Managing Multiuser Databases – True or False

11. 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.

A. True
B. False

Correct Answer:  A. True
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12. The lost update problem is when User A reads data that have been processed by a portion of a transaction from User B.

A. True
B. False

Correct Answer:  B. False
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13. The transaction log contains a copy of every database record (or page) after it has changed. These records are called before images.

A. True
B. False

Correct Answer:  B. False
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14. Database administration refers to a function that applies to the entire organization.

A. True
B. False

Correct Answer:  B. False
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15. Locks placed by command are implicit locks.

A. True
B. False

Correct Answer:  B. False
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