What does @singleton annotation do?
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What are transaction isolation levels in ejb?
What is an entity manager?
What is entity beans in ejb with example?
What is session bean in ejb?
Is microservice stateless?
What is ejb technology?
What is difference between ejb 1.1 and ejb 2.0?
What optimization could I use if the ejb container is the only point of write access to the database?
What is the procedure of ejb container to handle exceptions?
How does the server decide which beans to passivate and activate?
what are the classes you used in Beans?
Driver manager is a class/interface.
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