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About the test

The JavaScript Algorithms and Node.js online test assesses candidates' algorithmic thinking skills in the JavaScript language, and knowledge of specific Node.js features.

It's an ideal test for pre-employment screening. A good Node.js developer needs to be able to solve problems using Node.js, and also use JavaScript to design and implement algorithms that are both correct and efficient.

This online test requires candidates to solve coding problems in JavaScript and Node.js.

Sample public questions

New

A playlist is considered a repeating playlist if any of the songs contain a reference to a previous song in the playlist. Otherwise, the playlist will end with the last song which points to undefined.

Implement the method isRepeatingPlaylist that, efficiently with respect to time used, returns true if a playlist is repeating or false if it is not.

For example, the following code prints "true" as both songs point to each other.

let first = new Song("Hello");
let second = new Song("Eye of the tiger");

first.nextSong = second;
second.nextSong = first;

console.log(first.isRepeatingPlaylist());
JavaScript
Algorithmic Thinking
Linked List
Set
Easy
15 min
code
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.

Node.js
NPM
Easy
3 min
mca
Public

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Skills and topics tested

  • Node.js
  • Modules
  • Events
  • Asynchronous Programming
  • Async-Await
  • Promise
  • JavaScript
  • Algorithmic Thinking
  • JSON
  • Stream
  • NPM
  • Event Loop
  • Bug Fixing
  • Event Emitter
  • Exceptions
  • Dictionary
  • Graphs

For job roles

  • Back-End Developer
  • JavaScript Developer
  • Node.js Developer

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