The isolationLevel property in the Copy activity source section describes the transaction locking behavior for the SQL source. Which of the following are possible values for isolationLevel? (Select all that are applicable)

Answer options:

A.ReadCommitted
B.ReadUncommitted
C.RepeatableRead
D.Serializable
E.Repeatable Write
F.Non-Serializable
G.Write committed
H.
Write uncommitted

Correct Answers: A, B, C and D 
isolationLevel describes the transaction locking behavior for the SQL source. The allowedvalues for this property are: ReadUncommitted, ReadCommitted, , RepeatableRead,Snapshot and Serializable. If not mentioned, thedefault isolation level of the database is used.
Option A is correct. Read committed is one of the allowed values for isolationLevel.
Option B is correct. Read uncommitted is one of the allowed values for isolationLevel.
Option C is correct. Repeatable Read is one of the allowed values for isolationLevel.
Option D is correct. Serializable is one of the allowed values for isolationLevel.
Option E is incorrect. Repeatable Write is not the allowed value for isolationLevel.
Option F is incorrect. Non-Serializable is not the allowed value for isolationLevel.
Option G is incorrect. Write Committed is not the allowed value for isolationLevel.
Option H is incorrect. Write uncommitted is not the allowed value for isolationLevel.
Reference: 
To know more about Copying and transforming data in Azure SQL Database, please visit the below-given link: 

https://docs.microsoft.com/en-us/azure/data-factory/connector-azure-sql-database#error-row-handling