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JavaScript Algorithms, Node.js, and SQL Online Test

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The JavaScript Algorithms, Node.js, and SQL online test assess candidates' algorithmic thinking skills in the JavaScript language, knowledge of 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 to solve problems using Node.js, and also use JavaScript to design and implement algorithms that are both correct and efficient, and to write and analyze SQL queries to access a database.

This online test requires candidates to solve coding problems in JavaScript and Node.js, and write SQL queries that extract, combine, and manipulate data.

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Free Sample Questions for JavaScript Algorithms, Node.js, and SQL Test

Our sample questions are free for companies to use on a trial plan. See more about our premium questions for paid plans below.

Ensure

3min
  -  
Easy  
  -  
CODE

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.

Remove Property

7min
  -  
Easy  
  -  
CODE

JavaScript Language Objects Public

Implement the removeProperty function which takes an object and property name, and does the following:

If the object obj has a property prop, the function removes the property from the object and returns true; in all other cases it returns false.

Song

15min
  -  
Easy 
  -  
CODE

JavaScript Algorithmic thinking Linked list Set Public 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());
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Premium Questions for JavaScript Algorithms, Node.js, and SQL Test

TestDome offers a premium questions library with 1000+ unique, hand-crafted questions whose answers can’t be found online. If you spot an answer somewhere online, we’ll give you a refund.

Question Names

These premium questions are included in this pre-built test and can be added to any multi-skill test. Please sign up for a paid plan to view the questions in detail.

Unique Numbers, Max Sum, Unique Product
Covered Skills

Testing of these skills is covered in this pre-built test because they’re closely related. On our paid plan, you can easily create your own custom multi-skill tests.

JavaScript Algorithmic thinking Dictionary
Recommended Job Roles

These are the job roles that we recommend for the JavaScript Algorithms, Node.js, and SQL online test.

SQL Developer

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