Explanation
Setting the element to require if true allows the developer to configure a Disclosure element to require user input only if a condition is met. In this case, the condition is that the user already checked a Non-Disclosure Agreement Checkbox. The other options are either incorrect or irrelevant for this requirement.

Explanation
According to the FlexCard Designer Overview page, another possible cause of a field showing only the label is that "the field is null on the Salesforce record".

Explanation
An OS Action is the most efficient way to configure the action that invokes the OmniScript, as it allows the developer to reuse the same OmniScript across multiple FlexCards without creating separate actions for each one. A Custom Action is used to invoke a custom Apex class or Lightning web component. An OmniStudio Action is used to invoke an Integration Procedure or a Calculation Procedure. A Lightning Action is used to invoke a Lightning component or a Visualforce page.

Explanation
According to the OmniStudio Developer Guide, "To upsert a record, select the Upsert Key checkbox for the field that contains the unique identifier for the record. If you want to create a new record when no match is found, select Is Required for Upsert." Therefore, the correct answer is B.

Explanation
A DataRaptor Transform can be used to transform data from one format to another, such as JSON, XML, or CSV. The developer can specify the input and output paths for each field in the Transform tab. The developer can also use formulas to manipulate data in the Formula tab1. To transform contact data into a JSON array, the developer can use either of these methods:
Use a formula LIST(Contact), and add the output of the formula as the input in the Transform tab. This will create a list of contact objects from the input JSON and output it as a JSON array.
Set the Input JSON Path as Contact, the Output JSON Path as Contact, and the Output Data Type as List. This will output each contact object as an element of a JSON array.