20 Oracle Forms Interview Questions and Answers

Oracle Forms is a software application for developing forms and screens for web applications. It is a popular tool among developers and is used by many large organizations. If you are applying for a position that involves Oracle Forms, it is important to be prepared for questions about the software. In this article, we review some of the most common Oracle Forms interview questions and provide tips on how to answer them.

Oracle Forms Interview Questions and Answers

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

1. What is Oracle Forms?

Oracle Forms is a software product for creating screens that can be used to enter, view, or change data in a database. It is a part of the Oracle Database and is used to build applications that run on the Oracle Database.

2. Why should I use Oracle Forms over other development tools?

Oracle Forms has many features that make it a powerful development tool. It offers a rich set of controls and objects, a drag-and-drop interface, and a wide range of built-in functions. Oracle Forms also integrates well with other Oracle products, making it a natural choice for developing Oracle-based applications.

3. Can you explain the architecture of a typical Oracle Forms application?

A typical Oracle Forms application has a three-tier architecture, consisting of a client tier, a middle tier, and a database tier. The client tier is where the Oracle Forms client software is installed. The middle tier is where the Oracle Forms server software is installed, and the database tier is where the Oracle database is located. The client tier communicates with the middle tier, which in turn communicates with the database tier.

4. What are some common features found in all Oracle Forms applications?

Some common features found in all Oracle Forms applications include the following:

– A data entry form that allows users to input data into the database
– A query form that allows users to search for data in the database
– A report form that displays data from the database in a tabular or graphical format

5. How do you create an Oracle Form?

You can create an Oracle Form by using the Form Builder tool.

6. Can you explain what a data block and control block are in the context of Oracle Forms?

A data block is a representation of data from a database table, while a control block is a representation of the interface elements that allow a user to interact with that data. In Oracle Forms, data blocks and control blocks are two separate objects that can be created and manipulated independently.

7. What’s the difference between “Create” mode and “Run” mode for Oracle Forms?

In “Create” mode, you are able to modify the structure of the form, including the fields, layout, and triggers. “Run” mode is what the end user will see and interact with; in this mode, you cannot make any changes to the form itself.

8. What are the different types of triggers that can be used to execute business logic?

There are four different types of triggers that can be used to execute business logic in Oracle Forms:

-Form-level triggers: These triggers fire when a specific event occurs at the form level, such as when the form is first opened or when it is closed.
-Block-level triggers: These triggers fire when a specific event occurs at the block level, such as when a block is first entered or when data is inserted into it.
-Item-level triggers: These triggers fire when a specific event occurs at the item level, such as when an item is first entered or when its value is changed.
-Key-level triggers: These triggers fire when a specific event occurs at the key level, such as when a key is pressed.

9. What are the differences between an Alert, Message, and Confirmation dialog boxes?

Alerts are used to display information that requires the user to take action, such as an error message. Messages are used to display information that does not require the user to take action, such as a confirmation that an action has been completed successfully. Confirmation dialog boxes are used to prompt the user to confirm an action before it is carried out.

10. What are the different types of items that can be added to an Oracle Form?

There are four different types of items that can be added to an Oracle Form: text items, graphic items, data items, and non-input items. Text items include items such as labels and headings. Graphic items are images that can be added to the form. Data items are items that will be populated with data from a database, such as a list of items or a table. Non-input items are items that do not accept input from the user, such as buttons.

11. What are the different types of canvas views available in Oracle Forms?

There are three different types of canvas views available in Oracle Forms: content, stack, and tabular. Content canvas views are the simplest, and are typically used for displaying static content. Stack canvas views are used for displaying multiple items on top of each other, like a stack of cards. Tabular canvas views are used for displaying data in a tabular format, like a spreadsheet.

12. What are the different types of windows available in Oracle forms?

There are four different types of windows available in Oracle forms: modal, modeless, pop-up, and child. Modal windows are those that must be dealt with before the user can continue working with the form. Modeless windows are those that the user can interact with even while other windows are open. Pop-up windows are those that appear over the top of the current window, and child windows are those that are opened within the current window.

13. Is it possible to add multiple canvases to a window? If yes, then how?

Yes, it is possible to add multiple canvases to a window in Oracle Forms. To do this, you will need to use the Object Navigator to create a new canvas, and then you can add it to the window.

14. What are the different components of the Property Palette?

The Property Palette is used to modify the properties of objects in Oracle Forms. The different components of the Property Palette include the Object Navigator, which is used to select the object that you want to modify; the Property Editor, which is used to modify the selected object’s properties; and the Property Inspector, which displays the current values of the selected object’s properties.

15. Can you give me some examples of how to call PL/SQL code from within an Oracle Form?

There are a few different ways that you can call PL/SQL code from within an Oracle Form. One way is to use the “Execute PL/SQL Code” action. Another way is to use the “Call PL/SQL Procedure” action. Finally, you can also use the “Run Form” action to call a PL/SQL procedure that is stored in a separate form.

16. Why would you want to choose client-server processing over Web-based processing with Oracle Forms?

Client-server processing can offer a number of advantages over Web-based processing, including improved performance, security, and integration with other client-side applications. In addition, client-server processing can provide a more seamless user experience, since the application can be designed to take advantage of the user’s local resources.

17. What do you understand by Triggers in Oracle Forms? Why are they useful?

Triggers are pieces of code that are executed in response to specific events. In Oracle Forms, triggers can be used to perform a wide variety of tasks, from validating data entry to customizing the behavior of a form. Triggers are often used to extend the functionality of a form beyond what is possible with the built-in features.

18. What are the steps involved in building an Oracle form?

The first step is to create a new form in the Forms Builder. Then, you will add objects to the form, such as fields, text boxes, and buttons. After that, you will need to set the properties of each object, such as the size, color, and font. Finally, you will need to compile the form and test it to make sure it works as intended.

19. What is a LOV? How does it differ from a List Item?

A LOV is a List of Values. It is a list of data that is displayed in a drop-down menu, from which the user can select a single value. A List Item is a single value from a list. It is not displayed in a drop-down menu, but is instead displayed as a static value.

20. What is the best way to build dynamic queries using Oracle Forms?

The best way to build dynamic queries using Oracle Forms is to use the bind variables feature. This allows you to create placeholders in your query that will be filled in with values at runtime. This makes it easy to change the query based on user input or other factors.