A dirty read occurs when a transaction reads data that has been modified by another transaction but not yet committed.Question 14AnswerTrueFalse

The statement is true.

Explanation:

A dirty read is a phenomenon in database management systems that occurs when a transaction reads data that has been modified by another transaction that has not yet committed. This means that the reading transaction may retrieve data that could change if the other transaction rolls back. This situation can lead to inconsistencies, as the reading transaction may be working with data that is in an intermediate state and does not reflect the actual committed data.

To avoid dirty reads, many database systems implement isolation levels, such as Read Committed, which ensures that a transaction can only read data that has been committed by other transactions. This helps maintain data integrity and consistency, essential components in transaction processing systems.

In summary, the occurrence of a dirty read can have significant implications for the reliability of transaction outcomes, and knowing when it happens is critical for creating robust database applications.