Amdocs Oracle Database Administrator Interview Questions and Answers

Configuring RAC involves setting up shared storage, network, and database components on multiple nodes.

• Configure shared storage using ASM or NFS

• Configure network components such as VIP, SCAN, and listener

• Install Oracle Grid Infrastructure and Oracle Database software on all nodes

• Create a RAC database using DBCA or manually

• Configure load balancing and failover using services

• Use shell scripting and SQL scripting to automate tasks

• Perform regular maintenance tasks such as patchin...read more

Different types of objects in a database include tables, views, indexes, sequences, and stored procedures.

• Tables: Used to store data in rows and columns.

• Views: Virtual tables created by a query.

• Indexes: Improve the performance of queries by allowing quick access to specific rows.

• Sequences: Generate unique numbers.

• Stored Procedures: Precompiled SQL code that can be executed with parameters.

A materialized view (mview) is a database object that contains the results of a query. Datapump is a tool for moving data between Oracle databases. Oracle GoldenGate is a real-time data integration and replication tool.

• Materialized views (mviews) store the results of a query for faster access.

• Datapump is a tool used for exporting and importing data between Oracle databases.

• Oracle GoldenGate is a real-time data integration and replication tool used for moving and synchronizing...read more

Restoring a database using RMAN involves connecting to the target database, restoring the control file, and recovering the database.

• Connect to the target database using RMAN

• Restore the control file from a backup

• Restore the datafiles and tablespaces

• Recover the database to bring it to a consistent state

• Perform necessary checks and validations after restoration

You can change a column in a table using the ALTER TABLE statement in SQL.

• Use the ALTER TABLE statement followed by the MODIFY keyword to change the data type or size of a column.

• Use the ALTER TABLE statement followed by the ADD or DROP keyword to add or remove a column.

• Make sure to specify the table name, column name, and the new data type or size when making changes.