Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) DBMS Transaction

Which of the following scenario may lead to an irrecoverable error in a database system? 

1
A transaction writes a data item after it is read by an uncommitted transaction 
2
A transaction reads a data item after it is read by an uncommitted transaction 
3
A transaction reads a data item after it is written by a committed transactions
4
A transaction reads a data item after it is written by an uncommitted transaction.
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