Irrecoverable error - Defininition - Database

Q.  Which of the following may lead to an irrecoverable error in a database system?
- Published on 25 Aug 15

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: A transaction reads a data item after it is written by an uncommitted transaction

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