Oracle Database Administration from Zero to Hero - Performing Recovery Part II - Switching Data Files and Performing PIT

The lecture covers Point in Time Recovery (PITR) in Oracle databases, explaining its necessity, levels, and comparison with Flashback technology. It discusses the drawbacks of DBPITR, the importance of reset logs and database incarnation, and methods to obtain the DB ID. The lecture concludes with practical steps for implementing DBPITR and modified procedures for recovery.

What is the primary purpose of Point in Time Recovery (PITR)?

• To return the database to a previous state

• To create a new database instance

• To enhance database performance

• To upgrade the database to a new version

Which level of PITR is referred to as DBPITR?

• Schema level

• Tablespace level

• Database level

• Table level

What is a major drawback of DBPITR?

• The entire database is unavailable during recovery

• It requires no backups

• It can be performed without RMAN

• It does not require archive log mode

What happens to the log sequence number when you open the database with the reset logs option?

• It remains unchanged

• It is set to zero

• It is reset to one

• It is doubled

What term does Oracle use to describe the event of opening a database with the reset logs option?

• Reinitialization

• Incarnation

• Resurrection

• Reincarnation

Why is knowing the database incarnation important during recovery?

• It helps in upgrading the database

• It allows for database cloning

• It ensures the archived redo logs match the database

• It speeds up the recovery process

What is one indirect method to obtain the DB ID of a database?

• Looking into RMAN log files

• Checking the database version

• Querying the database schema

• Using a direct RMAN command

What is the first step in implementing DBPITR?

• Reset the database logs

• Upgrade the database

• Determine the required recovery point

• Open the database in read-only mode

What is the purpose of opening the database in read-only mode during the modified DBPITR procedure?

• To perform a database upgrade

• To enhance database performance

• To verify the recovered data

• To reset the database logs

What happens to the current control file during the modified DBPITR procedure?

• It is backed up

• It is archived

• It is overwritten

• It is deleted