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QUESTION NO: 1
You are creating a Windows Communication Foundation (WCF) service that is implemented as
follows.
(Line numbers are included for reference only.)
01 [ServiceContract]02 [ServiceBehavior(includeExceptionDetailsInFaults = true)03 public class
OrderService04 {05 [Operation Contract]06 public void Submit Order(Order anOrder)
07
08
09
10
{
try{ ...
11
12
13
14
}catch(DivideByZeroExcepton ex){
15
16
17 }
}
}
You need to ensure that the stack trace details of the exception are not included in the error information
sent to the client.
What should you do?
A. Replace line 14 with the following line. throw:
B. Replace line 14 with the following line
throw new FaultException(anOrder, ex.ToString());
C. After line 05, add the following line.
[FaultContract(typeof(FaultException))]
Replace line 14 with the following line
throw ex;
D. Alter line 05, add the following line
[FaultContract(typeof(FaultException))]
Replace line 14 with the following line.
throw new FaultException(anOrder, "Divide by zero exception");
Answer: D

QUESTION NO: 2
You are creating a windows Communication Foundation (WCF) service. You do not want to expose
the internal implementation at the service layer. You need to expose the following class as a service
named Arithmetic with an operation named Sum public class Calculator
{ public int Add(int x, nty){}
}
Which code segment should you use?
A. [ServiceContract(Namespace="Arithmetic")]public class Calculator{
[Operation Contract(Action="Sum")]
public int Add(int x, int y)
{}
}
B. [ServiceContract(ConfigurationName="Arithmetic")]public class Calculator{
[Operation Contract(Action="Sum")]
public int Add(int x, int y)
{}
}
C. [ServiceContract(Name="Arithmetic")]public class Calculator{
[OperationContract(Name="Sum")]
public int Add(int x, lnt y)
{}
}
D. [ServiceContract(Name="Arithmetic")]public class Calculator{
[OperationContract(ReplyAction="Sum")]
public int Add(int x, int y)
{}
}
Answer: C

QUESTION NO: 3
You are developing a data contract for a Windows Communication Foundation (WCF) service. The
data in the data contract must participate in round trips. Strict schema validity is not required. You need
to ensure that the contract is forward-compatible and allows new data members to be added to it.
Which interface should you implement in the data contract class?
A. lCommunicationObject
B. lExtension 
C. lExtensibleObject 
D. lExtensibleDataObject
Answer: D

QUESTION NO: 4
A Windows Communication Foundation (WCF) application uses a data contract that has several data
members. You need the application to throw a SerializationException if any of the data members are
not present when a serialized instance of the data contract is deserialized.
What should you do?
A. Add the Known Type attribute to the data contract. Set a default value in each of the data member
declarations.
B. Add the Known Type attribute to the data contract. Set the Order property of each data member to
unique integer value.
C. Set the Emit Default Value property of each data member to false.
D. Set the lsRequired property of each data member to true.
Answer: D

QUESTION NO: 5
A Windows Communication Foundation (WCF) application uses the following data contract
[DataContract]public class
Person{
[DataMember]
public string firstName;
[DataMember]
public string lastName;
[DataMember]
public int age;
[DataMember]
public int ID;
}
You need to ensure that the following XML segment is generated when the data contract is serialized.
 999999999 

Which code segment should you use?
A. [DataMember|public string firstName;[DataMember]public string
lastName;[DataMember(EmitDefaultValue=true)]public int age =
0;[DataMember(EmitDefaultvalue=true")]public int ID = 999999999;
B. [DataMember(EmitDefaultvalue false)]public string
firstName = null;[DataMember(EmitDefaultValue =
false)]public string lastName =
null;[DataMember(EmitDefaultValue = true)]public int
age = -1;[DataMember(EmitDefaultValue false)]public
int ID = 999999999;
C. [DataMember(EmitDefaultValue=true)]public string
firstName;[DataMember(EmitDefaultValue=true)]pub
lic string
IastName;[DataMember(EmitDefaultValue=false)]pub
lic int age =
-1;[DataMember(EmitDefaultValue=false)]public int
ID = 999999999
D. [DataMember]public string firstName = null;[DataMember]public string lastName =
null;[DataMember(EmitDefaultValue=false)]public int age =
0;[DataMember(EmitDefaultValue=false)]public int ID = 999999999;
Answer: D