Oracle Apex Developer

Oracle Apex Developer Interview Questions and Answers

Updated 20 Oct 2024

Q1. What is page processing and page rendering ?

Ans.

Page processing involves executing server-side logic while page rendering involves generating HTML output for the client.

  • Page processing involves executing PL/SQL code and other server-side logic to retrieve and manipulate data.

  • Page rendering involves generating HTML output for the client based on the processed data.

  • Page processing and rendering are separate phases in the Oracle Apex request cycle.

  • Page processing can include validations, computations, and database operations....read more

Q2. What are the use of web services?

Ans.

Web services are used to exchange data between different applications over the internet.

  • Allows communication between different platforms and programming languages

  • Enables sharing of data and functionality

  • Can be used for integration with third-party applications

  • Examples include REST, SOAP, and JSON-RPC

Q3. What is page zero concept ?

Ans.

Page zero is a hidden page in Oracle Apex used for global variables and computations.

  • Page zero is not visible to end-users.

  • It is used for storing global variables and computations.

  • Page zero is automatically created by Oracle Apex.

  • It can be accessed using the $x variable in JavaScript.

  • It is useful for sharing data between pages and regions.

Q4. Apex collections and its use case

Ans.

Apex collections are in-memory temporary storage areas that allow you to store and manipulate data during a user session.

  • Used to store data temporarily during a user session

  • Can be used to pass data between pages or processes

  • Can improve performance by reducing database calls

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Q5. Authentication used in apex

Ans.

Oracle Apex uses built-in authentication schemes for user authentication.

  • Oracle Apex provides various built-in authentication schemes such as LDAP, Database, and OAuth.

  • Authentication schemes can be customized and extended to meet specific requirements.

  • Users can be authenticated using username/password, social media accounts, or single sign-on solutions.

  • Authentication can also be integrated with external identity providers for seamless user access.

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