C# and .NET Online Test

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About the test

The C# and .NET online test assesses knowledge of the .NET framework and its class library. This test includes live coding tasks in the C# programming language as it is the most used language for .NET.

The assessment includes work-sample tasks such as:

  • Working with classes, objects, and interfaces to write reusable code.
  • Implementing and properly using algorithms and data structures to optimize application performance.
  • Using the Async-Await pattern to work with asynchronous code.

A good .NET developer needs a solid understanding of the C# programming language and the .NET framework class library in order to write robust and maintainable code.

Sample public questions

Easy
15 min
code
Public
AI-resistant
C#
Arithmetic
Arrays
Iteration

A gaming company is working on a platformer game. They need a method that will compute the character's final speed, given a map and a starting speed.

The terrain on which the game character moves forward is made from various pieces of land placed together. Implement the method CalculateFinalSpeed which takes the initial speed of the character, and an array of degrees of inclination that represent the uneven terrain.

The speed of the character will increase or decrease proportionally to the incline of the land, as shown in the image below:

Image showing the increase and decrease of character speed.

The magnitude of the angle of inclination will always be < 90°. The speed change occurs only once for each piece of land. The method should immediately return 0 as the final speed if an incline reduces the speed to 0 or below 0, which makes the character lose 1 life.

For example, the below code:

Console.WriteLine(CalculateFinalSpeed(60, new int[] { 0, 30, 0, -45, 0 }));

should print:

75
Easy
5 min
mca
Public
AI-resistant
.NET
LINQ

Consider the following code:

C#

public class RecyclingBin
{
    protected List<string> recyclables = new List<string>();
    
    public void Add(string recyclable)
    {
        if (recyclable.Split(' ').Length > 1 && recyclable.Split(' ')[1].Length > 3)
        {
            recyclables.Add(recyclable);
        }
    }
    
    public List<IGrouping<string, string>> SortRecyclables()
    {
        return recyclables.GroupBy(recyclable => recyclable.Split(' ').First()).ToList();
    }
}

VB.NET

Public Class RecyclingBin
    Protected recyclables As List(Of String) = New List(Of String)
    
    Public Sub Add(recyclable As String)
        If recyclable.Split(" ").Length > 1 And recyclable.Split(" ")[1].Length > 3
            recyclables.Add(recyclable)
        End If
    End Sub

    Public Function SortRecyclables()
        Return recyclables.GroupBy(Function(recyclable) recyclable.Split(" ").First()).ToList()
    End Function
End Class

Select the statements that are true if a new RecyclingBin is instantiated and the Add method is called with the following recyclable parameters: "metal pipe", "plastic toy", "metal bar", "copper wire", "plastic button", "wire", and "brass".

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82 more premium C# and .NET questions

Enum, NET Versions, Max Sum, Product Refactoring, Sum of Numbers, Delayed Print, Third Party Components, String Operations, Racer, Read First Line, Prefix, Chinese Box, Car Rental, Eye of the Storm, Document Store, Snapshot, Moving Total, Driver Exam, Classroom, Username, Weighted Average, Kilometer Converter, Document Counter, Disposable Wrapper, Platformer, String Occurrence, Hobbies, Language Teacher, Read Write Execute, Friend, Internal Nodes, Crop Ratio, Unique Numbers, Wheel Defects, Log Parser, Shelf Test, Chain Link, Worker, Veterinarian, Window Manager, Ceramic Store, Stories, Paper Strip, Segment, Flight Connections, Nullable Employee, Vectors, Date Transform, Book Sale, Blog Posts, XML Navigation, Memory Leak, Gearbox, Company Stock, Airport Networks, Patient Class, Unique Product, Ingredient Tuple, Stack to List, Log Patch, Fire Dragon, Shining Star, Bicycle, Flimsy Ladder, Paragraph, Animal Hierarchy, Procedural Generator, String, Order Chars, Integer to Object, Citizen Income, Sort Params, Parking Allocation, Popular Book, Node, Planet Search, Shipping, Digital Flasks, Calories Burned, Circuit Simulator, Chemical Machine, Construction Game.

Skills and topics tested

  • .NET
  • Enum
  • CLR
  • C#
  • Algorithmic Thinking
  • Accessibility Levels
  • OOP
  • Refactoring
  • LINQ
  • Async-Await
  • Multithreading
  • Package Manager
  • StringBuilder
  • Synchronization
  • Exceptions
  • Data Structures
  • Sorting
  • Bug Fixing
  • Language
  • Lists
  • HashSet
  • Properties
  • Regex
  • Strings
  • Arithmetic
  • Inheritance
  • Method Overriding
  • Destructors
  • Memory Management
  • Linked List
  • Stream
  • Dictionary
  • Iteration
  • Graphs
  • Arrays
  • Tree
  • Integer Division
  • Serialization
  • XML
  • Test Case Design
  • Unit Testing
  • Queue
  • Dynamic Programming
  • Null Coalescing Operator
  • Null Conditional Operator
  • Eager Loading
  • Entity Framework
  • Lazy Loading
  • Dynamic Objects
  • AI Code Review
  • Conditional Statements
  • Loops
  • 2D Array
  • Abstract Class
  • Tuples
  • Complexity
  • Stack
  • Extension Methods
  • Higher Order Function
  • Interfaces
  • TDD
  • Field Modifiers
  • Random
  • Class Library
  • Boxing and Unboxing
  • Pass by Reference
  • Recursion
  • Conditions

For job roles

  • .NET Developer
  • Back-End Developer
  • C# Developer
  • Web Developer

Sample candidate report

What others say

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Simple, straight-forward technical testing

TestDome is simple, provides a reasonable (though not extensive) battery of tests to choose from, and doesn't take the candidate an inordinate amount of time. It also simulates working pressure with the time limits.

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Product reviews

G2 - Crowd Badge
G2 - High Performer (2022)
Capterra - 4.5 Stars
Capterra - Shortlist (2023)

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