.Net Remoting Interview Questions

1. What is .NET Remoting?

   .NET Remoting is an enabler for application communication. It is a generic system for different applications to use to communicate with one another. .NET objects are exposed to remote processes, thus allowing interprocess communication.

2. What’s a Windows process?

   It’s an application that’s running and had been allocated memory.

3. What are the consideration in deciding to use .NET Remoting or ASP.NET Web Services?

   Remoting is a more efficient communication exchange when you can control both ends of the application involved in the communication process.  Web Services provide an open-protocol-based exchange of informaion.  Web Services are best when you need to communicate with an external organization or another (non-.NET) technology.

4. What are channels in .NET Remoting?

   Channels represent the objects that transfer the other serialized objects from one application domain to another and from one computer to another, as well as one process to another on the same box. A channel must exist before an object can be transferred.

5. What security measures exist for .NET Remoting in System.Runtime.Remoting?

   None. Security should be taken care of at the application level. Cryptography and other security techniques can be applied at application or server level. 

6. What is a formatter?

   A formatter is an object that is responsible for encoding and serializing data into messages on one end, and deserializing and decoding messages into data on the other end. 

7. Can you configure a .NET Remoting object via XML file?

   Yes, via machine.config and application level .config file (or web.config in ASP.NET). Application-level XML settings take precedence over machine.config.

8. Choosing between HTTP and TCP for protocols and Binary and SOAP for formatters, what are the trade-offs?

   Binary over TCP is the most effiecient, SOAP over HTTP is the most interoperable.

9. How do you define the lease of the object?

   By implementing ILease interface when writing the class code.

10. What’s SingleCall activation mode used for?

    If the server object is instantiated for responding to just one single request, the request should be made in SingleCall mode. 
    

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