Universal Containers has a strict security model enforced through object, field, and row-based security mechanisms. The Architect would like to ensure the security model is being thoroughly tested using Apex automated tests. Which three considerations should be made when using the runAs() method to design Apex until tests?

The System Administrator at Universal Containers has created two list views called ListV1 and ListV2. One group of users should only see ListV1 and the second group of users should only see ListV2. Two public groups were created to restrict visibility to the respective list views. However, users in both groups are able to see both list views. What system permission in their profile enabled the users to see all list views?

Sales executives at Universal Containers (SC) want to create list views to filter opportunities for large at-risk Opportunities. These list views should only be available to certain executives that specialize in closing problematic deals. How can UC solve this requirement?

What is the best practice for testing sharing and visibility changes?

After setting up Customer Community and enable collaboration, the architect realizes that customers are only Chatter posts from other customers in their account.
What should the architect do to allow viewing chatter posts from all customers?