20 Oracle Application Express Interview Questions and Answers

Oracle Application Express (APEX) is a web-based development platform that enables you to build scalable, secure enterprise applications. If you are applying for a position that involves Oracle APEX, you can expect to be asked questions about your experience and knowledge of the platform. In this article, we review some of the most common Oracle APEX interview questions and provide guidance on how to answer them.

Oracle Application Express Interview Questions and Answers

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

1. What is Oracle Application Express?

Oracle Application Express (APEX) is a low-code development platform that enables you to build scalable, secure enterprise apps, with world-class features, that can be deployed anywhere.

2. How do you create a new application in Oracle Application Express?

You can create a new application in Oracle Application Express by going to the “Application Builder” section and clicking on the “Create” button.

3. Can you explain how to install Oracle Application Express on an existing database?

The first thing you need to do is download the Oracle Application Express installer from the Oracle website. Once you have the installer, you will need to unzip it and then run the setup.exe file. After accepting the terms and conditions, you will need to choose the installation type. There are two options: using the Oracle Database Express Edition or using an existing Oracle database. If you choose to use an existing database, you will need to provide the hostname, port, and SID of the database. After the installation is complete, you will need to run the configuration script. This will create the necessary tables and users for Oracle Application Express.

4. Can you explain the difference between shared and local workspaces in Oracle Application Express?

Shared workspaces are those that are accessible to all users of the application, while local workspaces are only accessible to the user who created them. In a shared workspace, all users have the same privileges, while in a local workspace, the creator of the workspace has full control over who can access it and what they can do.

5. Can you give me some examples of real-world applications that use Oracle Application Express?

There are a number of real-world applications that use Oracle Application Express. Some examples include the United States Department of Veterans Affairs, NASA, and the National Weather Service.

6. What are the main features offered by Oracle Application Express?

Oracle Application Express (APEX) is a low-code development platform that enables you to build scalable, secure enterprise apps, with world-class features, that can be deployed anywhere.

7. Why would you want to build a mobile app using Oracle Application Express?

Oracle Application Express is a great tool for building mobile apps because it is very user-friendly and easy to use. Additionally, it offers a lot of flexibility in terms of how you can design and build your app.

8. How does Oracle Application Express compare with other frameworks like Ruby on Rails or Django?

Oracle Application Express is a web application development framework that is similar to frameworks like Ruby on Rails or Django. It is used to develop web applications using Oracle databases. It includes a number of features that make it unique, such as the ability to automatically generate forms based on database tables, and the ability to easily integrate with Oracle databases.

9. Is it possible to migrate the code from one workspace to another? If yes, then how?

Yes, it is possible to migrate the code from one workspace to another. In order to do this, you will need to use the Export/Import feature within Oracle Application Express.

10. How can you keep your development environment up-to-date with regard to security patches?

You can keep your development environment up-to-date with regard to security patches by regularly checking for updates from Oracle and applying them as necessary. You can also subscribe to Oracle’s security mailing list to receive notifications of new security patches as they are released.

11. What are the key differences between SQL Workshop and Apex Workspace?

SQL Workshop is a tool for working with SQL databases, while Apex Workspace is a tool for working with Oracle Application Express applications. SQL Workshop provides a user interface for running SQL queries and commands, while Apex Workspace provides a user interface for developing and managing Oracle Application Express applications.

12. Are there any performance issues when thousands of users access a single instance of Oracle?

There are no known performance issues when thousands of users access a single instance of Oracle. In fact, Oracle is designed to handle large numbers of users and transactions.

13. Can you explain what translation workbench is?

Translation Workbench is a tool used to manage translations for multilingual applications. It allows you to create, edit, and delete translations for application text, messages, and labels.

14. What are some best practices for developing web apps using Oracle Application Express?

Some best practices for developing web apps using Oracle Application Express include using the built-in security features to control access to the app, using bind variables to avoid SQL injection attacks, and using the built-in report generation features to generate reports on app usage.

15. Does Oracle offer support for open source tools like Linux, Apache, JBoss etc.?

Yes, Oracle offers support for a number of open source tools, including Linux, Apache, and JBoss.

16. What’s the maximum size of characters allowed in an editable text area item?

The maximum size of characters allowed in an editable text area item is 4,000.

17. What is the usage of the apex_util package?

The apex_util package is used for a variety of tasks related to Oracle Application Express, including retrieving session information, generating HTML, and creating email messages.

18. How do you design a responsive page using Oracle Application Express?

In order to design a responsive page using Oracle Application Express, you will need to use the fluid grid layout. This will allow you to create a page that will resize itself based on the size of the device that it is being viewed on.

19. What are the different types of reports available in Oracle Application Express?

There are four different types of reports available in Oracle Application Express: Classic Reports, Interactive Reports, Matrix Reports, and Pivot Grid Reports.

20. What is a break field in context of reporting in Oracle Application Express?

A break field is a field that is used to break up data in a report. For example, if you have a report that contains data for multiple years, you could use a break field to break up the data by year. This would allow you to easily see the data for each year separately.