfismo
Conceptos básicos de JavaScript como 'this', 'llamar', 'vincular', funciones de orden superior, cierres, temporizadores, devoluciones de llamada, iife
Javascript asíncrono: bucle de eventos, promesas, async/espera
Datos JSON de la fuente API usando AJAX
JavaScript en el navegador: DOM, Fundamentos de Cookies and Events
Cree componentes HTML dinámicos como información sobre herramientas, presentaciones de diapositivas, galerías con miniaturas
Depuración de JavaScript usando la consola de navegador e inspector
Experiencia en el diseño de la interfaz de usuario de los navegadores y la interfaz de usuario compatible con los dispositivos cruzados

Los reclutadores y los gerentes de contratación pueden utilizar las ideas generadas a partir de esta evaluación para identificar a los mejores candidatos para el papel. Las características anti-trato le permiten sentirse cómodo realizando evaluaciones en línea.

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.

These are just a small sample from our library of 10,000+ questions. The actual questions on this JavaScript Online Test will be non-googleable.

🧐 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

With Adaface, we were able to optimise our initial screening process by upwards of 75%, freeing up precious time for both hiring managers and our talent acquisition team alike!

Brandon Lee, Head of People, 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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¿Cómo se personaliza la prueba para los desarrolladores de JavaScript senior?

Las preguntas para los desarrolladores senior evalúan temas avanzados como:

Conceptos avanzados como cierres, herencia prototípica, Iifes
Programación DOM avanzada y eventos
Comprender JavaScript funciona detrás de escena: motores, la pila de llamadas, elevación, alcance, la palabra clave 'esta', valores de referencia
Funciones avanzadas: funciones de flecha, funciones de primera clase y de orden superior, enlace y cierres
Almacenamiento de datos con cookies, almacenamiento local y almacenamiento de sesión
almacenamiento en caché con trabajadores de servicio
Conceptos de redes como Cors y JSONP
Patrones de clase anteriores: patrón prototipo, patrón pseudo clásico/ constructor
pros y contras de devoluciones de llamada, promesas y async/espera
Estructuras de datos avanzadas como mapas, conjuntos
Recolección de basura y gestión de la memoria
Creación de un marco o biblioteca JavaScript personalizado
Herramientas de JavaScript: NPM, paquete, Babel

Además, la prueba puede consistir en preguntas que evalúan la capacidad de los candidatos para usar bases de datos (como SQL) y marcos (como React, Angular, Vue y Svelte).

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 JavaScript Online Test?

Tipos y operadores

Bucles

Variables

Funciones

Matrices

Objetos

Instrumentos de cuerda

Domina

Fundamentos HTML/ CSS

Cierre

Iife

Ups

ES6

Matemáticas

Galletas

Json

Asíncrito/espera

Promesas

Flechas

Temporizadores

Destructor

Almacenamiento local

Almacenamiento de sesión

Consola

Esta ',' llamar ',' BIND 'Palabras clave

Manejo de eventos

Manejo de excepciones

Manejo de forma

Trabajadores de servicio

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The hiring managers felt that through the technical questions that they asked during the panel interviews, they were able to tell which candidates had better scores, and differentiated with those who did not score as well. They are highly satisfied with the quality of candidates shortlisted with the Adaface screening.

85%

reduction in screening time

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Javascript Online Test FAQs

¿Puedo evaluar las habilidades marco junto con JavaScript?

Sí. Proporcionamos pruebas listas para llevar donde puede evaluar múltiples habilidades relevantes de JavaScript en una sola evaluación. Por ejemplo, nuestra prueba JavaScript + React + HTML/CSS puede usarse para evaluar todos los js, reactjs, html, CSS y habilidades de codificación en una sola evaluación.

También proporcionamos evaluaciones personalizadas donde personalizamos la evaluación de acuerdo con la descripción de su trabajo.

¿Puedo usar esta prueba para evaluar el desarrollador de Backend JavaScript?

Sí. Esta prueba se utiliza para evaluar las habilidades principales de JavaScript. Las preguntas están diseñadas para evaluar las habilidades JS independientes sin depender de HTML/ CSS. Supongamos que su papel requiere que los candidatos tengan conocimiento de los marcos JS de backend como NodeJ. En ese caso, puede considerar el uso de nuestra Evaluación del desarrollador de backend, donde JS y NodeJ y habilidades de codificación se evalúan en un solo prueba.

¿Puedo usar esta prueba para React Native Developer?

Sí. La evaluación se centra en las habilidades JS. También puede consultar el AdaFace React Native Evalation que evalúa React nativo, JS y habilidades de codificación en una sola prueba. También puede solicitar una prueba nativa React personalizada que se diseñará según la descripción de su trabajo.

¿Puedo combinar múltiples habilidades en una evaluación personalizada?

Si, absolutamente. Las evaluaciones personalizadas se configuran en función de la descripción de su trabajo e incluirán preguntas sobre todas las habilidades imprescindibles que especifique.

¿Tiene alguna característica anti-trato o procuración en su lugar?

Tenemos las siguientes características anti-trate en su lugar:

Preguntas no postradas
Procuración de IP
Procedor web
Procedores de cámara web
Detección de plagio
navegador seguro

Lea más sobre las funciones de procuración.

¿Cómo interpreto los puntajes de las pruebas?

Lo principal a tener en cuenta es que una evaluación es una herramienta de eliminación, no una herramienta de selección. Una evaluación de habilidades está optimizada para ayudarlo a eliminar a los candidatos que no están técnicamente calificados para el rol, no está optimizado para ayudarlo a encontrar el mejor candidato para el papel. Por lo tanto, la forma ideal de usar una evaluación es decidir un puntaje umbral (generalmente del 55%, lo ayudamos a comparar) e invitar a todos los candidatos que obtienen un puntaje por encima del umbral para las próximas rondas de la entrevista.

¿Para qué nivel de experiencia puedo usar esta prueba?

Cada evaluación de AdaFace está personalizada para su descripción de trabajo/ persona candidata ideal (nuestros expertos en la materia elegirán las preguntas correctas para su evaluación de nuestra biblioteca de más de 10000 preguntas). Esta evaluación se puede personalizar para cualquier nivel de experiencia.

¿Cada candidato tiene las mismas preguntas?

Sí, te hace mucho más fácil comparar los candidatos. Las opciones para las preguntas de MCQ y el orden de las preguntas son aleatorizados. Tenemos características anti-trato/procuración en su lugar. En nuestro plan empresarial, también tenemos la opción de crear múltiples versiones de la misma evaluación con cuestiones de niveles de dificultad similares.