C# Quiz

by Barry Allen | Nov 19, 2022 | Assessment, Interview

Welcome to our C# quiz! C# is a modern, powerful programming language that’s widely used for developing desktop applications, video games, and web applications. Whether you’re just starting to learn C# or you’re an experienced developer, this quiz will challenge your knowledge of the language and help you identify areas where you might need to improve. With a mix of multiple choice and coding questions, you’ll be tested on topics like syntax, data types, object-oriented programming, and more. So, let’s get started and see how well you know C#!

C# Quiz

Test your knowledge of the C# programming language with our interactive C# quiz! Challenge yourself with a variety of multiple choice and coding questions on topics ranging from syntax to object-oriented programming.

1 / 30

What does enum refer to in the following code?

Group of variables

Group of constant

Group of operator

All of these

2 / 30

To achieve security and hide important details, we can use ________ classes & methods.

Abstract

Polymorphism

Inheritance

Exceptions

3 / 30

If you don't want other classes to inherit from a class, use the _________ keyword.

const

signed

sealed

case

4 / 30

What is the function of WriteAllText() in C#?

Read and write in a file

Write in any file

Create a new file & write content in it.

Replace the exising content with new

5 / 30

What will be the output of the following program? using System;
namespace MyApp
{
class Function
{
static void Main(string[] args)
{
int myInt = 11;
double myDouble = myInt;

Console.WriteLine(myInt);
Console.WriteLine(myDouble);
}
}
}

11 11

11,11

11.111

6 / 30

The following code is an example of? using System;

namespace MyApp
{
class Planets
{
private string model = "Jupiter";

static void Main(string[] args)
{
Planets myObj = new Planets();
Console.WriteLine(myObj.model);
}
}
}

Polymorphism

Private Modifier

Abstraction

Enums

7 / 30

What will be the output of the following code? using System;
using System.Linq;

namespace MyApp
{
class Program
{
static void Main(string[] args)
{
int[] myNum = {13, 4, 21, 34, 10};
Console.WriteLine(myNum.Max());

Console.WriteLine(myNum.Sum());
}
}
}

82, 34

34, 82

34 82

8 / 30

Which of the following code will print output of 7?

using System; namespace MyApp { class Program { static void Main(string[] args) { Console.Write(Math.Round(6.99)); } } }

using System; namespace MyApplication { class Program { static void Main(string[] args) { Console.WriteLine(Math.Round(7)); } } }

using System; namespace MyApplication { class Program { static void Main(string[] args) { Console.WriteLine(Math.Round(7.99)); } } }

using System; namespace MyApplication { class Program { static void Main(string[] args) { Console.WriteLine(Math.Round(6)); } } }

9 / 30

OOP'S work on the basic principle of

Objects

Procedural programming

Don't repeat Yourself

Methods

10 / 30

When a parameter is passed to a method, it is called _______.

class

Argument

Object

Null Function

11 / 30

Which is the predefined method?

main()

function()

method()

myNum()

12 / 30

What is a method in C#?

It is a block of code which only runs when it is called

It is used for certain actions which is known as functions.

It is used to pass data that is known as parameters.

All of the above

13 / 30

What is the use of system.linq namespace?

It is array library

It is used for array method such as min, max and sum.

It is a array class

All of the above

14 / 30

What will be the output of the following code? using System;

namespace MyApp
{
class Program
{
static void Myelement(string games = "Tennis")
{
Console.WriteLine(games);
}

static void Main(string[] args)
{
Myelement("Football");
Myelement("Basketball");
Myelement();
Myelement("Cricket");
}
}
}

Football Basketball Tennis Cricket

Football Basketball Cricket

Tennis

Error

15 / 30

What will be the output of the following code? using System;
namespace MyApp
{
class Program
{
static void Main(string[] args)
{
string[] fruits = {"apple" , "mango" , "grapes"};
foreach (string i in fruits){ Console.WriteLine(i); }
}
} }

apple mango

apple mango grapes

apple

16 / 30

What is the output of the following code?

using System;

namespace MyApplication
{
class Program
{
static void Main(string[] args)
{
string p = "10";
string q = "20";
string r = p + q;
Console.WriteLine(r);
}
}
}

1020

17 / 30

Which of the following code will print output "Table tennis"?

using System; namespace MyApp { class Program { static void Main(string[] args) { string text = "Table tenbnis"; Console.WriteLine(text); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { string text = "Table tennbis"; Console.WriteLine(text); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { string text = "Table tbennis"; Console.WriteLine(text); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { string text = "Table tennibs"; Console.WriteLine(text); } } }

18 / 30

What will be output of the following code? using System;
namespace MyApp
{
class Program
{
static void Main(string[] args)
{
string txt = "You can use pen \ pencil in your homework.";
Console.WriteLine(txt); }
}
}

You can use pen \ pencil in your homework.

You can use pen pencil in your homework.

None

19 / 30

Which is the necessary sign while using the string interpolation method in C#?

20 / 30

What will be the output of the following code? using System;
namespace MyApp
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(Math.Abs(-5.4)); }
}
}

-5.4

5.4

21 / 30

Which of the following code will print output as True?

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 7; Console.WriteLine(!(p>5 && p < 12); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 12; Console.WriteLine(!(p>5 && p < 16); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 3; Console.WriteLine(!(p>2 && p < 12); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 8; Console.WriteLine(!(p>12 && p < 7); } } }

22 / 30

Which of the following code will print an output 23?

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 20; p +=3; Console.Write(p); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 20; p +=23; Console.Write(p); } } }

using System; namespace MyApp { class Program { static void Main(string[] args) { int p = 23; p +=23; Console.Write(p); } } }

All of the above

23 / 30

Console.ReadLine() is used in C# to

to read output

to read line

to get user input

None

24 / 30

________ is the property of C# in which we can assign a value of one data type to another type.

Type Casting

Casting

Recursion

Function

25 / 30

What will be the output the of following code? using System;
namespace MyApp
{
class Program
{
static void Main(string[] args)
{
int p, q, r;
p = q = r = 20; Console.Write(p + q + r); }
}
}

26 / 30

What is the output of the following code?

using System;
namespace MyApp
{
class Program
{
static void Main(string[] args)
{
Console.Write("My name is Peter");
Console.Write("I am genius."); }
}
}

My name is Peter I am genius.

My name is PeterI am genius

I am genius

27 / 30

C# is a case-sensitive language.

True

False

28 / 30

Console is a class of ________ and has a method ________.

MyClass, writeline()

namespace, writeLine()

writeLine(), systemNamespace

System namespace, writeLine()

29 / 30

What is "using system" in the below code?

using System;
namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}

Using system mark the beginning of code.

Using system means container.

Using system means that we can use classes from system namespace.

Using system is the main method.

30 / 30

C# is a programming language that is created by ________ & runs on ________ framework.

Microsoft, .NET

Amazon, Frontened

Google, SQL

None

Your score is

Author

Barry Allen

A Full Stack Developer with 10+ years of experience in technical content creation.

View all posts

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Author

Barry Allen

A Full Stack Developer with 10+ years of experience in technical content creation.

View all posts

C# Quiz

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