Sharing a Custom Report will share the report configuration and data included in the report.

Which parameters can be included with an event hit for reporting?

Category, Action, Label, Total Events Category, Action, Label, Unique Events Event, Category, Action, Label Category, Action, Label, Value Download Google Analytics Individual Certification Exam Answers (PDF)

To recognize users across different devices, what feature must you enable?

User ID AdWords Linking Audience Definitions Attribution Models Download Google Analytics Individual Certification Exam Answers (PDF)

What report shows the percentage of traffic that previously visited a website?

All traffic > Referrals report Behavior > New vs returning report Behavior > Frequency and Recency report Interests > Affinity categories report Download Google Analytics Individual Certification Exam Answers (PDF)