Certification Aid sends an email to a newly imported List with Subscribers who have no associated Subscriber Key. Which value will become the Contact Key? Choose 1.

A developer wants to create a Send Log Data Extension to increase efficiency with tracking email sends.
Which two best practices should the developer remember when configuring the Send Log Data Extension?
Choose 2 answers

A developer want to email a subscriber who is currently being processed for a Contact Deletion request. When could the Contact be reintroduced after a Contact Delete operation has started?

A developer is creating a custom preference center and wants to log unsubcriber events from the CloudPage. Which set of parameters should be captured and provided to the LongUnsubEvent Execute Call to ensure accurate unsubscribe information?

A developer receives Error Code 5 when performing a SOAP API call. The error states: "Cannot Perform 'Post' on objects of type 'SentEvent'".
What could be the issue?