HTML/CSS, JavaScript, C#, and SQL Online Test

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

It's an ideal test for pre-employment screening. A good full stack developer C# needs to be able to use 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, C#, 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.



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



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

Alert Service


C# Interfaces Inversion of control Refactoring Public

Refactor the AlertService and AlertDAO classes:

  • Create a new interface, named IAlertDAO, that contains the same methods as AlertDAO.
  • AlertDAO should implement the IAlertDAO interface.
  • AlertService should have a constructor that accepts IAlertDAO.
  • The RaiseAlert and GetAlertTime methods should use the object passed through the constructor.
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Premium Questions for HTML/CSS, JavaScript, C#, 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, Needle, Driver Exam, Positive Numbers, Links, Function Wrapper, Double, Read First Line, Truthy Expressions, Roads, Word Count, Document Store, New Folder, Paper Strip, Max Sum, Log Patch, Log Patch, Shipping, Chinese Box, Loading Bar, Ingredients, Unloading Trucks, Read Write Execute, Procedural Generator, Runner, Segment, Segment, Hobbies, A Tag, Ad, Addition, Article Style, ATM Locations, Authors, Autocomplete, Baby Names, Ban Users, Bank Branches, Bicycle, Bookmark, Chain Link, Cheapest Product, Christmas Tree, Cities, Classroom, Confirm, Countries, Crop Ratio, Date Transform, Date Transform, Developers, Disposable Wrapper, Document Counter, Editor, Employee Manager, Veterinarian, Eye of the Storm, Format Table, Height, Hide Button, Hobbies, 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, Internal Nodes, Keywords, Label Color, Link, Loading, Log Parser, Log Parser, Logo, Node, Paragraph, Paragraph, Platformer, Product Rating, Product Refactoring, Products, Racer, Remove Repetitions, Row Appender, Scale Font Size, Share Button, Shirts, Snapshot, Snapshot, Sort Params, Stack to List, Timesheet, Ship, Unique Product, Unique Numbers, Upload, Username, Username, Vectors, Vectors, Warehouse, Weighted Average, Widgets, Window Manager, Language Teacher, Delete Orders, Timer, Book Sale, Friend, Screen, Email Tables, Average Salary, Movie Genres, Auto Show, Poll, Shelf Test, Breakfast Menu, Array Search, Department Report, iframe, Post Comment, Cards, Reorder, Validation, Table of Names, Blog, Stories, Hen, Prefix, Student Rankings, Welfare Organization, Student Max Score, Adder, XML Navigation, Data Entry, Flight Connections, Trading Data Paging, Moving Total, Agents, River Discharge, Users and Accounts, Matching Clothes, Screen Reader, Shining Star, Ice Cream Flavors, TestDome Logo, Manager Sales, Memory Game, Kilometer Converter
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 C# Stream Strings Exceptions Closures HTML/CSS CSS selectors Styling DOM manipulation Event handling Language SQL Conditions Views Bug fixing Algorithmic thinking Monkey patching Extension methods Arithmetic Data structures HTML5 Subqueries Update Sorting Random Memory management Iteration Attribute manipulation Element spacing CSS advanced Element size Constraints Create table Database schema Select Create index Performance tuning Flexbox Positioning Alter table Field modifiers Bookmarks Elements and attributes Linked list Aggregation Fonts Accessibility levels Properties Dialog box Ordering Integer division Regex Destructors OOP Refactoring Left join Queue Objects Asynchronous calls Dictionary Lists Indexes Union Group by Insert Joins Tree Hyperlink Animation Serialization XML Recursion JSON Multithreading Synchronization StringBuilder Content manipulation Forms Pass by reference Complexity Stack Tables Inheritance Delete Callback Graphs Classes ECMAScript 2015 Borders Inline styles SQL CASE Test case design Unit testing Selectors IFrame Semantic tags Dynamic programming Higher order function Interfaces LINQ Dynamic Objects Pagination HashSet Right join Database normalization Accessibility TDD Responsive design CSS layout CTE Method overriding
Recommended Job Roles

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

.NET Developer
C# Developer
Full-Stack Developer
JavaScript Developer
SQL Developer
Web Developer

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