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C# interview questions and online tests

The expert team at DevSkiller prepares C# interview questions and online tests aimed at hiring junior, middle, and senior-level C# developers.

DevSkiller C# interview questions and online tests are powered by RealLifeTesting™. The RealLifeTesting™ methodology is unique in that it tests candidates’ skills through real-world challenges rather than algorithmic problems. Recruiting your next C# developer can become a whole lot easier with DevSkiller C# interview questions and online tests.

See similar coding tests:
.NET and C# online tests

Tecnologie coperte:

Linguaggio di programmazione: C#

C# frameworks and libraries: .NET, ASP.NET, MVC, Entity Framework, WCF, LINQ and others

Strumenti di costruzione: MSBuild

nunit
MEDIO
Competenze testate
Durata
85 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, .NET Core, ML.NET, QA, Testing, xUnit, NUnit

Lacune nel codice

valutare la conoscenza di NUnit, QA

Attività di programmazione - Livello: Medio

QA | .NET | NUnit | Tests for Document Management System API - Implement an NUnit test that checks business requirements for a Documents API for a Document Management System

Selenio
MEDIO
Competenze testate
Durata
48 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di QA, Selenio, .NET, C#

Lacune nel codice

valutare la conoscenza di Java, QA, Selenio

Attività di programmazione - Livello: Medio

QA | .NET, Selenium | Data extraction - Implement methods in class SeleniumTask.SeleniumExecutor to pass successfully all tests.

.NET
MEDIO
Competenze testate
Durata
73 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, WCF, WCF features, Web applications & Web Services, Windows Communication Foundation, BasicHttpBinding, NetNamedPipeBinding

Lacune nel codice

valutare la conoscenza di .NET, Basic Common topics, C# basics, C#

Attività di programmazione - Livello: Medio

.NET | WCF Currency Exchange service - Implement the rest of the methods for the Currency Exchange Rates WCF Service.

.NET
JUNIOR
Competenze testate
Durata
81 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Lacune nel codice

valutare la conoscenza di .NET Core, .NET Internals, dotnet build, Advanced debugging, Captures a dump, dotnet-dump, Diagnostic trace, dotnet-trace

Attività di programmazione - Livello: Facile

.NET | .NET Core | Bookstore Inventory - Implement a couple of methods in .Net Core to manage bookstore inventory.

.NET
JUNIOR
Competenze testate
Durata
51 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#, .NET Core, Basic Common topics, Logging

Lacune nel codice

valutare la conoscenza di .NET Core, .NET Internals, dotnet build, Basic Common topics, C#, Logging, Logging Extensions in .NET Core, dotnet restore

Attività di programmazione - Livello: Facile

.NET | .NET Core | Comments Challenge - Implement an Index action for posts controller so that posts can be rendered appropriately into the Posts/Index view in .Net Core.

.NET
MEDIO
Competenze testate
Durata
43 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Lacune nel codice

valutare la conoscenza di .NET, Basic Common topics, C# basics, Advanced memory management, Object - disposing, Advanced debugging, dotnet-trace tool

Attività di programmazione - Livello: Medio

.NET | Anonymizer - Implement couple of anonymization methods, probably using regular expressions.

.NET
SENIOR
Competenze testate
Durata
49 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#, Message Patterns, WCF, Web applications & Web Services, Windows Communication Foundation, Metadata

Lacune nel codice

valutare la conoscenza di HTML, HTML5, CSS

Attività di programmazione - Livello: Difficile

.NET | RSA Decryption WCF Service - Finish implementation of the WCF interface which can decrypt and verify data encrypted using RSA.

.NET
MEDIO
Competenze testate
Durata
44 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, Desktop & Mobile applications, Windows Presentation Foundation

Lacune nel codice

valutare la conoscenza di .NET, C#, Desktop & Mobile applications, Windows Presentation Foundation

Attività di programmazione - Livello: Medio

.NET | WPF | User Data Registration WPF Module - Finish the implementation meeting requirements such as set proper layouts, styles, and binding for specified components.

.NET
JUNIOR
Competenze testate
Durata
52 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#, .NET Core, Basic Common topics, Logging

Lacune nel codice

valutare la conoscenza di .NET, C#, .NET Core, .NET Internals, dotnet restore

Attività di programmazione - Livello: Facile

.NET | .NET Core | Banking System Configuration Module - Complete the implementation of one of the banking system modules used to handle the configuration parameters.

This task verifies knowledge of C# classes, interfaces, and inheritance.

.NET
JUNIOR
Competenze testate
Durata
53 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#, .NET Core, Basic Common topics, Logging

Lacune nel codice

valutare la conoscenza di .NET, Basic Common topics, C# basics, .NET Core, .NET Internals, dotnet build

Attività di programmazione - Livello: Facile

.NET | .NET Core, C# | Bank interface for Internet Banking System - Implement a CreateTransfer method which sould check and save the proper data, and a SearchTransfer method which should filter and return the proper information.

Selenio
SENIOR
Competenze testate
Durata
81 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di QA, .NET, C#, Selenio

Lacune nel codice

valutare la conoscenza di QA .NET, C#, Selenio

Attività di programmazione - Livello: Difficile

QA | .NET | Selenium, C#, JavaScript | Home Page Testing - Implementare soluzioni basate sulla conoscenza del test dei cookie e dei metodi JavaScript di Selenium utilizzando C# e controllando le schede del browser da Selenium.

QA
JUNIOR
Competenze testate
Durata
53 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di QA, .NET, C# e Selenio

Lacune nel codice

valutare la conoscenza di QA, .NET, C# e Selenio

Attività di programmazione - Livello: Facile

QA | .NET, Selenium | Firefox Driver | Test Selenium per la pagina di login - Implementare i test Selenium per la pagina di login: controllare i componenti HTML, gli stili CSS, impostare il valore dei campi di input e cliccare sul pulsante della pagina.

Selenio
JUNIOR
Competenze testate
Durata
33 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Lacune nel codice

valutare la conoscenza di NUnit, QA

Attività di programmazione - Livello: Facile

QA | Selenium, C# | Retrieve data from elements - Implement the methods that retrieve text from an element or an attribute's value.

.NET
JUNIOR
Competenze testate
Durata
73 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, .NET Core, Basic Common topics, C#, Logging, Parallel Programming, Visual Basic .NET

Attività di programmazione - Livello: Facile

.NET | .NET Core, Microservices | Traffic volume report api - Complete the implementation of a reports' microservice that should subscribe data registered by specialized microservices. The data must be saved in the local database. In the future the data will be used to generate reports for clients.

.NET
SENIOR
Competenze testate
Durata
106 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Lacune nel codice

valutare la conoscenza di ASP.NET, C#, Security basics, .NET Core, Basic Common topics, Entity Framework Core, Logging

Attività di programmazione - Livello: Difficile

.NET | .NET Core | Company Web Page - Complete the implementation of a web page.

The page can be displayed in English or Spanish depending on the user's culture.

A user should have knowledge about the localized data annotation, the localized resources ant the action filters.

C#
MEDIO
Competenze testate
Durata
160 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Medio

.NET | MT101 Swift message parser and validator - Implement a parser and a validator for data that contains Swift MT101 messages.

.NET
MEDIO
Competenze testate
Durata
156 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, Advanced memory management .NET, C#, Fundamentals of memory, Heap and stack, Memory allocation, .NET Core, Basic Common topics, Logging

Attività di programmazione - Livello: Medio

.NET | .NET Core | MT101 Swift message parser and validator - Implement a parser and a validator for data that contains Swift MT101 messages.

.NET
SENIOR
Competenze testate
Durata
180 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Attività di programmazione - Livello: Difficile

.NET | Tools for custom map with POI - Implement the tools for POIs search (on the map) and calculate an optimal tour route from user's favorite points. Additionaly, finish the implementation of a self-hosted WCF service which should provide this functionality.

.NET
MEDIO
Competenze testate
Durata
89 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Medio

.Net | .Net Core | Anonymizer - Implement a couple of anonymization methods, probably using regular expressions.

C#
SENIOR
Competenze testate
Durata
75 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Difficile

.NET | C# | Threads | Bank gateway for booking transactions in Central Accounting System - Implement the IBookingGateway interface (create own class in a separate file in theBookingGatewayService project and implement it) and finish implementation of the BookingGatewayFactory class, which should create objects of IBookingGateway.

.NET
JUNIOR
Competenze testate
Durata
36 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Facile

.Net | Weather Forecast App - Finish implementation of the Observer design pattern in the Weather forecast application.

.NET
MEDIO
Competenze testate
Durata
115 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Medio

.Net | .Net Core | Movie Repository - Implement missing repository methods for movies asp.net app. Task requires knowledge of sqlserver query language and usage of direct connection to database without ORM.

C#
SENIOR
Competenze testate
Durata
309 minuti al massimo.
Valutazione
Automatico
Panoramica del test

Domande a scelta

valutare la conoscenza di .NET, C#

Attività di programmazione - Livello: Difficile

.Net | .Net Core | Back end Alone - Implement .NET Core MVC Model Binder and a simple graph algorithm to support request with a fancy format. This task consists of two objectives. First is to implement model binder that will properly parse incoming request into objective structure. Second objective is to sort this structure (graph) before further processing.

Recommended roles for our C# interview questions and online tests

  • C# Developer
  • Web Developer
  • Junior C# Developer
  • Senior C# Developer
  • C# Programmer
  • .NET Developer Back-End Developer
  • C# .NET Developer
  • C# Web Developer
  • Full Stack .NET Developer
  • .NET Software Developer
  • .NET Programmer
  • ASP.NET Developer

How our C# interview questions work

DevSkiller C# interview questions and online tests implement the RealLifeTesting™ methodology to challenge candidates to answer questions and solve problems, similar to those they have to deal with in the real world. The old days of developers reciting coding patterns were not efficient enough at deciphering who were the most qualified developers, RealLifeTesting™is the solution.

Within the initial screening stages of recruitment, recruiters can distinguish the exact strengths of a candidate. They can assess coding skills, critical thinking and how candidates handle time-management.

DevSkiller C# interview questions and online tests can provide your business with objective insight into exactly how well each of developer candidates will perform in the role.

Caratteristiche principali

  • Gain in-depth insight into candidates’ coding ability
  • Online tests accessible from anywhere in the world
  • Implementing RealLifeTesting™ offering candidates a greater user experience: use of their own IDE and clone to GIT, run unit tests, and access Stack Overflow/Github/Google for research.
  • Robust tools to prevent plagiarism and ensure test accuracy
  • Observe candidates’ undertaking of tests in real time
  • Save time with non-technical automated results
  • A C# coding test can assess any level of experience

Skills covered in our C# interview questions and online tests

  • C#
  • .NET
  • JSON
  • NUnit
  • QA
  • Selenio
  • Testing
  • .NET 5
  • .NET Core
  • Basic Common topics
  • Entity Framework
  • Logging
  • Microservices
  • Parallel Programming
  • RESTful Web Service
  • Visual Basic .NET
  • Action filters
  • Entity Framework Core
  • HTTP Headers
  • Localized data annotation
  • Localized resources
  • Logging
  • Security basics
  • User Culture
  • Web Page configuration
  • Interfaces
  • Espressioni regolari
  • RESTful API
  • Visual Basic
  • Advanced memory management
  • Fundamentals of memory
  • Heap and stack
  • Interfaces
  • BST trees
  • WCF
  • Classes
  • Threads

What to look for in a C# developer

Developed by Microsoft in 2000 to combine the computing ability of C++ with the simplicity of Visual Basic, C# is a programming language based on C++ and similar to Java. Found in almost all Microsoft products, it is used mainly for developing desktop applications. When recruiting for a C# developer there are several important factors to address.

Your C# developer candidate will need to possess knowledge of C# unit testing frameworks like; nUnit, SpecFlow, MSTest and xUnit. Your candidate should also know how to use C# building tools such as TFS, TeamCity, Jenkins, Cruise Control .NET and Azure DevOps (old TFS).

DevSkiller’s C# interview questions and online tests are the perfect asset to your business’s recruitment strategy. Our screening tool tests candidates online, and automatically generated reports present the results in a simple and easy to follow way. Which means you don’t have to be an expert in C#, to be able to hire the perfect candidate for the role.

Build your own custom C# interview questions and online tests

Perhaps you want to take our C# interview questions and online tests to the next level and customize them to get more out of them? No problem.

The DevSkiller task wizard lets you build custom tests using your own codebase. You can select languages other than C# if required and choose the exact skills and technologies you want to test. With our customized C# interview questions and online tests you set the difficulty-level and duration of each test, all while being able to observe candidates in real-time. Finding your next C# developer has never been simpler.

Like the look of our C# interview questions and online tests but need proof?

If you’re still not 100% convinced by our screening tool, don’t worry. It’s sensible to want some assurances before you part with your company’s finances. Check out the following case study from one of our past clients and see what we did for them:

DB1

DB1 is a software development company. They develop robust and reliable solutions for medium and large companies.

When it came to DB1’s recruitment process, the company had 5 stages, one of them being a technical challenge. Candidates had 5 days to complete the challenge and the company needed the assistance of a developer to assess the results. Often the candidates would become disengaged with the challenges or need reminding to complete the tests on time. Thanks to the implementation of DevSkiller testing, DB1 saw instant improvement in their recruitment process.

With DevSkiller the entire technical test stage of recruitment for DB1 decreased, from around 5 – 10 days, to between 3 – 7 days with DevSkiller. Also, not only did the customer experience improve, but because our system offers automatically generated test results, there is now no need for an additional developer to be brought in for the assessment of tests.

DB1 quickened up their whole technical screening process. They are also much more confident that the candidates they select to proceed, are the right ones for the role.

 “DevSkiller reduced the time on the technical test stage and reduced our dependence on other areas. It was faster to approve candidates for the next stage since we had an automatic score. Now the revision process is faster, most of the time we have instant results and scores that help us decide which candidate is approved to the next stage of the selection process. Our candidates say it’s a great platform and it really tests their knowledge.”

Nathalia G.R. Da Silva– Employer Branding & Tech Recruiter at DB1 Group

Domande frequenti

Quanto tempo ci vuole per configurare DevSkiller?

DevSkiller is designed to quicken up your recruitment process, so it is quick and simple to set-up. Really all that is required is for you to create your account with us. Once registered, there are hundreds of predefined C# tests at your disposal.

Testing is carried out online so all you need to do is send out a test invite and your candidates can get started working on their C# interview questions and online tests. We offer a wide selection of junior, middle, and senior-level C# online tests and you can limit how long each test will last.

Cosa pensano i candidati dei test DevSkiller?

We receive regular feedback that candidates enjoy working on DevSkiller’s variety of online tests. For most, having a chance to finally prove their skills in a fair setting is refreshing and they appreciate that opportunity. Many developers often get asked to recite coding patterns and algorithms. Outdated challenges that don’t accurately reflect the work they do. By implementing RealLifeTesting into our C# interview questions and online tests, DevSkiller can get much closer to the real thing.

Candidates love that at DevSkiller we use conventions that are normal to developers, like unit testing, and cloning to GIT from a personal IDE. Once they are given a DevSkiller test, candidates appreciate that our approach is different to what they might have encountered before and that they are finally being given the chance to prove their skills in a fair setting.

Cosa si fa contro il plagio?

You need to be able to trust the results of our tests so we do everything in our power to eliminate the chance of any plagiarism. A number of anti-plagiarism tools are implemented including checking the candidate’s entered code and looking at the way each question is answered. The answers are automatically cross-referenced with every answer received in our system, if there is a match we can categorically confirm that the candidate cheated and they can be eliminated from the assessment.

We can also use screen recording to check if the candidate is looking at a different screen when undertaking a test. As well as to implement a range of social listening tools, check the candidate’s IP address and use live pair notifications. This combination of tools means plagiarism will not go undetected.