INTERVIEW QUESTIONS J2EE JDBC DETAILS

Question: Difference between local and global transaction?

Answer: A transaction is atomic unit of Work.The tasks which are made into the transaction act as a unit which can be executed successfully all,or if at least one task fails to its promise ,then the effect of all the tasks are to be rollbacked.Thus transaction is committed or rolled backed.

Transactions can be divided into two categories.

1.Local Transactions:These transactions are confined to objects which reside inside one particular JVM.Local transactions in java can be implemented using the JTA api.

2.Global Transactions:These transactions may encapsulate objects which are distributed on various JVM's.Global transactions are implemented throught TWO-PHASE-COMMIT design implementation.

A transaction is atomic unit of Work.The tasks which are made into the transaction act as a unit which can be executed successfully all,or if at least one task fails to its promise ,then the effect of all the tasks are to be rollbacked.Thus transaction is committed or rolled backed.

Transactions can be divided into two categories.

1.Local Transactions:These transactions are confined to objects which reside inside one particular JVM.Local transactions in java can be implemented using the JTA api.

2.Global Transactions:These transactions may encapsulate objects which are distributed on various JVM's.Global transactions are implemented throught TWO-PHASE-COMMIT design implementation. Source: CoolInterview.com

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