Most Asked Dot Net Interview Questions for Freshers

Software Development | Design, Digital, Technology | Oct 29,2021 | By Shashvathi G

Everyone should have a thorough understanding of the IT industry, since it will have a substantial influence on their future work opportunities. The most commonly asked questions will be answered on this page. Here are some questions to ask during an online interview.

1.What is the meaning of Constructor?

The new operator, which invokes the class's function Object() { [native code] }, is used to create an object on the managed heap. The function Object() { [native code] } is used to set up the object's members. Within Class, many constructors might be defined.

2.What distinguishes the Constructor?

This is one of the most commonly interview questions. Constructors in C# have the same name as the class they belong to. It's possible to overwhelm it. It has no return type at all, not even void. Constructors must be public; otherwise, object initialization is not permitted if they are private. The compiler creates a default function Object() { [native code] } if no function Object() { [native code] } is supplied for a class. The function Object() { [native code] } can be static, and it is only called once before a class instance is produced. It must be devoid of all parameters and access modifiers (private, public).

3.What is Destructor, exactly?

The class's Destructor function is used to de-initialize resources allocated during an object's initialization. In C#, the destructor is known as Garbage Collector, and it is a feature of the CLR that allows you to reuse an object's memory when it is no longer needed.

4.What distinguishes Destructor from other similar programmes?

Destructor is the same name as the class in C#. It doesn't have a return type and doesn't accept any arguments. A character that comes before the name. It is not possible to overburden the system.

5.What are the various Constructor types?

The different types of constructors in C# are as follows: Constructor by Default Constructor with Parameters Constructor for Hire Constructor Copy Constructor of Statics

6.What are properties, exactly?

Smart fields are a type of property. Fields are the class's data members. Properties are just like fields in that they may be accessed using the same syntax. They come with two add-ons: get-retrieve the values of data members set-data-member-values-set-data-member-values-set The property becomes a read-only property if just get is provided. The property becomes a write-only property if just one set is supplied. If both are given, the property will be read/write.

7.What is the definition of a static member?

Rather than belonging to a single object, static members belong to the type class. As a result, each class has just one copy of static members. It is shared by all of the class's objects.

8.What is the Non-Static technique, and how does it work?

Non-static methods are also referred to as instance methods since they are always invoked with the class's object. To put it another way, the Non-Static method is called with an object reference.

9.What do you mean by exceptions?

This is one of the most commonly interview questions. Exceptions, often known as runtime errors, are mistakes that occur during the execution of a programme. They can usually be spotted and dealt with in code. Because of a runtime error, the.NET framework stops the programme from running. Validating user input, dividing by zero, and stack overflow are just a few examples. The System is in place. The Exception class has a number of methods and attributes that may be used to find out what went wrong. Exceptions are stated to throw what is really thrown as an object generated from the System when they occur. This is an exception class.

10.What are the many kinds of exceptions?

Exceptions can be of two types: Exceptions at the system level Exceptions at the application level

11.What is the definition of Exception Handling? And how do you deal with it?

This is one of the most commonly interview questions. Exception Handling is the process of detecting and dealing with runtime issues. To properly manage these runtime issues, C# has try-catch blocks. The try block contains code that may throw an exception, whereas the catch block contains code that handles the exception. Whether or whether an exception is thrown, the finally block is always performed. It is the block where code such as terminating a file or connection or releasing resources can be written.

12.Is it possible for a try block to contain several catch blocks?

Yes, one attempt block can have many catch blocks.

13.What is the definition of a partial class?

The term partial can be used to distribute a class over multiple source files. All class definition source files are compiled into a single file that contains all class members.

14.Is multiple inheritance supported in C#?

Multiple inheritances are not supported in C#.

15.What are the many kinds of polymorphisms?

Inheritance and the virtual keyword can be used to produce polymorphism. Polymorphism can be divided into two categories: Polymorphism in compile time or static Dynamic polymorphism, often known as runtime polymorphism, is a type of polymorphis Function or operator overloading is used to achieve static polymorphism, whereas method overriding is used to establish dynamic polymorphism.

16.What is Method Overloading, and how does it affect you?

Overloaded methods are those that have the same name but distinct signatures. The datatypes of the arguments, the number of parameters, and the order in which they are supplied to the function make up a method's signature.

17.What does it mean when an operator is overloaded?

Operator overloading is the process of defining the meaning of an operator in terms of a class. Operator overloading in C# allows for type extension. Method overloading and operator overloading are closely linked. We need to build a function called an operator function to specify the meaning of the operator. This function is defined by the operator keyword, and it specifies the operator's activity in relation to its class. It is required that the operator function is both public and static.

18.What is method overriding, and how does it work?

Methods with the identical names, signatures, and return types are overridden, but they are in distinct classes in the hierarchy. To define method overriding in C#, utilise the virtual and override keywords. The ability to resolve method invocation at runtime is provided via method overriding. It's also known as late binding.

19.What is the definition of shadowing?

By employing the keyword new, shadowing hides the base class member in the derived class.

20.What is the definition of a Sealed class?

It is not possible to inherit a sealed class. The Sealed class can be used to prevent the class from inheriting further.

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