EXAMIANS
In optimistic locking, the assumption is made that conflict will occur.
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A transaction is a series of actions to be taken on the database so that either all of them are performed successfully or none of them are performed at all.
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Locks placed by the DBMS are called ________ .
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The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.
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Locks placed by command are called ________ .
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Which of the following occurs when a transaction rereads data and finds new rows that were inserted by a command transaction since the prior read?
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Two transactions that run concurrently and generate results that are consistent with the results that would have occurred if they had run separately are referred to as serializable transactions.
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What is the overall responsibility of the DBA?
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In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.
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The overall responsibility of the DBA is to facilitate the development and use of the database.
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