|
Advantages of migrating to VB.NET ?
.NET Interview Questions and Answers
(Continued from previous question...)
12. Advantages of migrating to VB.NET ?
Visual Basic .NET has many new and improved language features — such as inheritance, interfaces, and overloading that make it a powerful object-oriented programming language. As a Visual Basic developer, you can now create multithreaded, scalable applications using explicit multithreading. Other new language features in Visual Basic .NET include structured exception handling, custom attributes, and common language specification (CLS) compliance.
The CLS is a set of rules that standardizes such things as data types and how objects are exposed and interoperate. Visual Basic .NET adds several features that take advantage of the CLS. Any CLS-compliant language can use the classes, objects, and components you create in Visual Basic .NET. And you, as a Visual Basic user, can
access classes, components, and objects from other CLS-compliant programming languages without worrying about language-specific differences such as data types.
CLS features used by Visual Basic .NET programs include assemblies, namespaces, and attributes.
These are the new features to be stated briefly:
Inheritance
Visual Basic .NET supports inheritance by allowing you to define classes that serve as the basis for derived classes. Derived classes inherit and can extend the properties and methods of the base class. They can also override inherited methods with new implementations. All classes created with Visual Basic .NET are inheritable by default. Because the forms you design are really classes, you can use inheritance to define new forms based on existing ones.
Exception Handling
Visual Basic .NET supports structured exception handling, using an enhanced version of the Try...Catch...Finally syntax supported by other languages such as C++.
Structured exception handling combines a modern control structure (similar to Select Case or While) with exceptions, protected blocks of code, and filters. Structured exception handling makes it easy to create and maintain programs with robust, comprehensive error handlers.
Overloading
Overloading is the ability to define properties, methods, or procedures that have the same name but use different data types. Overloaded procedures allow you to provide as many implementations as necessary to handle different kinds of data, while giving the appearance of a single, versatile procedure. Overriding Properties and Methods The Overrides keyword allows derived objects to override characteristics inherited from parent objects. Overridden members have the same arguments as the members inherited from the base class, but different implementations. A member's new implementation can call the original implementation in the parent class by preceding the member name with MyBase.
Constructors and Destructors
Constructors are procedures that control initialization of new instances of a class. Conversely, destructors are methods that free system resources when a class leaves scope or is set to Nothing. Visual Basic .NET supports constructors and destructors using the Sub New and Sub Finalize procedures.
Data Types
Visual Basic .NET introduces three new data types. The Char data type is an unsigned 16-bit quantity used to store Unicode characters. It is equivalent to the .NET
Framework System. Char data type. The Short data type, a signed 16-bit integer, was named Integer in earlier versions of Visual Basic. The Decimal data type is a 96-bit signed integer scaled by a variable power of 10. In earlier versions of Visual Basic, it was available only within a Variant.
Interfaces
Interfaces describe the properties and methods of classes, but unlike classes, do not provide implementations. The Interface statement allows you to declare interfaces, while the Implements statement lets you write code that puts the items described in the interface into practice.
Delegates
Delegates objects that can call the methods of objects on your behalf are sometimes described as type-safe, object-oriented function pointers. You can use delegates to let procedures specify an event handler method that runs when an event occurs. You can also use delegates with multithreaded applications. For
details, see Delegates and the AddressOf Operator.
Shared Members
Shared members are properties, procedures, and fields that are shared by all instances of a class. Shared data members are useful when multiple objects need to use information that is common to all. Shared class methods can be used without first creating an object from a class.
References
References allow you to use objects defined in other assemblies. In Visual Basic .NET, references point to assemblies instead of type libraries. For details, see References and the Imports Statement.
Namespaces Namespaces prevent naming conflicts by organizing classes, interfaces, and methods into hierarchies.
Assemblies
Assemblies replace and extend the capabilities of type libraries by, describing all the required files for a particular component or application. An assembly can contain one or more namespaces.
Attributes
Attributes enable you to provide additional information about program elements. For example, you can use an attribute to specify which methods in a class should be exposed when the class is used as a XML Web service.
Multithreading
Visual Basic .NET allows you to write applications that can perform multiple tasks independently. A task that has the potential of holding up other tasks can execute on a separate thread, a process known as multithreading. By causing complicated tasks to run on threads that are separate from your user interface, multithreading makes
your applications more responsive to user input.
(Continued on next question...)
Other Interview Questions
- What is .NET?
- How many languages .NET is supporting now?
- How is .NET able to support multiple languages?
- How ASP .NET different from ASP?
- What is smart navigation?
- What is view state?
- How do you validate the controls in an ASP .NET page?
- Can the validation be done in the server side? Or this can be done only in the Client side?
- How to manage pagination in a page?
- What is ADO .NET and what is difference between ADO and ADO.NET?
- Observations between VB.NET and VC#.NET?
- Advantages of migrating to VB.NET ?
- Advantages of VB.NET
- Using ActiveX Control in .Net
- What is Machine.config?
- What is Web.config?
- What is the difference between ADO and ADO.NET?
- What is the difference between VB and VB.NET?
- What is a Strong Name?
- What is a Manifest?
- Creating a Key Pair?
- What is the difference between "using System.Data;" and directly adding the reference from "Add References Dialog Box"?
- What is GAC?
- What is a Metadata?
- What is managed code and managed data?
- What is .NET / .NET Framework?
- What is Reflection?
- What is "Common Type System" (CTS)?
- What is "Common Language Specification" (CLS)?
- What is "Common Language Runtime" (CLR)?
- What are Attributes?
- What are the Types of Assemblies?
- What is an Intermediate language?
- ASP.NET Authentication Providers and IIS Security
- What is the difference between ASP and ASP.NET?
- Using COM Component in .Net
- What is an assembly?
- What is a Web Service?
- webFarm Vs webGardens
- What is the difference between a namespace and assembly name?
- What’s a Windows process?
- What’s typical about a Windows process in regards to memory allocation?
- Explain what relationship is between a Process, Application Domain, and Application?
- What are possible implementations of distributed applications in .NET?
- What are the consideration in deciding to use .NET Remoting or ASP.NET Web Services?
- What’s a proxy of the server object in .NET Remoting?
- What are remotable objects in .NET Remoting?
- What are channels in .NET Remoting?
- What security measures exist for .NET Remoting in System.Runtime.Remoting?
- What is a formatter?
- Choosing between HTTP and TCP for protocols and Binary and SOAP for formatters, what are the trade-offs?
- What’s SingleCall activation mode used for?
- What’s Singleton activation mode?
- How do you define the lease of the object?
- Can you configure a .NET Remoting object via XML file?
- How can you automatically generate interface for the remotable object in .NET with Microsoft tools?
- What is Delegation?
- What is "Microsoft Intermediate Language" (MSIL)?
- Differences between Datagrid, Datalist and Repeater?
- I am constantly writing the drawing procedures with System.Drawing.Graphics, but having to use the try and dispose blocks is too time-consuming with Graphics objects. Can I automate this?
- How do you trigger the Paint event in System.Drawing?
- With these events, why wouldn’t Microsoft combine Invalidate and Paint, so that you wouldn’t have to tell it to repaint, and then to force it to repaint?
- How can you assign an RGB color to a System.Drawing.Color object?
- What class does Icon derive from? Isn’t it just a Bitmap with a wrapper name around it?
- Before in my VB app I would just load the icons from DLL. How can I load the icons provided by .NET dynamically?
- When displaying fonts, what’s the difference between pixels, points and ems?
- What is the difference between VB 6 and VB.NET?
- What are the authentication methods in .NET?
- What is Serialization in .NET?
- What’s the use of System.Diagnostics.Process class?
- Difference Abstract class and Interface
- re-clarification of object based:
- How to achieve Polymorphism in VB.Net?
- Difference between Class And Interface
- What doesu mean by .NET framework?
- What is assembly?
- What is namespaces?
- NET framework overview
- What is the base class of .NET?
- Explain assemblies.
- Name some of the languages .NET support?
- ADO.NET features? Benefits? Drawbacks?
- How many types of exception handlers are there in .NET?
- Difference between Panel and GroupBox classes?
- What is the base class of Button control?
- What is Response object? How is it related to ASP’s Response object?
- What is IIS? Have you used it?
- Main differences between ASP and ASP.NET.
- What are the advantages and drawbacks of using ADO.NET?
- Why The JavaScript Validation Not Run on the Asp.Net Button But Run SuccessFully On The HTML Button
- what is the difference between user control an custom control? advantages/disadvantages?
- What’s the difference between Response.Write() andResponse.Output.Write()?
- What is the use of ErrorProvider Control?
- What is CLR?
- What is Delegate and what is it used for ?
- How is meant by DLL ?
- Which DLL translate XML to SQL in IIS?
- Can anyone tell me about Secure Socket Layer? How to make use of the technology?
- What is the Differnce Between Response.write & response.output.Write
- Which dll is required to translate XML to SQL in IIS ?
- What is an interface and what is an abstract class? Please, expand by examples of using both. Explain why.
- What is serialization, how it works in .NET?
- What should one do to make class serializable?
- What exactly is being serialized when you perform serialization?
- How does output caching work in ASP.NET?
- What is connection pooling and how do you make your application use it?
- What are different methods of session maintenance in ASP.NET?
- What is Viewstate?
- Can any object be stored in a Viewstate?
- What should you do to store an object in a Viewstate?
- Explain how Viewstate is being formed and how it’s stored on client.
- What do you know about ADO.NET’s objects and methods?
- Explain DataSet.AcceptChanges and DataAdapter.Update methods.
- When we go for html server controls and when we go for web server controls?
- ASP.NET interview questions only (1)
- ASP.NET interview questions only (2)
- ASP.NET interview questions only (3)
|