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Transactions question- HF page 497

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In page 497, sharpen your pencil - the first question is : Of the six transaction attributes which one / ones must not be used by a bean that calls getRollbackOnly() or setRollbackOnly() -
The answer given is : Never.
I think the the correct answers are : Never, NotSupported and supports.
I have seen runtime exceptions when setRollbackOnly() is called without a transaction context.
Please clarify.
Consider Paul's rocket mass heater.
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