Cognizant Senior Oracle Database Administrator Interview Questions and Answers

Oracle Block Change is a feature that tracks and records changes made to database blocks.

• Oracle Block Change is used for efficient data replication and synchronization.

• It helps in identifying and transferring only the changed data blocks instead of the entire database.

• Oracle GoldenGate utilizes Oracle Block Change technology for real-time data integration.

• Block Change Tracking (BCT) is a feature in Oracle Database that...read more

To redirect users to the 2nd node in a RAC database, you can use services and connection load balancing.

• Create a service for the 2nd node in the RAC database.

• Configure connection load balancing to distribute connections evenly between the nodes.

• Update the connection string in the application to point to the service for the 2nd node.

• Test the connection to ensure users are redirected to the 2nd node.

DBA stands for Database Administrator. The architecture of DBA involves managing and maintaining databases to ensure data integrity and security.

• DBA is responsible for installing, configuring, and upgrading database software.

• They monitor database performance and troubleshoot issues.

• DBA designs and implements backup and recovery strategies to prevent data loss.

• They also manage user access and security permissions within...read more

Maintaining the database involves regular monitoring, performance tuning, applying patches, and ensuring backups are taken regularly.

• Regularly monitor database performance and usage

• Perform routine maintenance tasks such as applying patches and updates

• Take regular backups to ensure data integrity and disaster recovery

• Implement security measures to protect the database from unauthorized access

• Optimize database performanc

I joined inm because of the company's reputation for innovation and growth in the tech industry.

• Attracted to company's reputation for innovation

• Excited about opportunities for growth in tech industry

• Impressed by company culture and values

Database architecture refers to the design and structure of a database system.

• Database architecture includes the organization of data, storage, retrieval, and security mechanisms.

• It involves defining the relationships between data elements and how they are stored and accessed.

• Examples of database architectures include hierarchical, network, relational, and object-oriented.

• Database architecture also includes the choice ...read more

Delete removes rows one by one, while truncate removes all rows at once.

• Delete is a DML command, while truncate is a DDL command.

• Delete can be rolled back, while truncate cannot be rolled back.

• Delete fires triggers, while truncate does not fire triggers.

• Delete is slower as it logs individual row deletions, while truncate is faster as it logs the deallocation of the data pages.

• Example: DELETE FROM table_name WHERE condi

SQL architecture refers to the structure and components of a SQL database system.

• SQL architecture includes components like storage engine, query processor, and buffer manager.

• The storage engine manages data storage and retrieval, while the query processor processes SQL queries.

• The buffer manager handles caching and memory management to optimize performance.

• Examples of SQL architectures include MySQL, Oracle, and SQL Se

I am impressed by the company's innovative technology solutions and strong reputation in the industry.

• The company has a track record of developing cutting-edge technology solutions.

• I admire the company's commitment to excellence and continuous improvement.

• The company's reputation for providing top-notch training and development opportunities is appealing to me.

I expect a competitive salary based on my experience, skills, and the market rate for Oracle Database Administrators.

• Research the average salary range for Oracle Database Administrators in your area

• Consider your level of experience and skills when determining your salary expectations

• Be prepared to negotiate based on the specific responsibilities and benefits offered by the employer

Experienced Oracle DBA with 5+ years of hands-on experience in managing databases, optimizing performance, and ensuring data security.

• 5+ years of experience as an Oracle DBA

• Proficient in database management, performance optimization, and data security

• Skilled in troubleshooting and resolving database issues

• Strong knowledge of Oracle database architecture and SQL

• Certified Oracle Database Administrator (OCA/OCP)