JavaScript, Node.js, and SQL Online Test

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The JavaScript, Node.js, and SQL online test assesses candidates' knowledge of programming in the JavaScript language, specific Node.js features, and their ability to use SQL.

It's an ideal test for pre-employment screening. A good Node.js developer needs to be able not only to solve problems using Node.js but also to write and analyze SQL queries to access a database.

This online test requires candidates to solve coding problems in JavaScript, to answer multiple-choice and fill in the blanks questions about Node.js, and to write SQL queries that extract, combine, and manipulate data.

Recommended Job Roles
Back-End Developer
JavaScript Developer
Node.js Developer
SQL Developer
Sample Candidate Report

Sample Free Questions



Node.js NPM Public

Consider the following package.json for a Node.js application:

  "name": "skill-measure-app",
  "private": true,
  "version": "1.0.0",
  "main": "lib/main.js",
  "scripts": {
    "build": "npm run cleanup & npm run test & npm run publish",
    "cleanup": "rm -fr ./lib",
    "test": "jest",
    "publish": "npm publish lib"
  "dependencies": {
     "jest": "^23.0.1",
     "custom-package": "file:../custom-package"

Select all the correct statements.

(Select all acceptable answers.)



JavaScript Error handling Language Public

Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.



SQL Aggregation Select Public

Given the following data definition, write a query that returns the number of students whose first name is John. String comparisons should be case sensitive.

TABLE students
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL
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Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Filter, Positive Numbers, Function Wrapper, Double, Truthy Expressions, Roads, Table of Names, Word Count, Cards, New Folder, Log Patch, Loading Bar, Ingredients, Array Search, Read Files, Fahrenheit Converter, Reorder, Shopping Cart, Weather Data, Segment, Hobbies, A Tag, ATM Locations, Authors, Autocomplete, Ban Users, Bank Branches, Cheapest Product, Confirm, Countries, Date Transform, Department Report, Developers, Employee Manager, Height, Hide Button, Hospital Patients, Index Performance, Menu Items, Merge Stock Index, Movies, Movies Live, Projects, Rectangles, Restaurant Menu, Retirees, Sales, SMS Messages, Student Activities, Tasks, Transactions, Youngest Child, Log Parser, Paragraph, Post Comment, Product Rating, Products, Row Appender, Scale Font Size, Snapshot, Username, Vectors, Welfare Organization, Manager Sales, Delete Orders, Validation, Timer, Screen, Student Max Score, Average Salary, Movie Genres, Student Rankings, Auto Show, Poll
JavaScript Arrays Closures Exceptions DOM manipulation Event handling Language SQL Conditions Views Strings Monkey patching HTML5 Subqueries Update Recursion Node.js Asynchronous programming Modules Events Arithmetic Iteration Attribute manipulation Constraints Create table Database schema Select Create index Performance tuning Alter table Aggregation Dialog box Ordering Regex Insert Left join Bug fixing Objects Asynchronous calls Indexes Union Group by Joins Serialization XML Content manipulation JSON Sorting Styling SQL CASE CTE Delete Forms Callback Classes ECMAScript 2015
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