Universal containers is migrating to Salesforce from a legacy system with existing SMTP-based integrations.
What Salesforce platform capability should an Integration Architect consider?

As part of their customer setup process. Universal containers requires that any address put into Salesforce be validated by the US Postal Service.
The customer must provide their address while they are on the phone with the Universal Containers representative.
What two solutions should a Technical Architect recommend to fulfill this requirement?
Choose 2 answers

Universal Containers is replacing a home-grown CRM system. Currently, a .Net application runs a batch process to query the CRM system nightly and create a CSV file that is picked up via SFTP and loaded to a SQL database.
What technology should an architect use to minimize custom development when replacing the CRM system with Salesforce?

Northern Trail Outfitters needs to send order and line items directly to an existing finance application webservice when an order if fulfilled. It is critical that eac order reach the finance application exactly once for accurate invoicing.
What solution should an architect propose?

Universal Containers is planning to develop a native mobile app for their employees to interact with Salesforce.
Which two options should the Architect recommend?