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Managing Multiuser Databases

Managing Multiuser Databases
When one transaction reads a changed record that has not been committed to the database a filthy read occurs.

False
True

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Managing Multiuser Databases
Locks placed by command are implicit locks.

True
False

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Managing Multiuser Databases
An ACID transaction is one that is atomic, consistent isolated, and durable.

True
False

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Managing Multiuser Databases
Locks placed by command are called ________ .

implicit locks
explicit locks
exclusive locks
shared locks

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Managing Multiuser Databases
In this instance, dirty reads are disallowed, while nonrepeatable reads and phantom reads are allowed.

Read committed
Repeatable read
Read uncommitted
Serializable

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Managing Multiuser Databases
Locks placed by the DBMS are explicit locks.

False
True

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