Explain the difference between ARCHIVELOG mode and NOARCHIVELOG mode and the benefits and disadvantages to each.

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ARCHIVELOG mode is a mode that you can put the database in for creating a  backup of all transactions that have occurred in the database so that you can recover to any ball in time. 
NOARCHIVELOG mode is basically the absence of ARCHIVELOG mode and has the disadvantage of not being able to recover to any ball in time. NOARCHIVELOG mode does have the advantage of not having to write transactions to an archive log  and thus increases the performance of the database slightly.

 

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