NTO wants to trigger a receipt email via the SOAP API whenever a customer makes a purchase. Their developer wrote the call using the TriggerSendDefinition object and the Create method, but no emails have been sent during his initial testing. Which object and method should the developer use?

A developer needs to process a payload from an external system in a CloudPage.
What Marketing Cloud Server-Side JavaScript Platform function should be used for converting a string payload in JSON format to a JavaScript object?

A developer receives a 401 Unathorized HTTP status message from a REST API request. What is the reason for this error?

Certification Aid wants to create a file drop automation with a filename pattern. An import file is placed daily on the Marketing Cloud Enhanced FTP server, and the file name always starts with the current month and day (e.g. OCT26). How should the filename pattern be defined? Choose 2.

A developer needs to find all subscribers on the Customers data extension who made a purchase in the last 30 days. Purchase data is on the Orders data extension which contains a column called 'PurchaseDate'. Contacts are identified in both data extensions by a column called 'ContactKey', and the Orders data extension can contain many instances of the same subscnber.
Which SQL keyword should the developer use to achieve the desired result?