The HTML/CSS, JavaScript, Ruby, and SQL online test assesses candidates' knowledge across the whole Web stack from HTML, CSS, and JavaScript on the Web front-end over Ruby on the back-end to SQL for data access.

It's an ideal test for pre-employment screening. A good Ruby full stack developer needs to be familiar in a wide range of technologies.

This online test requires candidates to solve coding problems and find and fix bugs in multiple technologies.

Recommended Job Roles
Full-Stack Developer
JavaScript Developer
Ruby Developer
SQL Developer
Web Developer
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Sample Free Questions



JavaScript 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 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



HTML/CSS CSS selectors Styling Public

Every user on your website has an image avatar that is displayed when they post a comment. You want to style these images differently from other images on your site. Add a CSS class named avatar that fulfils the following requirements:

  1. The avatar's border is rounded, so that it appears as a circle.
  2. The avatar's width and height are both 150px.
  3. The avatar has a solid border, has a width of 2px, and be colored gray.

For example, the avatar in the template should look like:

Cat avatar

Merge Names


Ruby Arrays Public

Implement the unique_names method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. The returned array should have no duplicates.

For example, calling unique_names(["Ava", "Emma", "Olivia"], ["Olivia", "Sophia", "Emma"]) should return an array containing Ava, Emma, Olivia, and Sophia in any order.

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Link, Editor, Filter, Stopwatch, Movies, Index Performance, Poll, Rectangles, Blog, Document Store, Category Tree, Label Color, Positive Numbers, Logo, Crop Ratio, Article Style, Programmer Teacher, Greeter, Retirees, Share Button, Ad, Authors, Countries, Employee Manager, Paragraph, Row Appender, Keywords, Chain Link, Hobbies, Cheapest Product, Links, Vectors, Username, Function Wrapper, Confirm, Movies Live, Double, Hide Button, Truthy Expressions, Addition, ATM Locations, Bookmark, Christmas Tree, Developers, iframe, Delete Orders, Product Rating, Products, Restaurant Menu, Roads, Sales, Shirts, Snapshot, Student Activities, Table of Names, Transactions, Warehouse, Word Count, Projects, Baby Names, Loading, Log Parser, Cards, Youngest Child, Format Table, Read First Line, Needle, Products, Numbers to Text, Paragraph, Username, Hobbies, Ranges, Breakfast Menu, Cities, Screen Reader, Scale Font Size, New Folder, Log Patch, Log Patch, Shipping, Timesheet, Tasks, Loading Bar, Ingredients, Autocomplete, Bank Branches, Hospital Patients, Menu Items, Ban Users, Array Search, Validation, Height, Read Write Execute, SMS Messages, Data Entry, Email Tables, Student Max Score, TestDome Logo, Ice Cream Flavors, A Tag, Widgets, Upload, Reorder, Screen, Department Report, Post Comment, Merge Stock Index, Date Transform, Date Transform, Segment, Segment
HTML/CSS HTML attributes JavaScript Arrays Closures SQL Aggregation Subqueries Indexes Conditions HTML5 Semantic tags Ruby Bug fixing Language Data structures CSS selectors OOP Insertion Positioning Styling Joins Strings DOM manipulation Iteration Arithmetic Searching Exceptions Event handling CSS advanced Constraints Database schema Delete Serialization Sorting Update Views Animation Stream Ranges Selectors Accessibility Monkey patching Tables Performance tuning Recursion CSS layout Forms CSS basics HTML Classes ECMAScript 2015 Union
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