Refresh Your Java - Before Java Interview
We are Agile, believe in less Documentation - Only Quick notes (Java Interview Questions) of Java/J2ee Read more....
Transactions Exhibit four main Characterstics : Automicity , Consistency, Isolation, and Durability .
Automicity
Automicity implies that a
Transaction will be treated as a single unit of work, as we
discussed above ,
a Transaction could have several steps
, all these should be considered as Single unit and the
Transaction
would be either successful
(COMITT) or failed (ROLLBACK), should not have any
partial comitts. When each step of
the transaction is
completed successfully then that Transaction would be considered
as Success (COMITT),
if any single step failure could
mark entire Transaction as Failed (ROLLBACK).
Consistency
Consistency guarantees
that the Transaction will leave the system and data in consistent
state.We say the data is in
consistent state when it
adheres to the Constaints , or Rules, of the Database.
Isolation
Isolation
guarantees , the data that a transaction accesses will not be
affected by any other changes made by other
Transactions
until the First transaction completes.
Durability
The Durabilty property
specifies that when a transaction is comitted , any changes to
data that it made should be persisted
to a permanent
storage.
This Portal is intended to put all Java/J2ee related topics at one single place for quick referance, not only Technical , but also the Project Management Related thing such as Development Process methodoogies build process, unit testing etc.,
This Portal has More than 500 Java Interview Questions (also could be Considered as Quick Notes) very neatly separated topic by topic with simple diagrams which makes you easily understandable. Importantly these are from our Realtime expericance.