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 and find and fix bugs in multiple technologies.

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, Word Count, New Folder, Log Patch, Loading Bar, Ingredients, Fahrenheit Converter, Shopping Cart, Segment, Hobbies, A Tag, ATM Locations, Authors, Autocomplete, Ban Users, Bank Branches, Cheapest Product, Confirm, Countries, Date Transform, 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, Product Rating, Products, Row Appender, Scale Font Size, Snapshot, Username, Vectors, Manager Sales, Delete Orders, Timer, Screen, Average Salary, Movie Genres, Auto Show, Poll, Array Search, Department Report, File Exists, Stream Transform, Run Sequentially, Retry Request, Weather Data, Post Comment, Cards, Reorder, Validation, Table of Names, Student Rankings, Welfare Organization, Student Max Score
JavaScript Arrays Closures Exceptions DOM manipulation Event handling Language SQL Conditions Views Strings Monkey patching HTML5 Subqueries Update Node.js Modules Events Arithmetic Iteration Attribute manipulation Constraints Create table Database schema Select Create index Performance tuning Alter table Aggregation Dialog box Ordering Regex Bug fixing Left join Objects Asynchronous calls Indexes Union Group by Insert Joins Serialization XML JSON Sorting Content manipulation Styling CTE Delete Callback Classes ECMAScript 2015 SQL CASE Recursion Stream Async-await Asynchronous programming Promise Forms
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