ACID transaction in DBMS

Question

What do you understand by the term ACID transaction in DBMS? Describe briefly?

Answer 1

An ACID transaction is one which is durable, isolated, consistent, and atomic. Durable states that database alters are permanent. Consistency can signify either statement level or transaction level consistency. through transaction level consistency, a transaction might not see its own alters.

There are four transaction isolation stages which are as follows:

(a) Read committed.
(b) Read uncommitted.
(c) Repeatable read. 
(d) Serialization.

Atomic means it is functioned as a unit.