What capability should an Integration Architect consider if there is a need to synchronize data changed in Salesforce to a 3rd party with a JSON-based API endpoint?

Universal Containers would like to display data from an external system inside of Salesforce, and has chosen not to enable lightning Experience. They do not need the data for any other purposes within Salesforce.
Which approach should an Integration Architect recommend that matches the Salesforce UI?
Choose 2 answers

The URL for an external service has been changed without prior notice. The service provides up to date money exchange rates that is accessed several times from Salesforce and is a business critical function for end users.
Which two solutions should an Integration Architect recommend be implemented to minimize potential downtime for users in this situation?
Choose 2 answers

What is the first thing an Integration Architect should validate if a callout from a Lightning Web Component to an external endpoint is failing?

Universal Containers has a custom Salesforce UI that is used by all users to check on a container's status. This check is done via an integration to its back-end system which all users have access to. However, some users have a higher privilege access into that back-end system, which allows them to retrieve more details in the same container status check. Those users would like the same Salesforce UI to recognize their higher privilege access and display those extra details for them, but without allowing all users to see the same level of details.
What is the recommended security approach to satisfy this requirement?