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

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The HTML/CSS, JavaScript, C# Algorithms, and SQL online test assesses candidates' knowledge across the whole Web stack. HTML, CSS, and JavaScript on the Web front-end, algorithmic-thinking skills in C#, and SQL on the back-end for data access.

It's an ideal test for pre-employment screening. A good full stack C# developer needs to be able to use a wide range of technologies, including solving back-end problems of a significant computational complexity.

This online test requires candidates to solve coding problems, find and fix bugs in multiple technologies, and analyze or design an algorithm using C# as the programming language.

Recommended Job Roles
.NET Developer
C# Developer
Full-Stack Developer
JavaScript Developer
SQL Developer
Web Developer
Sample Candidate Report

Sample Free Questions



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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Filter, Positive Numbers, Links, Function Wrapper, Double, Truthy Expressions, Roads, Table of Names, Word Count, Cards, New Folder, Paper Strip, Max Sum, Log Patch, Chinese Box, Loading Bar, Ingredients, Unloading Trucks, Array Search, Reorder, Segment, Hobbies, A Tag, Ad, Addition, Article Style, ATM Locations, Authors, Autocomplete, Baby Names, Ban Users, Bank Branches, Blog, Bookmark, Cheapest Product, Christmas Tree, Cities, Confirm, Countries, Date Transform, Department Report, Developers, Editor, Employee Manager, Veterinarian, Format Table, Height, Hide Button, 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, iframe, Internal Nodes, Keywords, Label Color, Link, Loading, Log Parser, Logo, Paragraph, Platformer, Post Comment, Product Rating, Products, Remove Repetitions, Row Appender, Scale Font Size, Screen Reader, Share Button, Shirts, Snapshot, TestDome Logo, Timesheet, Unique Product, Unique Numbers, Upload, Username, Vectors, Warehouse, Widgets, Window Manager, Welfare Organization, Manager Sales, Delete Orders, Validation, Timer, Book Sale, Friend, Screen, Data Entry, Email Tables, Student Max Score, Average Salary, Movie Genres, Student Rankings, Auto Show, Ice Cream Flavors, Poll, Moving Total, Breakfast Menu
JavaScript Arrays Closures HTML/CSS CSS selectors Styling Exceptions DOM manipulation Event handling Language SQL Conditions Views Strings C# Algorithmic thinking Monkey patching Data structures HTML5 Subqueries Update Sorting Recursion Arithmetic Iteration Attribute manipulation Element spacing CSS advanced Element size Constraints Create table Database schema Select Create index Performance tuning Flexbox Positioning Alter table Elements and attributes Semantic tags Bookmarks Aggregation Fonts Dialog box Ordering Regex Insert Left join Bug fixing Queue Objects Asynchronous calls Indexes Union Group by Joins Hyperlink IFrame Tree Animation Serialization XML Linked list Content manipulation JSON StringBuilder Accessibility Forms CSS layout Tables Dictionary SQL CASE CTE Delete Callback Graphs Classes ECMAScript 2015 Borders Inline styles Responsive design HashSet Selectors
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