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JavaScript, NodeJS & SQL Online Test

About the test:

O teste JavaScript, NodeJS e SQL usa o MCQS baseado em cenário para avaliar os candidatos sobre sua proficiência na linguagem de programação JavaScript, ambiente de tempo de execução do NodeJS e banco de dados SQL. O teste avalia a compreensão dos candidatos sobre tópicos como programação orientada a eventos, programação assíncrona, middleware, conexões de banco de dados, consultas SQL e princípios de design de banco de dados. Os candidatos são avaliados sobre sua capacidade de usar JavaScript e NodeJs para desenvolver aplicativos do lado do servidor, interagir com bancos de dados, design de esquemas de banco de dados e gravar consultas SQL otimizadas e seguras para manipulação e recuperação de dados.

Covered skills:

  • Javascript Basics
  • JS OOPS
  • Node.js e promessas assíncronas
  • Solicite o ciclo de vida da resposta
  • SQL se junta e índices
  • JS ES6
  • APIs de manuseio
  • Sistema de módulo Node.js
  • Operações SQL CRUD
  • Programação JavaScript

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9 reasons why
9 reasons why

Adaface JavaScript, NodeJS & SQL Test is the most accurate way to shortlist Desenvolvedor de pilha completas



Reason #1

Tests for on-the-job skills

The JavaScript, NodeJS & SQL 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:

  • Proficiente no básico do JavaScript
  • Forte entendimento dos conceitos JS ES6
  • Capacidade de aplicar os princípios de JavaScript Oops
  • Experiência em lidar com APIs em JavaScript
  • Familiaridade com a programação assíncrona em node.js e promessas
  • Conhecimento profundo do sistema de módulos Node.js
  • Compreensão do ciclo de vida da resposta de solicitação em Node.js
  • Competência nas operações do SQL CRUD
  • Habilidade em SQL se junta e índices
  • Fortes habilidades de programação JavaScript
  • Erro eficaz e manuseio de exceção
  • Experiência com controle de versão git
Reason #2

No trick questions

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

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

🧐 Question

Medium

Async Await Promises
Promises
Async-Await
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What will the following code output?
 image
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
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Review the following JavaScript code and pick the correct options: 
 image
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
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What will the output of the following JavaScript code be?
 image
 image

Medium

Promise Resolve
Promises
Async-Await
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What does the following code output? 
 image

Easy

Throw, Try, Async
Promises
Async-Await
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What does the following JS code output?
 image

Medium

I/O cycle and main module
Event Loop
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Review the following NodeJS code:
 image
Pick the correct statements:

A: X will be logged after Y always
B: Y will be logged after X always
C: The order of executing timeout and immediate callbacks is non-deterministic and is bound by the performance of the process
D: In this case, the function calls are scheduled in the main module and not in the I/O cycle
E: In this case, the function calls are scheduled in the I/O cycle so setImmediate is always executed before any timers scheduled in the I/O phase, independently of how many timers are left

Easy

Res methods
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If none of the methods (res.download, res.end, res.json, res.jsonp, res.redirect, res.render, res.send, res.sendFile, res.sendStatus) are called from a route handler to terminate request response cycle, what happens to the the client request?
A) Will be left hanging indefinitely

B) Will get an internal server error - 500 

C) Will get a service unavailable error - 503

D) Will be left hanging for a while and then request timeout error - 408

Medium

Phases and Timers
Event Loop
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Review the following NodeJS code:
 image
Pick the correct statements:

A: Adaface will be logged after Lovelace.
B: Lovelace will be logged after Adaface.
C: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback which takes 10 seconds. Only after this is finished, the event loop will execute the timers that are finished. So the timeout call back will actually be executed after 205 ms even though it is scheduled to be run after 200 ms
D: Once the asyncOpThatTakes195ms completes reading the file, it starts executing the callback. While executing the callback, the scheduled timer becomes ready to be executed. So the runtime executes the timer and then completes processing the callback.

Medium

Multi Select
JOIN
GROUP BY
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Consider the following SQL table:
 image
How many rows does the following SQL query return?
 image

Medium

nth highest sales
Nested queries
User Defined Functions
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Consider the following SQL table:
 image
Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
 image

Medium

Select & IN
Nested queries
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Consider the following SQL table:
 image
Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
 image

Medium

Sorting Ubers
Nested queries
Join
Comparison operators
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Consider the following SQL table:
 image
What will be the first two tuples resulting from the following SQL command?
 image

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions
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Consider the following SQL table:
 image
How many tuples does the following query return?
 image

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
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Medium

Bitcoin prices
Axios
Promises

2 mins

JavaScript
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Medium

My Module
Scope

2 mins

JavaScript
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Medium

Promise Resolve
Promises
Async-Await

2 mins

JavaScript
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Easy

Throw, Try, Async
Promises
Async-Await

2 mins

JavaScript
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Medium

I/O cycle and main module
Event Loop

2 mins

NodeJS
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Easy

Res methods

3 mins

NodeJS
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Medium

Phases and Timers
Event Loop

2 mins

NodeJS
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Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
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Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
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Medium

Select & IN
Nested queries

3 mins

SQL
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Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
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Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions

2 mins

SQL
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Easy

Registration Queue
Logic
Queues

30 mins

Coding
Solve

Medium

Visitors Count
Strings
Logic

30 mins

Coding
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Async Await Promises
Promises
Async-Await
JavaScript
Medium2 mins
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Bitcoin prices
Axios
Promises
JavaScript
Medium2 mins
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My Module
Scope
JavaScript
Medium2 mins
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Promise Resolve
Promises
Async-Await
JavaScript
Medium2 mins
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Throw, Try, Async
Promises
Async-Await
JavaScript
Easy2 mins
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I/O cycle and main module
Event Loop
NodeJS
Medium2 mins
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Res methods
NodeJS
Easy3 mins
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Phases and Timers
Event Loop
NodeJS
Medium2 mins
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Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
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nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
Try practice test
Select & IN
Nested queries
SQL
Medium3 mins
Try practice test
Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
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With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
Hard2 mins
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Registration Queue
Logic
Queues
Coding
Easy30 minsSolve
Visitors Count
Strings
Logic
Coding
Medium30 minsSolve
Reason #4

1200+ customers in 75 countries

customers in 75 countries
Brandon

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

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Reason #5

Designed for elimination, not selection

The most important thing while implementing the pre-employment JavaScript, Nodejs & SQL Teste 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 JavaScript, Nodejs & SQL Teste 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.

invite candidates
Reason #7

Detailed scorecards & benchmarks

Ver Scorecard de amostra
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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.

test completion rate
Reason #9

Advanced Proctoring


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About the JavaScript, NodeJS & SQL Assessment Test

Why you should use Pre-employment JavaScript, NodeJS & SQL Online Test?

The JavaScript, Nodejs & SQL Teste 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:

  • Compreendendo e implementando a sintaxe JavaScript básica
  • Usando os recursos do JavaScript ES6
  • Criando e manipulando objetos usando conceitos de javascript oops
  • Trabalhando com APIs para buscar e processar dados
  • Lidar com operações assíncronas no Node.js usando promessas
  • Entendendo e utilizando o sistema de módulos Node.js
  • Compreendendo o ciclo de vida de solicitação-resposta em Node.js
  • Executando operações CRUD no SQL usando JavaScript
  • Utilizando o SQL se junta e índices de maneira eficaz
  • Aplicando conceitos de programação JavaScript para resolver problemas

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, NodeJS & SQL Online Test?

  • 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 JavaScript, Nodejs & SQL Teste to be based on.

    Tipos de dados
    Operadores
    Funções
    Matrizes
    Objetos
    Cordas
    Condicionais
    rotações
    Fechamentos
    Protótipos
    Funções de seta
    Destruição
    Operador de descanso/espalhamento
    Promessas
    Assíncrono/aguardar
    Módulos
    Programação orientada a eventos
    Buffers e fluxos
    Sistema de arquivo
    Módulo HTTP
    Estrutura expressa
    Middleware de manuseio de erros
    Roteamento
    Operações CRUD com SQL
    Linguagem de manipulação de dados
    Linguagem de definição de dados
    Transações
    Índices
    Junta -se
    Normalização
    Funções agregadas
    Junção interna
    Associação à esquerda
    Junção direita
    Junção externa completa
    Retornos de chamada
    Manipulação de erros
    Manipulação de exceção
    Depuração
    Teste
    Expressões regulares
    Gerenciamento de memória
    Variáveis
    Escopos
    Retornos de chamada
    Manipulação de eventos
    Herança baseada em protótipo
    Propagação de erro
    Programação assíncrona
    Fluxo de dados unidirecional
    Dados imutáveis
    Ligação de dados
    Injeção de dependência
    Operações da API da CRUD
    Prometa encadear
    Manipulação de erros com promessas
    Eslint
    Scripts npm
    Comandos git
    Puxar solicitações
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What roles can I use the JavaScript, NodeJS & SQL Online Test for?

  • Desenvolvedor de pilha completa
  • Javascript Developer
  • Desenvolvedor Node.js
  • Desenvolvedor SQL

How is the JavaScript, NodeJS & SQL 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

  • Implementando estruturas de dados e algoritmos JavaScript
  • Otimizando o código JavaScript para desempenho
  • Criando e mantendo APIs RESTful em Node.js
  • Implementando autenticação e autorização em aplicativos Node.js
  • Entendendo e trabalhando com bancos de dados NoSQL em Node.js
  • Usando estruturas e bibliotecas JavaScript (por exemplo, Express, React) para desenvolver aplicativos da Web
  • Implementando o desenvolvimento orientado a testes (TDD) e testes de unidade de escrita para código JavaScript
  • Depuração e solução de problemas de aplicativos JavaScript
  • Utilizando mecanismos de cache e otimizando consultas de banco de dados em node.js
  • Implementando a renderização do lado do servidor (SSR) usando o Node.js Frameworks

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

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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

JavaScript, NodeJS & SQL Hiring Test Perguntas frequentes

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.

Eu sou um candidato. Posso tentar um teste de prática?

Não. Infelizmente, não apoiamos os testes práticos no momento. No entanto, você pode usar nossas perguntas de amostra para prática.

Qual é o custo de usar este teste?

Você pode conferir nossos planos de preços.

Posso obter uma avaliação gratuita?

Sim, você pode se inscrever gratuitamente e visualizar este teste.

Acabei de me mudar para um plano pago. Como posso solicitar uma avaliação personalizada?

Aqui está um guia rápido sobre Como solicitar uma avaliação personalizada no Adaface.

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