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

Ensure

3min
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Easy  
  -  
CODE

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.

Students

3min
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Easy  
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CODE

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
   id INTEGER PRIMARY KEY,
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL

Avatar

7min
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Easy  
  -  
CODE

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

Binary Search Tree

15min
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Easy  
  -  
CODE

C# Algorithmic thinking Data structures Public

A three-node binary tree.Binary search tree (BST) is a binary tree where the value of each node is larger or equal to the values in all the nodes in that node's left subtree and is smaller than the values in all the nodes in that node's right subtree.

Write a function that, efficiently with respect to time used, checks if a given binary search tree contains a given value.

For example, for the following tree:

  • n1 (Value: 1, Left: null, Right: null)
  • n2 (Value: 2, Left: n1, Right: n3)
  • n3 (Value: 3, Left: null, Right: null)

Call to Contains(n2, 3) should return true since a tree with root at n2 contains number 3.

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Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

Questions
Prefix, Link, Bicycle, Editor, Classroom, Filter, Stopwatch, Movies, Disposable Wrapper, Index Performance, Poll, Rectangles, Blog, Needle, Log Parser, Label Color, Driver Exam, Positive Numbers, Logo, Vectors, Crop Ratio, Article Style, Retirees, Chicken, Share Button, Ad, Racer, Authors, Countries, Employee Manager, Merge Stock Index, Paragraph, Paragraph, Post Comment, Row Appender, Username, Keywords, Chain Link, Hobbies, Hobbies, Sort Params, Node, Cheapest Product, Links, Programmer Teacher, Vectors, Username, Function Wrapper, Confirm, Movies Live, Double, Hide Button, Read First Line, Truthy Expressions, Addition, ATM Locations, Bookmark, Christmas Tree, Department Report, Developers, iframe, Delete Orders, Product Rating, Product Refactoring, Products, Restaurant Menu, Roads, Sales, Shirts, Snapshot, Snapshot, Student Activities, Table of Names, Transactions, Warehouse, Word Count, Projects, Date Transform, Baby Names, Loading, Log Parser, Date Transform, Cards, Document Store, Youngest Child, Format Table, Document Counter, Breakfast Menu, Cities, Screen Reader, Scale Font Size, New Folder, Internal Nodes, Window Manager, Moving Total, Entry, Unique Numbers, Paper Strip, Max Sum, Friend, Remove Repetitions, Unique Name, Log Patch, Log Patch, Train, Platformer, Shipping, Timesheet, Segment, Chinese Box, Tasks, Loading Bar, Weighted Average, Ingredients, Autocomplete, Bank Branches, Hospital Patients, Menu Items, Ban Users, Shining Star, Unloading Trucks, Array Search, Validation, Stack to List, Height, Read Write Execute, Eye of the Storm, SMS Messages, Segment, Procedural Generator, Data Entry, Email Tables, Student Max Score, TestDome Logo, Ice Cream Flavors, A Tag, Widgets, Upload, Reorder, Runner, Adder, Shelf Test, Stories, Rare, Screen
Skills
C# LINQ HTML/CSS HTML attributes Language JavaScript Arrays Closures SQL Aggregation Subqueries Memory management OOP Indexes Conditions HTML5 Semantic tags Stream Strings Serialization CSS selectors Exceptions Arithmetic Searching Bug fixing Insertion Positioning Styling Multithreading Joins Union DOM manipulation Event handling Data structures Iteration CSS advanced Constraints Database schema Delete Refactoring Sorting Update Views Animation Selectors Accessibility Algorithmic thinking Graphs Monkey patching Extension methods Tables Performance tuning TDD Recursion Random CSS layout Forms CSS basics HTML Test case design Dynamic programming Classes ECMAScript 2015
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