What concurrent processing problem occurs when a transaction reads a changed record that has not been committed to the database?
A) Nonrepeatable reads
B) Phantom reads
C) Dirty reads
D) Serialized reads
E) Unlocked reads

Question

Quizplus · Accepted Answer

When a transaction reads a changed record that has not been committed to the database, it is known as a dirty read. This is a potential problem in concurrent processing as it can lead to inconsistent data and incorrect results. Nonrepeatable reads and phantom reads are also concurrent processing problems, but they occur in different scenarios. Serialized reads and unlocked reads are not commonly recognized concurrent processing problems.

What Concurrent Processing Problem Occurs When a Transaction Reads a Changed