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Locks placed by command are called ________ .

implicit locks
explicit locks
exclusive locks
shared locks

Correct Answer: explicit locks

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More Questions from Managing Multiuser Databases

Which of the following occurs when a transaction rereads data it has previously read and finds modification or deletions caused by a committed transaction?
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.
A point of synchronization between the database and the transaction log is generally referred to as a stop point.
A phantom read occurs when a transaction rereads data it has previously read and finds modifications or deletions caused by a committed transaction.
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.
The overall responsibility of the DBA is to facilitate the development and use of the database.
When two transactions are being processed against the database at the same time they are termed concurrent transactions.
The size of the lock is referred to as the lock granularity.
An ACID transaction is one that is atomic, consistent isolated, and durable.
A durable transaction is one in which all committed changes are permanent.

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