Senior Oracle Database Administrator Interview Questions and Answers

Two node RAC with two node DataGuard is a high availability solution for Oracle databases.

• Two node RAC provides high availability by allowing multiple instances to access a single database simultaneously.

• Two node DataGuard provides disaster recovery by maintaining a standby database that can take over in case of a primary database failure.

• Combining the two creates a highly available and disaster-resistant solution for Oracle databases.

• In this setup, each node in the RAC has a...read more

Applying a database patch involves preparation, execution, and validation steps to ensure a smooth upgrade.

• 1. Review the patch documentation for prerequisites and compatibility.

• 2. Backup the database and configuration files before applying the patch.

• 3. Use the OPatch utility to apply the patch: e.g., 'opatch apply'.

• 4. Run post-patch scripts if required, as specified in the patch notes.

• 5. Validate the patch application by checking the database version and logs.

DataGuard is an Oracle feature that provides high availability and disaster recovery solutions for databases.

• DataGuard creates and maintains a standby database that can take over in case of a primary database failure.

• It uses redo apply technology to keep the standby database synchronized with the primary database.

• DataGuard can be configured in different modes such as maximum availability, maximum performance, and maximum protection.

• It can also be used for rolling upgrades and...read more

Experienced in RMAN for backup, recovery, and database maintenance in Oracle environments.

• Proficient in RMAN commands for full and incremental backups.

• Implemented RMAN scripts for automated backup processes.

• Utilized RMAN for point-in-time recovery scenarios.

• Monitored backup performance and optimized RMAN configurations.

• Conducted RMAN catalog management for efficient backup tracking.