Teste online JavaScript

Q: What topics are covered in the Teste online JavaScript?

JavaScript Basics (Matriz; Objetos; Strings; Funções) Estrutura e estilo HTML DOM Erros e manuseio de exceção Trabalhando com dados do usuário e JSON ES6 (funções de seta; destruição; spreads) Funções e fechamentos de ordem superior OOP (classes; construtores; herança prototípica) JavaScript assíncrono (loop de eventos; promessas; assíncrono/aguardar) APIs de manuseio

About the test:

O teste JavaScript usa MCQs baseados em cenários para avaliar os candidatos nos fundamentos do JavaScript (ES5, ES6), capacidade de manipular o HTML DOM e a programação assíncrona com Ajax, buscar API, promessas e assíncronas / aguardar. O teste inclui perguntas de codificação para avaliar as habilidades práticas de programação JavaScript.

Covered skills:

JavaScript Basics (Matriz; Objetos; Strings; Funções)
Erros e manuseio de exceção
ES6 (funções de seta; destruição; spreads)
OOP (classes; construtores; herança prototípica)
APIs de manuseio

Estrutura e estilo HTML DOM
Trabalhando com dados do usuário e JSON
Funções e fechamentos de ordem superior
JavaScript assíncrono (loop de eventos; promessas; assíncrono/aguardar)

Try practice test

Start 14-day free trial

9 reasons why

Adaface Teste online JavaScript is the most accurate way to shortlist Javascript Developers

Reason #1

Tests for on-the-job skills

The Teste online JavaScript 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:

Proficiente no básico do JavaScript, incluindo matrizes, objetos, strings e funções
Conhecimento de estruturação e estilo HTML DOM
Capacidade de lidar com exceções e erros com eficiência
Experiência em trabalhar com dados do usuário e JSON
Familiaridade com recursos ES6, como funções de seta, destruição e spreads
Compreensão das funções e fechamentos de ordem superior
Competência em conceitos de OOP, incluindo classes, construtores e herança prototípica
Capacidade de trabalhar com JavaScript assíncrono usando loop de eventos, promessas e assíncronas
Habilidade em lidar com APIs

Reason #2

No trick questions

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

View sample questions

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

Why we started Adaface

Try practice test

Start 14-day free trial

Reason #3

Non-googleable questions

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

How we design questions

Estes são apenas uma pequena amostra da nossa biblioteca de mais de 10.000 perguntas. As perguntas reais sobre isso Teste online JavaScript será não-googleable.

🧐 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 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 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?
	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

Com o Adaface, conseguimos otimizar nosso processo de seleção inicial em mais de 75%, liberando um tempo precioso tanto para os gerentes de contratação quanto para nossa equipe de aquisição de talentos!

Brandon Lee, Chefe de Pessoas, Love, Bonito

Try practice test

Start 14-day free trial

Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment Teste online JavaScript 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 Teste online JavaScript 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

Ver Scorecard de amostra

Try practice test

Start 14-day free trial

Reason #8

High completion rate

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

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

Reason #9

Advanced Proctoring

Learn more

Preview this test

Ver Scorecard de amostra

About the Teste online JavaScript

Why you should use Teste online JavaScript?

The Teste online JavaScript 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:

Entendendo e aplicando o básico do JavaScript, incluindo matrizes, objetos, strings e funções
Estruturando e modelando elementos HTML DOM usando JavaScript
Manipulação de exceções e erros em JavaScript
Trabalhando com dados do usuário e JSON em JavaScript
Aplicando recursos ES6, como funções de seta, destruturação e spreads
Utilizando funções e fechamentos de ordem superior em JavaScript
Implementando conceitos de programação orientados a objetos, incluindo classes, construtores e herança prototípica em JavaScript
Entendendo e utilizando conceitos de JavaScript assíncronos, como o loop de eventos, promessas e assíncronas

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 Teste online JavaScript?

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 Teste online JavaScript to be based on.
Sintaxe JavaScript
Tipos de dados
Variáveis
Matrizes
Objetos
Cordas
Funções
Manipulação de dom
Estilo CSS
Manipulação de erros
Tente ... Catch Blocks
Jogando exceções
Entrada do usuário
Validação
JSON Parsing
JSON Stringification
ES6 Sintaxe
Funções de seta
Destruição
Operador espalhado
Funções de ordem superior
Fechamentos
Aulas
Construtores
Herança prototípica
Loop de eventos
Promessas
Assíncrono/aguardar
Buscar API
Solicitações XHR
Manuseio de respostas
Lidar com dados JSON
Trabalhando com APIs
Controle de acesso
Compartilhamento de Recursos Cross-Origin
Autenticação
Autorização
Cors
APIs repousantes
Ajax
Funções de retorno de chamada
Promisificar
Manipulação de erros em código assíncrono
Tempo limite e intervalos
XML Parsing
WebSockets
Armazenamento local
Armazenamento de sessão
Cookies do navegador
Testando código JavaScript
Depuração
Otimização de performance
Sistemas de módulo
Ferramentas do Bundler
LING
Qualidade de código
Acessibilidade
Design responsivo
Otimização móvel
Aplicações de página única
Aplicativos da Web progressivos
Trabalhadores da web
WebSockets

Try practice test

Start 14-day free trial

What roles can I use the Teste online JavaScript for?

Javascript Developer
Desenvolvedor front-end
Desenvolvedor de pilha completa
Desenvolvedor da Web
Desenvolvedor UI/UX
Desenvolvedor de aplicativos da web
Desenvolvedor de aplicativos móveis
Desenvolvedor de jogos
Desenvolvedor de software

How is the Teste online JavaScript 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

APIs de manuseio em JavaScript
Aplicando práticas recomendadas de segurança JavaScript para prevenir vulnerabilidades
Trabalhando com diferentes estruturas de dados em JavaScript, como conjuntos e mapas
Implementando técnicas de validação e higienização de dados em JavaScript
Entendendo e solucionando erros de tempo de execução JavaScript comuns
Trabalhando com módulos JavaScript e carregadores de módulos
Implementando Web design responsivo usando JavaScript
Realização de testes de compatibilidade do navegador para JavaScript

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

Preview this test

Ver Scorecard de amostra

Os gerentes de contratação sentiram que, por meio das perguntas técnicas feitas durante as entrevistas do painel, foram capazes de dizer quais candidatos tiveram melhores pontuações e diferenciaram aqueles que não tiveram pontuações tão boas. Eles são altamente satisfeito com a qualidade dos candidatos selecionados na triagem Adaface.

85%

Redução no tempo de triagem

Veja o estudo de caso completo

Teste online JavaScript Perguntas frequentes

Posso avaliar as habilidades da estrutura junto com o JavaScript?

Sim. Fornecemos testes prontos para uso, onde você pode avaliar várias habilidades de JavaScript relevantes em uma única avaliação. Por exemplo, nosso teste javascript + react + html/css pode ser usado para avaliar todos os JS, ReactJs, Html, CSS e habilidades de codificação em uma única avaliação.

Também fornecemos avaliações personalizadas, onde personalizamos a avaliação de acordo com a descrição do seu trabalho.

Posso usar este teste para avaliar o desenvolvedor de back -end JavaScript?

Sim. Este teste é usado para avaliar as principais habilidades JavaScript. As perguntas foram projetadas para avaliar as habilidades JS independentes sem depender do HTML/ CSS. Suponha que sua função exija que os candidatos tenham conhecimento de estruturas JS de back -end, como o NodeJS. Nesse caso, você pode usar o uso de nossa JS Backend Developer avaliação, onde JS e NodeJs e habilidades de codificação são avaliados em um único teste.

Posso usar este teste para o React Native Developer?

Sim. A avaliação está focada nas habilidades JS. Você também pode verificar a Adaface React Avaliação Nativa que avalia o React Native, JS e as habilidades de codificação em um único teste. Você também pode solicitar um teste nativo de reação personalizado que será projetado de acordo com a descrição do seu trabalho.

Posso combinar várias habilidades em uma avaliação personalizada?

Sim absolutamente. As avaliações personalizadas são configuradas com base na descrição do seu trabalho e incluirão perguntas sobre todas as habilidades obrigatórias que você especificar.

Você tem algum recurso anti-trapaça ou procurador?

Temos os seguintes recursos anti-trapaça:

Perguntas não-goleadas
IP Proctoring
Web Proctoring
Proctoring da webcam
Detecção de plágio
navegador seguro

Leia mais sobre os Recursos de Proctoring.

Como interpreto as pontuações dos testes?

O principal a ter em mente é que uma avaliação é uma ferramenta de eliminação, não uma ferramenta de seleção. Uma avaliação de habilidades é otimizada para ajudá -lo a eliminar os candidatos que não são tecnicamente qualificados para o papel, não é otimizado para ajudá -lo a encontrar o melhor candidato para o papel. Portanto, a maneira ideal de usar uma avaliação é decidir uma pontuação limite (normalmente 55%, ajudamos você a comparar) e convidar todos os candidatos que pontuam acima do limiar para as próximas rodadas da entrevista.

Para que nível de experiência posso usar este teste?

Cada avaliação do Adaface é personalizada para a descrição do seu trabalho/ persona do candidato ideal (nossos especialistas no assunto escolherão as perguntas certas para sua avaliação de nossa biblioteca de mais de 10000 perguntas). Esta avaliação pode ser personalizada para qualquer nível de experiência.

Todo candidato recebe as mesmas perguntas?

Sim, facilita muito a comparação de candidatos. As opções para perguntas do MCQ e a ordem das perguntas são randomizadas. Recursos anti-traking/proctoring no local. Em nosso plano corporativo, também temos a opção de criar várias versões da mesma avaliação com questões de níveis de dificuldade semelhantes.