Data and Database Administration
Which of the following is the preferred way to recover a database after a transaction in progress terminates abnormally?

Switch to duplicate database
Reprocess transactions
Rollforward
Rollback

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Data and Database Administration
Concurrency control is important for which of the following reasons?

To ensure data integrity when updates occur to the database in a single-user environment
To ensure data integrity when updates occur to the database in a multiuser environment
To ensure data integrity while reading data occurs to the database in a multiuser environment
To ensure data integrity while reading data occurs to the database in a single-user environment

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