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Managing Multiuser Databases

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
The goal of database security is to ensure that only authorized users can perform authorized activities at authorized times.

False
True

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Managing Multiuser Databases
The size of a lock is referred to as lock sizing.

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.

False
True

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Managing Multiuser Databases
Database administration refers to a function that applies to the entire organization.

True
False

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Managing Multiuser Databases
Which of the following locks the item from change but not from read?

Shared lock
Exclusive lock
Implicit lock
Explicit lock

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