50 Oracle APEX Cloud Developer Professional Practice Questions: Question Bank 2025

An APEX developer wants to display a list of employees in an Interactive Report. Business users must be able to filter and sort the data without requiring any code changes. Which APEX component best satisfies this requirement?

You need to ensure that a page item value is computed on the server each time the page is submitted, and it must not rely on the browser. Which APEX feature is the best fit?

An APEX application uses a table-based form. You want APEX to automatically perform the DML (insert/update/delete) for the form using built-in processing. Which process type should you use?

A developer created a LOV (List of Values) to populate a Select List item. The business wants the display values to be shown to the user while storing a stable key in the table. Which LOV design meets this requirement?

A report region uses a SQL query that references the current user's department stored in an application item (APP_DEPT). You notice the query does not filter as expected when multiple browser tabs are used for different departments. What is the most appropriate fix?

You are troubleshooting an APEX page where a button click is expected to refresh a region, but nothing happens. The Dynamic Action is defined on the button with action 'Refresh' for the target region. Which is the most likely cause?

A developer needs to call PL/SQL logic asynchronously from the browser to validate data and return JSON without a full page submit. Which APEX capability is designed for this purpose?

Your application must enforce that users can only see and update rows belonging to their business unit. You want a solution that protects data even if a user tampers with the page or calls the report URL directly. What is the recommended approach?

A developer created a modal dialog page for editing an employee record. Users report that changes appear to save, but the calling page does not show updates after the dialog closes. What is the most appropriate solution?

An APEX report uses a WHERE clause like "where deptno = :P10_DEPTNO". Users sometimes get no rows even though the department exists. Investigation shows :P10_DEPTNO is sometimes NULL because the item is not submitted during partial refresh. What is the best practice fix?

You are designing an APEX page that includes both a classic report region and a chart region. Both regions should refresh when the user changes a single Select List item (P10_DEPTNO) without submitting the page. What is the recommended approach?

Your APEX application uses a shared LOV for selecting customers. Several pages display the customer name but store CUSTOMER_ID. Which LOV return/display configuration is best practice for referential integrity?

An administrator wants to ensure users can only access an APEX application after authenticating. Which component directly controls how users are authenticated?

A page contains a form with an Automatic Row Processing (DML) process. Users report that updates intermittently fail when two users edit the same row, and one user overwrites the other’s changes. Which configuration best helps detect lost updates?

Your Interactive Report query includes a bind variable :P20_STATUS. The report is refreshed via Dynamic Action when the item changes, but the report still shows data for the old status until the page is submitted. What is the most likely missing configuration?

A team wants to centralize access control: only managers can see a Salary region across multiple pages, and only HR admins can execute a specific page process. Which approach is most maintainable?

An APEX application includes a REST Data Source used by several pages. The external REST service requires an API key and occasional key rotation. What is the recommended way to manage this credential securely in APEX?

Your application uses Friendly URLs. After deployment, users report that bookmarked links sometimes redirect to the home page instead of the intended page when parameters are present. Which setting most directly protects against URL tampering while still allowing intended navigation?

A developer places a highly complex SQL query directly in multiple report regions across the application. Performance troubleshooting becomes difficult, and small changes require editing many pages. What is the best architectural improvement in APEX/Oracle Database?

You need to let an external system push order status updates into your APEX application. The external system cannot use APEX UI and must call an endpoint securely. You want minimal custom PL/SQL and a design aligned with APEX capabilities. What should you implement?

You are building an APEX app with an Interactive Grid that edits rows in a table. Users report that after clicking Save, they sometimes get a generic error and no rows are saved, but the grid does not highlight the specific row causing the issue. Which approach best helps users identify and correct row-level data problems during grid save?

A developer wants to restrict access so only members of an application role can view a specific page, while other authenticated users can still access the rest of the application. What is the recommended APEX approach?

Your APEX application needs to call an external REST API that requires an API key and should not expose the key to end users. Which design is most appropriate?

A teammate asks where APEX stores and retrieves application definition metadata (pages, regions, items, security settings). What is the correct conceptual answer?

An APEX page has a report region based on a SQL query with a bind variable :P10_DEPTNO. Users complain the page is slow because the report query runs even when P10_DEPTNO is null and returns many rows. What is the best APEX technique to prevent the report from running until the user provides a value?

A team is modularizing common UI and logic across multiple APEX applications in the same workspace. They want to maintain a single definition of shared components and publish updates centrally. Which feature best fits this requirement?

After enabling Session State Protection (SSP), a page process that reads a value from a URL parameter (for example, P12_ID) starts failing with an "invalid checksum" error when users click links from an external email. What is the recommended fix?

You need to load 500,000 rows from a CSV file into a staging table and validate data before moving it into production tables. Users want progress feedback and a record of rejected rows with reasons. Which approach is most appropriate in APEX?

Your application must enforce tenant isolation (row-level security) across many pages and components without repeating WHERE clauses in each SQL query. What is the best database-centric approach when using APEX?

A page contains multiple regions whose SQL queries reference expensive PL/SQL functions. Performance is inconsistent because the function is executed repeatedly per row. What is a best-practice tuning approach in APEX/Oracle SQL to reduce repeated function calls?

You are troubleshooting an APEX app where a region’s SQL report shows fewer rows than expected only for some users. The SQL query is the same for everyone. Which APEX feature most commonly explains user-specific row filtering without changing the region query?

A page has an Interactive Grid based on a table. Users can insert and update rows, but nothing is saved when they click Save. There are no errors. What is the most likely missing configuration?

You need to call a REST endpoint from APEX and include an API key in an HTTP header. The key must not be visible in the page source or stored in clear text in an item. What is the recommended approach?

A developer wants a button to appear only when a page item P10_STATUS equals 'OPEN'. Which is the simplest APEX configuration to implement this requirement?

In a multi-page workflow, you must ensure a value calculated on Page 1 is reliably available to Page 2 after navigation, without relying on URL parameters. Which technique is most appropriate?

You have a page process that inserts into an ORDERS table and needs the generated ORDER_ID for subsequent inserts into ORDER_LINES in the same request. What is the best practice in APEX/PLSQL to obtain the generated key?

Users report that a report region sometimes shows 'ORA-01008: not all variables bound' after a recent change. The report query references :P20_DEPTNO in the WHERE clause. What is the most likely cause?

Your team needs to deploy an APEX application from development to production while ensuring the target environment keeps its own settings (for example, external endpoint base URLs and feature toggles). Which approach best supports this requirement?

You are designing an APEX app that must support deep links to specific records (e.g., a customer detail page) while preventing URL tampering of primary key values. Which design is most appropriate?

A page contains a faceted search and an Interactive Report based on a complex SQL statement with multiple joins and aggregations. Performance is slow and the query is executed frequently with different filter combinations. Which approach is most likely to provide a significant, scalable performance improvement while keeping the UI behavior?

You are troubleshooting an APEX page where a computation is defined to set :P10_TOTAL based on two items. Users report that the displayed value is always one step behind (it shows the previous submit’s total). Which change most directly fixes this?

An APEX application must call a REST endpoint that requires an API key header. You need to avoid hardcoding the key in PL/SQL and allow administrators to rotate it without redeploying the app. What is the recommended approach?

A developer creates a new page and wants it to appear in the application’s navigation menu without manually editing the list. The app uses the standard APEX navigation menu pattern. Which feature supports this best?

Your interactive grid is based on a table with a virtual computed column (defined in the SQL query using an expression). Users want to edit other columns, but the grid raises errors during save complaining about the computed column. What is the best fix?

You have a report region whose SQL references a page item :P20_STATUS. Changing the item value should refresh the report without a full page submit. Which configuration is required for the report to use the new value on refresh?

A page process performs an INSERT into ORDERS and then needs to use the newly generated ORDER_ID (identity column) to insert related rows into ORDER_LINES. What is the most reliable approach in APEX PL/SQL?

You need to implement row-level security so users can only see and modify rows in a table that match their department. The application uses multiple pages and different region types (reports, forms, IG). What is the best practice approach?

An APEX app integrates with an external REST service that can intermittently return HTTP 429 (Too Many Requests). You want to reduce user-facing errors and implement a controlled retry strategy. Which approach is most appropriate?

You are designing an APEX application that must support offline-capable data capture in the field and later synchronize changes to the database when connectivity is restored. Which statement is most accurate for APEX best practices?

A security review finds that an APEX application executes dynamic SQL built from user-provided search text and column names (for flexible filtering). You must keep flexible filtering but prevent SQL injection. What is the most secure design?