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Managing Multiuser Databases

Managing Multiuser Databases
In optimistic locking, the assumption is made that conflict will occur.

False
True

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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.

False
True

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Managing Multiuser Databases
The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.

True
False

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

Read uncommitted
Read committed
Serializable
Repeatable read

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Managing Multiuser Databases
A transaction in which either all of the database actions occur or none of them do is called:

isolated.
consistent.
durable.
atomic.

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Managing Multiuser Databases
Which of the following locks the item from access of any type?

Exclusive lock
Explicit lock
Shared lock
Implicit lock

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