Answer Posted / patil madhav
Atomicity:-
All changes to data are performed as if they are a
single operation. That is, all the changes are performed, or
none of them are.
For example, in an application that transfers funds from
one account to another, the atomicity property ensures that,
if a debit is made successfully from one account, the
corresponding credit is made to the other account.
Consistency:-
Data is in a consistent state when a transaction starts
and when it ends.
For example, in an application that transfers funds from
one account to another, the consistency property ensures
that the total value of funds in both the accounts is the
same at the start and end of each transaction.
Isolation:-
The intermediate state of a transaction is invisible to
other transactions. As a result, transactions that run
concurrently appear to be serialized.
For example, in an application that transfers funds from
one account to another, the isolation property ensures that
another transaction sees the transferred funds in one
account or the other, but not in both, nor in neither.
Durability:-
After a transaction successfully completes, changes to
data persist and are not undone, even in the event of a
system failure.
For example, in an application that transfers funds from
one account to another, the durability property ensures that
the changes made to each account will not be reversed.
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