20 Oracle 19c Interview Questions and Answers

Oracle 19c is the latest release of the Oracle database. This version includes new features and improvements that make it an attractive option for businesses and organizations. If you’re applying for a position that involves Oracle 19c, you should be prepared to answer questions about the new features and how you would use them. In this article, we review some common Oracle 19c interview questions and provide guidance on how to answer them.

Oracle 19c Interview Questions and Answers

Here are 20 commonly asked Oracle 19c interview questions and answers to prepare you for your interview:

1. What is Oracle 19c?

Oracle 19c is a relational database management system (RDBMS) from Oracle Corporation. It is the long-term support release (LTSR) of the Oracle Database 12c Release 2 (12.2) line. Oracle 19c is available on-premises and in the cloud.

2. Are there any specific new features that can be used in the context of a database upgrade to Oracle 19c?

Yes, there are a few new features that can be used when upgrading to Oracle 19c. One is the new Oracle Upgrade Assistant, which can help automate the process of upgrading your database. Another is the new Oracle Database Migration Assistant, which can help with migrating data to Oracle 19c. Finally, the new Oracle SQL Developer Migration Workbench can help with migrating database objects and data.

3. Is there anything special about upgrading from Oracle 12c to 19c as opposed to other versions?

Yes, there are a few things to keep in mind when upgrading to Oracle 19c. First, the Oracle 19c database is only compatible with Oracle Linux 7.3 or higher. Second, the Oracle 19c database is only compatible with the Oracle 19c client. Finally, when upgrading from Oracle 12c to 19c, you will need to export your data from the 12c database, then import it into the 19c database.

4. Is it possible to upgrade an existing 11gR2 or 12c non-container database (CDB) to Oracle 19c? If yes, how?

Yes, it is possible to upgrade an existing 11gR2 or 12c non-container database (CDB) to Oracle 19c. You can do this by using the Oracle Database Upgrade Assistant (DBUA).

5. In what situations would you use a container database architecture for your production databases?

Container database architectures are becoming increasingly popular for production databases, as they offer a number of advantages. One key advantage is that they allow for much easier management of multiple databases, as all of the databases can be managed from a single console. This can save a lot of time and effort, particularly for larger organizations with many databases. Additionally, container databases can offer better performance and scalability than traditional database architectures.

6. What is a pluggable database?

A pluggable database is a database that is contained within another database, known as the container database. The pluggable database shares certain resources with the container database, but it can also be configured and administered independently. This allows for greater flexibility and scalability when managing multiple databases.

7. Does Oracle 19c support using multiple PDBs on the same server?

Yes, Oracle 19c does support using multiple PDBs on the same server. This allows for greater flexibility and scalability when deploying Oracle databases.

8. What are some key features of Autonomous Database Cloud Service?

Some key features of Autonomous Database Cloud Service include:

– The ability to automatically provision and manage Oracle databases in the cloud
– The ability to elastically scale compute and storage resources as needed
– The ability to patch and upgrade databases automatically
– The ability to monitor and manage databases using the Oracle Cloud Infrastructure Console

9. Can you explain what SQL Plan Management is and why we need it?

SQL Plan Management is a feature in Oracle 19c that allows the database to automatically manage SQL execution plans. This can help improve performance by ensuring that the optimizer always has access to the most up-to-date execution plans. SQL Plan Management can also help to prevent plan regressions by automatically reverting to a previous plan if a new one is found to be sub-optimal.

10. What are the main benefits provided by Oracle Machine Learning?

Oracle Machine Learning provides a number of benefits, including the ability to automatically generate models from data, the ability to deploy models in a production environment, and the ability to monitor and manage models. Additionally, Oracle Machine Learning provides a number of tools that make it easier to work with data, including data preparation, feature selection, and model evaluation.

11. What’s the difference between Oracle Advanced Security Option and Oracle Data Redaction?

Oracle Advanced Security Option provides a comprehensive set of tools for securing data in transit and at rest, including encryption, data masking, and access control. Oracle Data Redaction, on the other hand, is a feature that allows you to selectively redact sensitive data from your database, making it unreadable to unauthorized users.

12. How do you ensure data security when storing sensitive information in a database like Oracle 19c?

When storing sensitive information in a database like Oracle 19c, you need to ensure that the data is encrypted. You can do this by using a tool like Oracle Advanced Security. This will encrypt the data both at rest and in transit, making it much more difficult for unauthorized individuals to access it.

13. What is the best way to secure passwords stored in Oracle 19c?

The best way to secure passwords stored in Oracle 19c is to use the Oracle Password Vault. The Password Vault is a secure, centralized repository for storing and managing passwords. It provides a single point of control for managing passwords, and it ensures that all passwords are stored in a secure, encrypted format.

14. How can you prevent unauthorized users from accessing sensitive information in Oracle 19c?

You can prevent unauthorized users from accessing sensitive information in Oracle 19c by using the Data Redaction feature. This feature allows you to specify which columns of data should be redacted, and how the data should be redacted. You can also specify which users should have access to the redacted data.

15. What is the importance of the Oracle wallet feature?

The Oracle wallet feature is important because it allows for the secure storage of sensitive information, such as passwords, within the database. This means that the information is less likely to be compromised if the database is breached.

16. What is Oracle Real Application Clusters? Why should we use it?

Oracle Real Application Clusters (RAC) is a software feature that allows Oracle databases to be deployed on a cluster of servers. This provides high availability and scalability for Oracle databases. RAC can be used to improve the performance of Oracle databases, and it can also be used to provide failover protection in the event of a server failure.

17. What are the advantages of using Oracle Enterprise Manager?

Oracle Enterprise Manager provides a comprehensive and centralized solution for managing Oracle databases, middleware, and applications. It offers a complete set of tools for managing and monitoring all aspects of your IT infrastructure, including:

– Provisioning and patching
– Configuration management
– Performance monitoring
– Capacity planning
– Security and compliance
– Backup and recovery

Oracle Enterprise Manager also provides a self-service portal for users, so they can request and provision new resources, as well as monitor the status of their existing resources.

18. Do you think there will ever be a situation where a business won’t need a data warehouse?

I don’t think so. Data warehouses will always be necessary to store and analyze large amounts of data.

19. What’s your opinion on Oracle Exadata? When should it be used?

Oracle Exadata is a powerful tool that can be used to improve the performance of Oracle databases. It should be used in situations where the database is expected to experience high demand or where the database is particularly large.

20. What are the differences between Oracle Exadata and Amazon Web Services RDS?

Oracle Exadata is a cloud-based platform that provides customers with a complete Oracle database solution, while Amazon Web Services RDS is a cloud-based platform that provides customers with a relational database service. Oracle Exadata includes all of the software and hardware necessary to run an Oracle database, while Amazon Web Services RDS only provides the software necessary to run a relational database. Oracle Exadata also provides customers with a complete set of tools for managing and monitoring their Oracle database, while Amazon Web Services RDS only provides a limited set of tools for managing and monitoring their relational database.