.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
 
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Top 5 Contributors of the Month
david stephan

Home >> Interview Question >> VB.Net >> Post New Question Subscribe to Interview Questions

Can we override a constructor?

Posted By :Subhransu Sekhar Jena     Posted Date :September 30, 2014    Points :40   Category :VB.Net 
No

You can also find related Interview Question to Can we override a constructor?  below: 

What is Method Overriding? How to override a function in C#?

  
Use the override modifier to modify a method, a property, an indexer, or an event. An override method provides a new implementation of a member inherited from a base class. The method overridden by an override declaration is known as the overridden base method. The overridden base method must have the same signature as the override method.
You cannot override a non-virtual or static method. The overridden base method must be virtual, abstract, or override. (More...)

Difference between type constructor and instance constructor? What is static constructor, when it will be fired? And what is its use?

  
(Class constructor method is also known as type constructor or type initializer)
Instance constructor is executed when a new instance of type is created and the class constructor is executed after the type is loaded and before any one of the type members is accessed. (It will get executed only 1st time, when we call any static methods/fields in the same class.) Class constructors are used for static field initialization. Only one class constructor per type is permitted, and it cannot use the vararg (variable argument) calling convention. (More...)

What is Private Constructor? and it's use? Can you create instance of a class which has Private Constructor?

  
When a class declares only private instance constructors, it is not possible for classes outside the program to derive from the class or to directly create instances of it. (Except Nested classes)
Make a constructor private if:

1) You want it to be available only to the class itself. For example, you might have a special constructor used only in the implementation of your class' Clone method.

2) You do not want instances of your component to be created. For example, you may have a class containing nothing but Shared utility functions, and no instance data. Creating instances of the class would waste memory. (More...)

Constructor and Destructor

  
Constructor

1. The Constructor is the first method that is run when an instance of a type is created. In visual basic a constructor is always Sub new ().

2. Constructor are use to initialize class and structure data before use. Constructor never returns a value and can be overridden to provide custom initialization functionality.

3. The constructor provides a way to set default values for data or perform other necessary functions before the object available for use.

Destructor:
-------------
Destructors are called just before an object is destroyed and can be used to run clean-up code. You can't control when a destructor is called. (More...)

What is the difference between Overload and Override?

  
Overload is the another version of the same function into the class. There can be different parameters, return type in overload functions (in brief: Same function and different parameters).
Override is entirely overriding the base class function and creating our own version in the child class. Base class and child class function name and return type should be same. (More...)

What is a private constructor? Where will you use it?

  
When you declare a Constructor with Private access modifier then it is called Private Constructor. We can use the private constructor in singleton pattern.

If you declare a Constructor as private then it doesn't allow to create object for its derived class, i.e you loose inherent facility for that class. (More...)

Can you declare an override method to be static if the original method is not static?

  
No. The signature of the virtual method must remain the same.
(Note: Only the keyword virtual is changed to keyword override). (More...)

What is Static Constructor?

  
It is invoked when the instance of the class is created. (More...)

Can you override private virtual methods in .NET Framework?

  
No, moreover, you cannot access private methods in inherited classes, have to be protected in the base class to allow any sort of access. (More...)

What exactly a Constructor is doing ?

  
Constructor Creates as well as Initialized the objects. (More...)

What is the work of a constructor?

  
Constructor creates and initialises the objects in an application. (More...)

Quick Links For Interview Questions Categories:
ASP.Net Windows Application   .NET Framework   C#   VB.Net   ADO.Net  
Sql Server   SharePoint   Silverlight   OOPs   JQuery   JavaScript/VBScript
Biztalk Patten/Practices .IIS WCF WPF WWF
Networking Aptitude Others   All      

Find questions, FAQ's and their answers related to .NET, C#, Vb.Net, Sql Server and many more.

 
Now you can find lots of .NET, C#, Vb.Net, SQL Server,Windows, ASP.Net related Questions and their Answers here at www.dotnetspark.com. Our aim is to help you pass your certification Exams (MCP, MCSD, MCAD etc.,) with flying scores and get good name in your company.

So, Start looking our Interview Question section daily and improve your .NET Skills. You can also help others by posting Interview Questions and their Answers in this section.


Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend