Define Transaction Isolation in EJB
By Ramakrishna on Aug 24, 2008 in Ejb Interview Questions
Q) What are transaction isolation levels in EJB?
A)
1. Transaction_read_uncommitted- Allows a method to read uncommitted data from a DB(fast but not wise).
2. Transaction_read_committed- Guarantees that the data you are getting has been committed.
3. Transaction_repeatable_read – Guarantees that all reads of the database will be the same during the transaction (good for read and update operations).
4. Transaction_serializable- All the transactions for resource are performed serial.
