Oracle Disaster Recovery Interview Questions | Hot, Cold Backup - 1

Question: 1

What is catalog command?

Catalog command is used to register different types of information with RMAN’s repository.

Question: 2

What are time based and change based recoveries?

Time based and change based recoveries are forms of incomplete recovery.

These are used when one knows the time or system change number up to which one wants to recover the database.

Question: 3

What is a backup set?

Backup set is a logical grouping of backup files that are created when you issue an RMAN backup command.

It is RMAN’s name for a collection of files associated with a backup. A backup set is composed of one or more backup pieces.

Question: 4

Which is more efficient – incremental backups using RMAN or incremental export?

RMAN incremental backup is more efficient than the incremental export.

Question: 5

How does RMAN improve performance of backup?

RMAN uses multiple channels and does not take backup of free blocks.

This is the reason why performance of RMAN backup is better.