39 interview questions on C# - Fundamentals for developers (2026)

Easy

9 votes1231 runs1 comment

Write a C# class with a private int age field and getter and setter methods for it.

Back-end developer

access

field

Anonymous authorat Mar 16, 2022

Medium

6 votes1312 runs

1 comment

An event in an ASP.NET application:

Back-end developer

asp.net

controller

Anonymous authorat Mar 16, 2022

Easy

6 votes1173 runs0 comment

Simple inheritance between a parent class and a child class in C#

Back-end developer

inheritance

classes

Anonymous authorat Mar 16, 2022

Easy

4 votes490 runs

1 comment

Initialize a new Vehiclue object containing a string field in C#

Back-end developer

classes

objects

Auroreat Aug 30, 2024

Medium

2 votes1200 runs

2 comments

The PFX Framework:

Back-end developer

multithreading

parallelization

c#

Anonymous authorat Mar 16, 2022

Easy

2 votes1145 runs0 comment

How to declare a SortedList<Key,Value> in C#

Back-end developer

collections

generics

Anonymous authorat Mar 9, 2023

Medium

2 votes1105 runs0 comment

Write a C# function that displays a matrix.

Back-end developer

arrays

loops

Anonymous authorat Mar 25, 2022

Easy

2 votes483 runs0 comment

What is the new syntax for creating an object in C# 9.0?

Back-end developer

object initializer

Auroreat Aug 30, 2024

Medium

2 votes470 runs0 comment

What is an ASPX file?

Back-end developer

asp.net

c#

html

Auroreat Aug 30, 2024

Medium

2 votes378 runs0 comment

What is a property in C#?

Back-end developer

properties

methods

fields

Anonymous authorat Jan 30, 2025

Easy

1 vote355 runs0 comment

Choose the two correct answers:

Back-end developer

arrays

variables

Anonymous authorat Mar 16, 2022

Hard

0 vote1161 runs

1 comment

In C#, a thread:

Back-end developer

c#

thread

asynchronous

Anonymous authorat Mar 16, 2022

Medium

0 vote1158 runs1 comment

How to deploy an ASP.NET application

Back-end developer

config

deployment

Anonymous authorat Mar 16, 2022

Medium

0 vote1081 runs0 comment

About objects of type List<T>:

Back-end developer

list

sort

add

Anonymous authorat Mar 16, 2022

Easy

0 vote982 runs0 comment

Write a C# program that prints 6WeLoveDevs to the console.

Back-end developer

console

strings

Anonymous authorat Mar 25, 2022

Easy

0 vote805 runs1 comment

Lists in C#:

Back-end developer

list

c#

Anonymous authorat Mar 28, 2023

Easy

0 vote771 runs0 comment

About interfaces in C#

Back-end developer

interfaces

Anonymous authorat Mar 16, 2022

Medium

0 vote628 runs0 comment

Windows Presentation Foundation (WPF) :

Back-end developer

gui

xaml

c#

Anonymous authorat Mar 16, 2022

Medium

0 vote515 runs1 comment

Role management in .NET:

Back-end developer

role

role management

role provider

Auroreat Aug 23, 2024

Easy

0 vote384 runs

1 comment

Write a C# program that swaps the values of two variables.

Back-end developer

variables

assignment

Anonymous authorat Mar 25, 2022

39 interview questions on C# - Fundamentalsfor developers (2026)

Test your technical skills before an interview of C# - Fundamentals with 39 corrected questions. Beginner, Intermediate or Expert level.

Write a C# class with a private int age field and getter and setter methods for it.

An event in an ASP.NET application:

Simple inheritance between a parent class and a child class in C#

Initialize a new Vehiclue object containing a string field in C#

The PFX Framework:

How to declare a SortedList<Key,Value> in C#

Write a C# function that displays a matrix.

What is the new syntax for creating an object in C# 9.0?

What is an ASPX file?

What is a property in C#?

Choose the two correct answers:

In C#, a thread:

How to deploy an ASP.NET application

About objects of type List<T>:

Write a C# program that prints 6WeLoveDevs to the console.

Lists in C#:

About interfaces in C#

Windows Presentation Foundation (WPF) :

Role management in .NET:

Write a C# program that swaps the values of two variables.