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Managing Multiuser Databases

Managing Multiuser Databases
Resource locking is a process to prevent multiple applications from obtaining copies of the same record when the record is about to be changed.

False
True

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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.

True
False

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

True
False

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

implicit locks
exclusive locks
explicit locks
shared locks

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Managing Multiuser Databases
An exclusive lock locks the item from change but not from read.

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
Forward only
Dynamic
Static

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