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Managing Multiuser Databases

Managing Multiuser Databases
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.

False
True

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Managing Multiuser Databases
The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B.

True
False

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Managing Multiuser Databases
A point of synchronization between the database and the transaction log is generally referred to as a stop point.

True
False

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Managing Multiuser Databases
The size of the lock is referred to as the lock granularity.

False
True

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Managing Multiuser Databases
Locks placed by the DBMS are called ________ .

shared locks
exclusive locks
implicit locks
explicit locks

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Managing Multiuser Databases
Which of the following disallows both dirty reads and nonrepeatable reads, but allows phantom reads?

Repeatable read
Serializable
Read committed
Read uncommitted

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