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Managing Multiuser Databases

Managing Multiuser Databases
A cursor type in which the application can only move forward through the recordset is called:

keyset.
dynamic.
forward only.
static.

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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
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.

True
False

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Managing Multiuser Databases
A durable transaction is one in which all committed changes are permanent.

False
True

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Managing Multiuser Databases
Which of the following refers to a cursor type that when the cursor is opened, a primary key value is saved for each row in the recordset; when the application accesses a row, the key is used to fetch the current values of the row?

Keyset
Static
Dynamic
Forward only

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Managing Multiuser Databases
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?

Dirty read
Nonrepeatable read
Consistent read
Phantom read

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