Wipro Enterprises Ltd Technical Lead Interview Questions, Process, and Tips

Display days of each month based on user input in OAF page.

• Get the month name input from user

• Use Java Calendar class to get number of days in the month

• Create an array of strings to store the days

• Loop through the days and display them on the page

Steps for upgrading OAF page from 11i to R12

• Identify the customizations made in the OAF page

• Analyze the changes in the OAF framework between 11i and R12

• Update the code to comply with the new OAF framework

• Test the upgraded OAF page thoroughly

VO and CO extensions are steps in SAP implementation for customizing business processes.

• VO (View Override) extension is used to modify the standard SAP screens and add custom fields or change the layout.

• CO (Customer Object) extension is used to create custom objects in SAP and link them to standard objects.

• VO and CO extensions are done using the Enhancement Framework in SAP.

• VO and CO extensions are important for custom...read more

RowImpl methods for validation handling.

• RowImpl has methods like validate(), validateAttribute(), validateValue() for validation handling.

• validate() method validates all attributes of a row.

• validateAttribute() method validates a specific attribute of a row.

• validateValue() method validates a specific value of a row.

• These methods can be customized to add custom validation rules.

Implement validation checks before saving data to restrict user from entering wrong data.

• Implement client-side validation checks using JavaScript to ensure data entered is in correct format.

• Implement server-side validation checks to ensure data entered is valid and meets business rules.

• Display error messages to the user if data entered is incorrect.

• Disable the save button until all validation checks have passed.

Oracle provides steps to avoid custom part of workflow from being overridden.

• Use the 'freeze' feature to lock the workflow and prevent changes

• Use the 'versioning' feature to create multiple versions of the workflow

• Use the 'access control' feature to restrict access to the workflow

• Use the 'approval' feature to require approval before changes can be made

• Use the 'audit trail' feature to track changes made to the workflow

Error we get when we do VO extension.

• The error occurs when we try to extend a VO that is already extended.

• The error message is 'oracle.jbo.TooManyObjectsException: JBO-25014: Another user has changed the row with primary key'.

• This error can be resolved by refreshing the VO or by using a different VO extension.

• It is important to ensure that VO extensions are used correctly to avoid this error.

SPEL stands for Spring Expression Language and is used for evaluating expressions at runtime.

• SPEL is used in Spring Framework for configuring beans and annotations.

• It supports various operators, functions, and variables.

• Example: #{2 + 3} will evaluate to 5.

• Example: #{T(java.lang.Math).PI} will evaluate to the value of PI.

• Example: #{myBean.property} will evaluate to the value of the property of myBean.