You are developing a WCF service application.The application must meet the following requirements:
Operations must have 30 second timeouts.
The service must have a transaction scope.
Transactions must flow from the client to the server.
You need to write a transactional service contract and implementation class to meet the
requirements.
You have the following code:
Which code segments should you include in Target 1, Target 2, Target 3 and Target 4 to
complete the code? {To answer, drag the appropriate code segments to the correct targets in the
answer area. Each code segment may be used once, more than once, or not at all. You may need
to drag the split bar between panes or scroll to view content.)
Select and Place:
Answer: 
See MSDN article ‘Transactions in WCF Services’ :https://msdn.microsoft.com/en-us/library/ff384250.aspx
[serviceContract]
transactionFlowOption.Mandatory
transactionTimeout=”00:00:30″
transactionScopeRequired=true