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Question 73   What are leasetime, sponsorshiptime, renewoncalltime and leasemanagerpolltime

How does garbage collector work on a remoting environment, because objects are created on a remote system which is outside the memory of the client system? or how will the server detect that an object is no longer used by a client system. in order to manage garbage collection in a remoting environment .net uses mechanisms like leasetime, sponsorshiptime, renewoncalltime and leasemanagerpolltime. this is also known as leasing distributed garbage collector (ldgc)

leasetime – leasetime property is set to define the time an object will be alive on a server. the default value will be 5 minutes, which means a remoting object created on the server will be alive for five minutes. we can increase or decrease this value based on requirement.

renewoncalltime – this property define the time an object will be alive after a call made to the server. the default value will be two minutes

sponsorshiptime – when the life time of an object becomes zero, it waits for a sponsor to become available. this is known as sponsorshiptime and the default value will be two minutes.

leasemanagerpolltime – the time a sponsor has to return a lease time extension is known as leasemanagerpolltime



Question 74   Which config file has all the supported channels/protocol

Machine.config




Question 75   What is marshalling and what are different kinds of marshalling

The process of converting an object to a serialized string to transport them across the network is known as marshalling. the process of converting a serialized string to an object is known as unmarshaling. there are two types of marshalling, marshal by value and marshal by reference

marshal by value – on the server a copy of the object will be created which will then passed to the client

marshal by reference – client creates a proxy of the object which will be used to access the server object



Question 76   What is objref object in remoting

The process of converting an object to a serialized string to transport them across the network is known as marshalling. there are two types of marshalling, marshal by value and marshal by reference. objref is used to create marshal by reference



Question 77   What is a web service

A web service is a service which is available over the internet providing business logic or data which can be consumed by various client applications. it uses xml for communication between the systems. a web service can be available over various protocol like http, tcp etc. they are platform independent and language independent



Question 78   What is uddi

Uddi stands for universal description, discovery and integration

it is a universal directory where web services can be listed so that they can be searched and used by other business/applications. it is a categorized store of web services.




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