Wipro Oracle Database Administrator Interview Questions, Process, and Tips

To take RMAN backup quickly, use parallelism, compression, and backup sets.

• Use multiple channels to take backup in parallel

• Enable compression to reduce backup size

• Use backup sets to split backup into smaller pieces

• Use incremental backup to reduce backup time

• Use fast recovery area to store backups for quick recovery

To check long running in database, use SQL queries to identify and troubleshoot slow queries.

• Use Oracle Enterprise Manager to monitor database performance

• Check the V$SESSION_LONGOPS view to identify long running operations

• Use SQL trace to identify slow queries

• Check the alert log for any errors or warnings

• Use AWR reports to analyze database performance over time

RMAN backup and recovery is a crucial aspect of Oracle Database Administration.

• RMAN (Recovery Manager) is a tool used for backup and recovery of Oracle databases.

• It provides features like incremental backups, block-level backups, and backup compression.

• RMAN can also be used for restoring and recovering databases in case of failures.

• It is important to regularly test backups and recovery procedures to ensure they are wor...read more

Upgrading to Oracle Database 19c and related challenges

• Ensure compatibility of existing applications with 19c

• Perform pre-upgrade tasks such as backup and patching

• Upgrade the database using DBUA or manual methods

• Address challenges such as deprecated features and changes in behavior

• Configure Data Guard for high availability and disaster recovery

• Rollback an OPatch using the -rollback option

• Use RMAN duplication to create a