Data Modeling and Properties Flashcards

A developer notices that a data page is returning stale data after a record is updated by a case process. Which action should be taken to force the data page to reload?

Answer: Add a step in the flow to call the Refresh-Data-Page activity or set a property to invalidate the page

To force a data page to reload after an update, you can call the Refresh-Data-Page activity or use the 'Set' step to mark the data page for refresh.

In a data transform, a developer uses the 'Append and Map' action on a Page List property. What does this action do?

Answer: Adds a new page to the end of the list and maps values into it

'Append and Map' adds a new page to the end of a Page List and allows you to map source property values into the newly appended page.

A developer needs to validate that a property value is unique across all existing cases of the same class before saving. Which approach is most appropriate?

Answer: Use an Edit Validate rule that executes a Report Definition to check for existing values

An Edit Validate rule can run a Report Definition lookup to check if the value already exists in other cases, enforcing uniqueness programmatically.

Which of the following is a key difference between a Page Group and a Value Group property?

Answer: Page Group stores structured pages indexed by string keys; Value Group stores scalar values indexed by string keys

Page Group holds structured embedded pages keyed by a string, while Value Group holds scalar single values keyed by a string.

A Node-scoped data page is being used to cache a large reference dataset. What is a potential risk of this configuration?

Answer: All users on the node share the same cached data, so stale data affects all users simultaneously

Node-scoped data pages are shared by all users on the server node, so stale or incorrect data in the cache impacts every user until the cache is refreshed.

When using a data transform to copy data from one embedded page to another, which source type should the developer select?

Answer: Page

Selecting 'Page' as the source type in a data transform allows you to reference a specific named page on the clipboard to copy its structure and values.

A developer creates a property with the 'TrueFalse' data type. How is this value stored internally in the Pega database?

Answer: As the string values 'true' or 'false' in a varchar column

Pega stores TrueFalse property values as the string literals 'true' or 'false' in a character column in the database.