a) Give a definition of a database transaction.


b) Describe Transaction Recovery and Transaction Atomicity and explain their importance in the processing of database transactions.
c) The terms Authorisation and Authentication are associated with techniques that maintain database security and integrity.

Explain the difference between these terms and outline the basic techniques that they use.
d) Explain what is meant by Auditing in a DBMS, discuss why it is important and outline a strategy or a technique that is used to carry it out.

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