What would prevent data from appearing in a custom report?

Answer:

• A filter that filters out all data
• Not sharing the Custom report with users in the same view
• Dimensions and metrics of different scopes
• Too many dimensions applied to the Custom report

Other questions from the Google Analytics Individual Qualification (GAIQ) Exam 

Looking for more answers to the GAIQ exam? We have a series of short questions and answers to help you out throughout your journey:

• What does assigning a value to a google analytics goal enable?
• What report shows which types of mobile devices visited a website?
• Auto-tagging is used to collect data from what kind of traffic?
• What campaigns require manual tags on destination URLs for tracking?