Java EE 7 Application Developer — Question 34

What is true about Message-Driven Beans (MDBs)?

Answer options

• A. MDBs can participate in transactions.
• B. MDBs are invoked synchronously.
• C. Each MDBs can process messages only from a single client.
• D. MDBs retain data caches between client calls.

Correct answer: A

Explanation

The correct answer is A because Message-Driven Beans can indeed participate in transactions, allowing them to ensure consistency in message processing. Option B is incorrect as MDBs are invoked asynchronously, not synchronously. Option C is also wrong since an MDB can process messages from multiple clients, and option D is incorrect because MDBs do not retain data caches between calls.