C# MCQ: C# Multiple Choice Questions And Answers

C# MCQ with answers and explanations for placement tests and job interviews. These solved C# programming MCQ questions are useful for the campus placement of all freshers including Engineering Students, MCA students, Computer and IT Engineers, etc.

Our C# MCQ ( C# multiple Choice Questions ) focuses on all areas of the C# programming language. We will regularly update the quiz and most interesting thing is that questions come in a random sequence. So every time you will feel new questions.

Note: Your score along with correct answers will be visible after answering all of these questions.

C# MCQ: C# Programming Multiple Choice Questions

1 / 33

Abstract class contains _____.

Abstract methods

Non Abstract methods

Both

None

2 / 33

Structs can be inherited?

Yes

3 / 33

Select the operator which is used for casting of object to a type or a class.

"as" operater

"is" operater

"this" operater

"at" operater

4 / 33

What is stored in Heap?

int

enum

reference type

long

5 / 33

Select the class which is immutable

System.Text.StringBuilder

System.String

System.StringBuilder

System.Text.Builder

6 / 33

Select the method that doesn’t guarantee the garbage collection of an object.

Dispose()

Finalize()

Open()

None of this

7 / 33

What is sealed Modifier

Prevents inheritance of a class

Prevents method overloading

Prevents polymorphism

Prevents illegal access to a class

8 / 33

Choose the wrong statement about properties used in C#.Net?

Each property consists of accessor as getting and set.

A property cannot be either read or write-only.

Properties can be used to store and retrieve values to and from the data members of a class.

Properties are like actual methods that work like data members.

9 / 33

Struct’s data members are ___ by default.

Protected

Public

Private

Default

10 / 33

Which of the following statements are correct for C# language?

Every derived class does not define its own version of the virtual method.

By default, the access mode for all methods in C# is virtual.

If a derived class, does not define its own version of the virtual method, then the one present in the base class gets used.

All of the above.

11 / 33

The correct way to overload +operator?

public sample operator + (sample a, sample b)

public abstract operator + (sample a, sample b)

public static operator + (sample a, sample b)

All of the mentioned above

12 / 33

Which is the base class in .NET from which all the classes are derived from?

System.Object

System.Objects

Systems.Object

Systems.Objects

13 / 33

The default scope for the members of an interface is _____.

private

public

protected

internal

14 / 33

Which of the following keywords is used to refer base class constructor to subclass constructor?

this

static

base

extend

15 / 33

Which of the following statements is incorrect about delegate?

Delegates are reference types.

Delegates are object-oriented

Delegates are type-safe.

Only one can be called using a delegate.

16 / 33

Select the operator used to check the compatibility of an object with a given type

"as"operater

"is" operater

"this" operater

"at" operater

17 / 33

Which of the following is incorrect about constructors?

Defining of constructors can be implicit or explicit.

The calling of constructors is explicit.

Implicit constructors can be parameterized or parameterless.

Explicit constructors can be parameterized or parameterless.

18 / 33

CLR is the .Net equivalent of _____.

Java Virtual machine

Common Language Runtime

Common Type System

Common Language Specification

19 / 33

The space required for structure variables is allocated on the stack.

True

False

Depends on environment

20 / 33

If a class ‘demo’ had ‘add’ property with getting and set accessors, then which of the following statements will work correctly?

math.add = 15;

math m = new math(); m.add = 15;

Console.WriteLine(math.add);

None of the mentioned

21 / 33

The point at which an exception is thrown is called the _____.

Default point

Invoking point

Calling point

Throw point

22 / 33

Select the control which can’t be placed in the toolbox

Custom Control

User control

Server Control

ASP Control

23 / 33

Shared Assemblies can be stored in Global Assembly Cache.

True

False

24 / 33

Generics are used to make reusable code classes to

decrease the code redundancy

improve code performance

improve code indentation

improve code documentation

25 / 33

Can you specify accessibility modifier for methods inside an interface?

Yes

26 / 33

What is used as inheritance operator in C#?

Comma

Dot

Colon

SemiColon

27 / 33

What is the value returned by function compareTo( ) if the invoking string is less than the string compared?

Zero

A value of less than zero

A value greater than zero

None of the mentioned

28 / 33

Select the two types of threads mentioned in the concept of multithreading?

Foreground

Background

Only foreground

Both foreground and background

29 / 33

Select the type of exceptions which is NOT used in .Net.

NullReferenceException

OutOfMemoryException

StackOverflowException

StackUnderflowException

30 / 33

In c#, the attribute’s information for a Class can be retrieved at

Compile time

Runtime

Both

31 / 33

Reference is a ___.

Copy of class which leads to memory allocation.

Copy of class that is not initialized.

Pre-defined data type.

Copy of class creating by an existing instance.

32 / 33

What is used in conversion where the conversion is defined between the expression and the type.

Ctype

directcast

multicast

Cttype

33 / 33

The data members of a class by default are?

protected, public

private, public

private

public

Your score is

C# MCQ: C# Multiple Choice Questions And Answers

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