MCQOPTIONS
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MCQOPTIONS
| 1. |
Which of the following may lead to an irrecoverable error in a database system? |
| A. | A transaction reads a data item after it is written by an uncommitted transaction |
| B. | A transaction reads a data item after it is written by a committed transaction |
| C. | A transaction reads a data item after it is read by an uncommitted transaction |
| D. | A transaction writes a data item after it is read by an uncommitted transaction |
| Answer» B. A transaction reads a data item after it is written by a committed transaction | |