Microsoft
70-513 · Question #165
A Windows Communication Foundation (WCF) service has a callback contract. You are developing a client application that will call this service. You must ensure that the client application can…
The correct answer is C. On the client, create a proxy derived from DuplexClientBase(Of TChannel). See the full explanation below for the reasoning.
Question
A Windows Communication Foundation (WCF) service has a callback contract. You are developing a client application that will call this service. You must ensure that the client application can interact with the WCF service. What should you do?
Options
- AOn the OperationContractAttribute, set the AsyncPattern property value to True.
- BOn the OperationContractAttribute, set the ReplyAction property value to the endpoint
- COn the client, create a proxy derived from DuplexClientBase(Of TChannel).
- DOn the client, use GetCallbackChannel (Of T).
How the community answered
(48 responses)- A4% (2)
- B8% (4)
- C73% (35)
- D15% (7)
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