Question 1: Which is better to use for backup, Oracle's RMAN or the Unix Operating System shell commands such as the cp or dd commands? Please explain the reasons why you would choose use one over the other.
Question 2: Alapati says, No backups no recoveries. What are the implications of this statement? Explain what it means to you. Also, describe the important files that you need to backup consistently in Oracle Database 11g to ensure a quick recovery. Explain what a 'hot' back up is as compared to a 'cold' backup.