Universal Containers has a batch integration that runs every five minutes to load Shipment records related to existing orders that have been updated in the previous five minutes. the integration is not reporting any errors, but some Shipment records are not being loaded.
What could be the problem?

Universal Containers has a custom Visualforce page that makes a callout to an external service to show historical sales data from the warehouse. Due to heavy usage and slow response time of the external web service, Salesforce continues to hit the Apex Concurrent limit. Assuming that external web service response time can't be improved, what changes can be made to the custom Visaualforce page and Apex Controller to avoid hitting the Apex Concurrent limit?

Universal Containers is building a native mobile application that queries and updates data in their Salesforce in real time What statement is correct about the Salesforce APIs?

A large enterprise customer operating in a high regulated industry is planning to implement Salesforce for customer facing associates in both Sales and Service, and back office staff. The business processes that Salesforce supports are critical to the business.
Salesforce will be integrated to multiple back office systems to provide a single interface for associates.
Reliability and monitoring of these integrations is required as associates support customers.
Which integration solution should the architect consider when planning the implementation?

Universal Containers (UC) has many existing applications, including Salesforce, that their users access. UC would like to integrate these applications with Salesforce so that users can accomplish all of their tasks in one user interface.
What is the recommended solution for integrating these applications into Salesforce?