Assuming granular locking is enabled, what activity can happen in parallel to changing a community account owner without risking group membership lock errors?

Cosmic Harvest is a company that produces olive oil. It uses Salesforce to manage customer information, and is setting up a security model based on organization-wide defaults, sharing rules, and programmatic sharing.
The IT Manager of the company would like the Salesforce developer to follow test driven development while designing unit tests to verify records that are shared using Apex. Which of the following considerations apply to the use of the runAs() system method for this requirement?Choose 2 answers.

DreamHouse Realty uses a List View to show all open Leads that were created in the last quarter. This List View needs to be visible to certain groups of users.
What ae two available options for sharing the List View? (Choose two.)

Ursa Major Solar has the goal of increasing performance of the following:
- "Record Access"
- "Sharing Calculations"
Which three areas should an Architect review to help Ursa Major Solar achieve this goal? (Choose three.)

A developer at Universal Containers is building an integration within a managed package for their internal org that requires login to an external system. The end point requires basic authentication. The Architect would like to ensure that the username and password are managed securely.
Which three options should the Architect recommend to secure the credentials?
Choose 3 answers