Which of the following below are valid isolation levels in J2EE?

Options
- TRANSACTION_READ_UNCOMMITTED:
- Both a and c
- TRANSACTION_SERIALIZABLE
- TRANSACTION_SERIALIZABLE_COMMIT

CORRECT ANSWER : Both a and c

Discussion Board
Isolation levels

Most of the questions are really nice

Neeraj Jha 10-14-2020 05:32 AM

Isolation levels

Transactions ensures the full completion of the statements that they enclose but they isolate the data that is modified by the statements. The level of isolation is described by the degree to which the data being updated and being visible to other transactions.

Transaction can be more better in performance if the transaction allows other programs to read uncommitted data in this case the other programs don't have to wait for the transaction to be over. But if the transaction rolls back, another program might read the wrong data.
These beans use the default isolation level of the DBMS, which is:
1. READ_COMMITTED
2. READ_UNCOMMITTED


Rohit Sharma 08-14-2014 07:31 PM

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