One of the uses of the ServiceNow REST API Explorer is to create sample code for sending REST requests to ServiceNow. The REST API Explorer is a tool that allows you to discover and test the ServiceNow REST APIs. You can select an API endpoint, set the HTTP method, parameters, headers, and body, and then execute the request. The REST API Explorer will show you the response status, headers, and body, as well as generate sample code for various languages and frameworks, such as cURL, Java, JavaScript, Node.js, Python, Ruby, and more. References: [Use the REST API Explorer - Product Documentation: Tokyo - ServiceNow],
[Introduction to Scripted REST APIs - ServiceNow Developers]
Reference: https://developer.servicenow.com/dev.do#!/learn/courses/newyork/ app_store_learnv2_rest_newyork_rest_integrations/ app_store_learnv2_rest_newyork_inbound_rest_integrations/ app_store_learnv2_rest_newyork_introduction_to_the_rest_api_explorer

https://docs.servicenow.com/bundle/tokyo-platform-administration/page/administer/form-administration
/concept/c_FormDesign.html
The Form Designer is a graphical interface for creating and customizing forms. The following statements are true for the Form Designer:
* To add a field to the form layout, drag the field from the Fields tab to the desired destination on the form. This will add the field to the form view without changing the table definition.
* To create a new field on a form's table, drag the appropriate data type from the Field Types tab to the form and then configure the new field. This will create a new column on the table and add the field to the form view.
* To remove a field from the form layout, hover over the field to enable the Action buttons, and select the Delete (X) button. This will remove the field from the form view but not from the table definition.
The following statement is false for the Form Designer:
* To add a section to the form layout, drag it from the Field Types tab to the desired destination on the form. This is incorrect because sections are not available in the Field Types tab. To add a section, click the Add Section button on the toolbar or right-click on the form and select Add Section. References: Introduction to App Engine Studio for Developers, ServiceNow Studio Overview, Form Designer

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. References: UI Actions, Field Types Reference: https://docs.servicenow.com/bundle/orlando-platform-administration/page/administer/list- administration/task/t_EditingAUIAction.html

Self-invoking. Learn JavaScript!
This type of JavaScript function is known as self-invoking or immediately-invoked function expression (IIFE). It is a function that is defined and executed at the same time, without being assigned to a variable or being called by another function. It is often used to create a local scope for variables and avoid polluting the global namespace. References: [W3Schools - JavaScript Function Definitions], [MDN Web Docs - Immediately-invoked function expressions]