Oracle Reports is a powerful tool for developing reports based on Oracle databases, widely used in enterprises for creating professional, interactive, and printable reports. If you are preparing for an interview, you can expect questions that cover everything from basic concepts and architecture to advanced triggers, integration, and performance tuning.
In this article, we cover 50 commonly asked Oracle Reports interview questions with answers to help you prepare effectively.
General Oracle Reports Basics Interview Questions
1. What is Oracle Reports?
Oracle Reports is a reporting tool from Oracle that allows developers to design, generate, and publish reports in various formats such as PDF, HTML, Excel, and XML.
2. What are the main components of Oracle Reports?
- Report Builder (design tool)
- Reports Runtime (execution engine)
- Reports Server (manages and distributes reports)
3. What are the different modes of running a report?
- Runtime Previewer (for testing)
- Command line (batch execution)
- Web deployment via Oracle Reports Server
4. What is the difference between a data model and a layout model?
- Data Model: Defines queries, groups, and data sources.
- Layout Model: Defines how data is presented visually.
5. What are the common report formats supported?
- HTML
- RTF
- Excel (via delimited output)
- XML
Data Model and Queries Interview Questions
6. What are data groups in Oracle Reports?
Data groups represent hierarchical groupings of data from queries, used for organizing report data.
7. What is the difference between a formula column and a summary column?
- Formula Column: Uses PL/SQL to calculate values.
- Summary Column: Performs aggregation (SUM, AVG, COUNT) on data.
8. What is the use of placeholder columns?
They act as temporary containers for values that are computed at runtime.
9. How do you link queries in Oracle Reports?
By using data links (parent-child relationship) between groups.
10. What is a ref cursor query?
It is a PL/SQL cursor passed into Oracle Reports to fetch dynamic query results.
Layout and Presentation Interview Questions
11. What are the different layout styles available in Oracle Reports?
- Tabular
- Form-like
- Group above
- Group left
- Matrix
12. What is the difference between a repeating frame and a frame?
- Frame: A container for other objects.
- Repeating Frame: Repeats for each record returned by a query.
13. What are anchors in Oracle Reports?
Anchors establish relationships between layout objects to ensure correct positioning.
14. What is a boilerplate object?
Static text or graphics placed in the report layout.
15. How can you add charts in Oracle Reports?
By using Graph objects inside the layout model.
Triggers in Oracle Reports Interview Questions
16. What are report triggers?
PL/SQL code blocks that execute at specific report events.
17. What are the types of report triggers?
- Before Parameter Form
- After Parameter Form
- Before Report
- Between Pages
- After Report
18. When does the Before Report trigger fire?
Before report execution, typically used to initialize data.
19. What is the use of the After Report trigger?
It is used for cleanup activities such as closing cursors or logging.
20. What is the difference between Before Parameter Form and After Parameter Form triggers?
- Before Parameter Form: Executes before showing parameter form.
- After Parameter Form: Executes after user enters values in the parameter form.
Parameters and User Input Interview Questions
21. What are report parameters?
Parameters are user inputs that control report output.
22. What is the difference between bind parameters and lexical parameters?
- Bind Parameter: Prefixed with
:and used for values. - Lexical Parameter: Prefixed with
&and substitutes text in SQL.
23. How do you create a parameter form in Oracle Reports?
Automatically generated when parameters are defined, or manually designed.
24. What is the use of system parameters?
They are predefined by Oracle (e.g., DESTYPE, DESFORMAT, DESNAME).
25. How do you pass parameters from Oracle Forms to Oracle Reports?
Using RUN_REPORT_OBJECT built-in with parameter list.
Integration with Oracle Forms and Database
26. How do you call Oracle Reports from Oracle Forms?
By using the RUN_REPORT_OBJECT built-in.
27. What is the difference between RUN_PRODUCT and RUN_REPORT_OBJECT?
- RUN_PRODUCT: Legacy method (deprecated).
- RUN_REPORT_OBJECT: Newer, more flexible method.
28. What are the steps to integrate a report with a menu in Oracle Forms?
By calling RUN_REPORT_OBJECT in a menu item trigger.
29. How do you schedule a report in Oracle Reports?
By using Oracle Reports Server and job scheduling options.
30. How do you print a report directly without showing a preview?
By setting DESTYPE = PRINTER in system parameters.
Report Server and Deployment Interview Questions
31. What is Oracle Reports Server?
A component that manages, executes, and distributes reports in a multi-user environment.
32. How do you deploy a report on the web?
By placing the report on the Reports Server and accessing via URL or Oracle Portal.
33. What is the difference between synchronous and asynchronous report execution?
- Synchronous: User waits until the report finishes.
- Asynchronous: Report runs in background, user can continue work.
34. How do you monitor report jobs in Reports Server?
Using Reports Queue Manager or server log files.
35. What is the role of Reports Servlet?
It processes client requests and interacts with Reports Server.
Performance and Debugging Interview Questions
36. How do you improve report performance?
- Optimize SQL queries
- Use summary columns instead of formula columns where possible
- Minimize PL/SQL in layout
- Use report caching
37. What tools can you use to debug Oracle Reports?
- SRW.MESSAGE for debugging messages
- Reports trace options
- Database SQL trace
38. What is SRW.USER_EXIT?
It is used to call external procedures or host programs from a report.
39. What is SRW.DO_SQL?
It allows execution of SQL statements inside a report trigger.
40. How do you handle errors in Oracle Reports?
By using SRW.MESSAGE or exception handling in PL/SQL code.
Advanced Topics Interview Questions
41. What is XML Publisher (BI Publisher) in relation to Oracle Reports?
A newer reporting tool from Oracle that complements and eventually replaces Oracle Reports.
42. How do you generate XML output from Oracle Reports?
By setting the output format (DESFORMAT = XML).
43. What are JSP reports?
Reports deployed as JSP pages instead of traditional report files.
44. How do you integrate Oracle Reports with web services?
By generating XML output and consuming it in web services or BI Publisher.
45. What is bursting in Oracle Reports?
A feature that allows splitting and distributing report output to different destinations.
Security and Administration Interview Questions
46. How do you secure reports on the Reports Server?
By setting access permissions, using Oracle security roles, and configuring server settings.
47. How can you restrict users from running certain reports?
By implementing access control using Oracle roles or application-level security.
48. What is the use of SRW.SET_ATTR in Oracle Reports?
It sets attributes of report objects dynamically at runtime.
49. How do you manage report caching in Reports Server?
By configuring server properties to store and reuse frequently requested reports.
50. What is the future of Oracle Reports?
Oracle Reports is in sustaining support; Oracle recommends migrating to BI Publisher or Oracle Analytics Cloud for long-term solutions.
See also: Oracle Forms Interview Questions and Answers
Conclusion
Oracle Reports continues to be a vital tool in legacy Oracle applications, especially for enterprises still running Forms and Reports-based systems. By preparing with these 50 Oracle Reports interview questions and answers, you will cover the essential knowledge areas—data models, triggers, parameters, integration, performance, and administration—ensuring confidence in your interview.
