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What is the mean of "dirty read" in database?

Answer : This kind of JDBC interview question is asked on 2 to 4 years experience Java programmer, they are expected to familiar with database transaction and isolation level etc. As the name it self convey the meaning of dirty read “read the value which may or may not be correct”. in database when one transaction is executing and changing some field value same time some another transaction comes and read the change field value before first transaction commit or rollback the value ,which cause invalid value for that field, this scenario is known as dirty read.

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