An Integration Developer is developing an HR synchronization app for a client. The app synchronizes Salesforce record data changes with an HR system that's external to Salesforce.
What should the integration architect recommend to ensure notifications are stored for up to three days if data replication fails?

When user clicks Check Preferences as part of a Lightning flow in Salesforce, preferences from an externally hosted RESTful service are to be checked in real-time. The RESTful service has OpenAPI 2.0 JSON definitions, responding in data types of Boolean and string values.
Which integration pattern and mechanism should be selected to meet the conditions?

Universal Containers (UC) uses Salesforce to track the following customer data:
1. Leads,
2. Contacts
3. Accounts
4. Cases
Salesforce is considered to be the system of record for the customer. In addition to Salesforce, customer data exists in an Enterprise Resource Planning (ERP) system, ticketing system, and enterprise data lake. Each of these additional systems have their own unique identifier. UC plans on using middleware to integrate Salesforce with the external systems.
UC has a requirement to update the proper external system with record changes in Salesforce and vice versa.
Which two solutions should an Integration Architect recommend to handle this requirement?
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

business requires automating the check and update of the phone number type classification (mobile vs. landline) for all in-coming calls delivered to their phone sales agents. The following conditions exist:
1. At peak, their call center can receive up to 100,000 calls per day.
2. The phone number type classification is a service provided by an external service API.
3. Business is flexible with timing and frequency to check and update the records (throughout the night or every 6-12 hours is sufficient).
A Remote-Call-In pattern and/or Batch Synchronization (Replication via ETL: System -> Salesforce) are determined to work with a middleware hosted on custom premise.
In order to implement these patterns and mechanisms, which component should an integration architect recommend?