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What does @Transactional(propagation=Propagation.REQUIRES_NEW) do?
It always creates a new transaction, suspending any existing one
How many and what cache levels are there in Hibernate?
• 1st level Cache - can’t be turned off, caches entities in persistence context
• 2nd level Cache - should be explicitly turned on and configured, caches entities among a several entity managers
• 3rd level Cache - caches the results of queries and parameters.
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