Which three areas should the Architect review in order to increase performance of "Record Access" and "Sharing" calculations?
Choose 3 answers.

Every day, Ursa Major Solar uploads a large number of parent and child records into Salesforce to maintain integrations with other systems that update their data in scheduled batches or continuously in real time. Ursa Major Solar is concerned about locking errors.
Which two situations may introduce locking errors for Ursa Major Solar? (Choose two.)

Universal Containers (UC) has recently changed its internal policy to follow market regulations and create an internal team to manage the collection process. Only this team should have access to Invoke records. currently, invoke is a child in a Master-Detail relationship to Account. Although related lists have been removed from the page layouts, some profiles stills have access to the invoice object.
Which approach should an architect recommend to fix this problem?

Ursa Major Solar needs an Architect to develop Apex Managed Sharing code for the custom Job object. The sharing settings for the Job object are set to Private.
The Architect is assigning level for the record.
Which two lines of code will cause a DMLA exception on insert to the database? (Choose two.)

Universal Containers is a fast-growing company that sells containers globally. It has thousands of dealerships throughout the world where local dealers service Containers sold locally. They recently opened two dealerships in California: NorthCal and SoCal. Universal Containers implemented a new partner community to enable their dealers. Each dealership has a dealer Manager who has all service agents report into them.
Assuming a private sharing model, what is the best option to enable dealer managers to have visibility to customer cases within their dealership and not across all dealerships?