In ServiceNow, UI Actions are elements that facilitate user interaction within the platform, enabling users to perform specific actions such as form submissions, record updates, or triggering workflows. The valid types of UI Actions include:
Form Button: A button displayed on a form that, when clicked, executes a defined action.
Form Context Menu: An option added to the context menu of a form, providing additional actions related to the form's record.
Form Link: A hyperlink on a form that directs users to another page or executes a script.
List Banner Button: A button displayed in the banner area of a list, allowing actions to be performed on multiple records simultaneously.
List Choice: An option added to the list context menu for individual records, enabling actions on a selected record.
List Link: A hyperlink in a list that directs users to another page or executes a script.
Record Navigation Button: Buttons that facilitate navigation between records, such as Next and Previous buttons.
Options like "Workflow action" and "Form choice" are not recognized as standard UI Action types in ServiceNow.
For comprehensive details, refer to the official ServiceNow documentation on UI Actions.

A UI Action is a button, link, or choice that can be clicked by a user to perform an action, such as submitting a form or running a script. The following are UI Action types:
List choice. This is a UI Action that appears as a choice list on a list of records. It can be used to perform an action on multiple records at once, such as deleting or updating them.
Form button. This is a UI Action that appears as a button on a form. It can be used to perform an action on the current record, such as saving or approving it.
List banner button. This is a UI Action that appears as a button on the banner of a list of records. It can be used to perform an action on the entire list, such as exporting or printing it.
The following is not a UI Action type:
Form choice. This is not a UI Action type, but a field type. A form choice is a field that displays a choice list on a form. It can be used to select a value from a predefined set of options, such as priority or state. Reference: UI Actions, Field Types

Administrators can grant non-admin users the ability to develop global applications. Delegated Development is for the scoped applications only

In ServiceNow, Application Files are configuration records that define the various components and logic that constitute an application. These include artifacts such as:
Business Rules
Client Scripts
UI Actions
Script Includes
Tables and Fields
Workflows
These artifacts collectively define the functionality and behavior of the application. When an application is developed, ServiceNow automatically creates and manages these Application Files to represent the application's components.
Option C is correct because Application Files are the fundamental building blocks that comprise a ServiceNow application, representing its various components and configurations.
Options A, B, and D are incorrect:
A: XML exports of an Update Set represent changes made to an instance but are not synonymous with Application Files.
B: CSV files are typically used for data import/export and do not represent the configuration components of an application.
D: An XML export of table records pertains to data within a table, not the configuration artifacts that define application behavior.