HTML/CSS, JavaScript, Ruby, and SQL Online Test

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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.

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Free Sample Questions for HTML/CSS, JavaScript, Ruby, 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.



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



HTML/CSS Borders Element Size 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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Premium Questions for HTML/CSS, JavaScript, Ruby, 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.

Filter, Document Store, Positive Numbers, Greeter, Links, Double, Truthy Expressions, Roads, Read First Line, Ranges, New Folder, Log Patch, Log Patch, Shipping, Loading Bar, Read Write Execute, Segment, Segment, Hobbies, Numbers to Text, A Tag, Ad, Article Style, ATM Locations, Authors, Autocomplete, Baby Names, Ban Users, Bank Branches, Category Tree, Chain Link, Cheapest Product, Christmas Tree, Cities, Countries, Developers, Editor, Employee Manager, Format Table, Hide Button, Hobbies, Hospital Patients, Index Performance, Menu Items, Merge Stock Index, Movies, Movies Live, Projects, Rectangles, Restaurant Menu, Retirees, Sales, SMS Messages, Tasks, Youngest Child, Keywords, Label Color, Loading, Logo, Paragraph, Paragraph, Products, Products, Row Appender, Scale Font Size, Shirts, Snapshot, Timesheet, Upload, Username, Username, Vectors, Warehouse, Widgets, Language Teacher, Delete Orders, Timer, Screen, Email Tables, Average Salary, Auto Show, Poll, Array Search, Department Report, iframe, Post Comment, Cards, Validation, Table of Names, Student Rankings, Student Max Score, Data Entry, Max Sum, Reorder, Ingredients, Crop Ratio, Launch Time, Product Rating, Function Wrapper, Link, Users and Accounts, Matching Clothes, Agents, River Discharge, Log Parser, Height, Unique Numbers, Manager Sales, Load URL, Photon Frequency, String Occurrence, Price List, Ice Cream Flavors, Addition, Movie Genres, Student Activities, Welfare Organization, Date Transform, Date Transform, Transactions, Trading Data Paging, Unique Product, Color Codes, Memory Game, Tax Calculator, Special Actions, Bookmark, TestDome Logo, Screen Reader, Share Button, Game Offer, Bicycle Report, Curious Leaf, Gaming Console, Travel Blog, Confirm, Blog
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 Arrays Ruby Bug Fixing Language Closures HTML/CSS CSS Selectors Styling DOM Manipulation Event Handling SQL Conditions Views Exceptions Ranges Strings Monkey Patching Arithmetic HTML5 Iteration Attribute Manipulation Element Spacing Constraints Create Table Database Schema Select Create Index Performance Tuning Flexbox Positioning Alter Table Hash Linked List Aggregation Subqueries Fonts Ordering Elements and Attributes Left Join Asynchronous Calls Indexes Union Group by Update Insert Joins Animation Regex JSON Serialization Sorting Content Manipulation Forms Objects Tables Inheritance OOP Delete Callback Classes ECMAScript 2015 Borders Inline Styles SQL CASE Recursion Hyperlink IFrame Algorithmic Thinking Integer Division Timing Events Right Join Database Normalization XML Dictionary CTE Ajax HTTP Promise Stream Selectors Responsive Design CSS Advanced Element Size Pagination Associative Arrays Bookmarks CSS Layout Accessibility CSS Basics UI Dialog Box Semantic Tags
Recommended Job Roles

These are the job roles that we recommend for the HTML/CSS, JavaScript, Ruby, and SQL online test.

Full-Stack Developer
JavaScript Developer
Ruby Developer
SQL Developer
Web Developer

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