A manufacturing company has a large investment in a legacy Inventory Management System (IMS) developed with third-party technologies. You have been asked to design a Java EE application that interacts with it.

You would like to ensure the following:

• Minimalapplicationcodeisrequired to parsethe communicationmessages.
• Communication isasynchronousandstateless.
• Performance import of the existing system is minimal.

Which two technologies combined would meet these requirements?

A company has been soiling a desktop based billing application that has Character User Interface (CUI) application developed by using Java. The company would like to release the next version of this application with the following features: a GUI with a pluggable look- and-feel capability and the flexibility to support multiple database vendors.

Which two technologies would you use in the new version?

Your development team wants to use Google Guice. A previous architect assigned this request a low priority, citing the complexity of integration and no compelling benefits statements from the requesting team.

The team claims that their colleagues have achieved the integration using a pattern. This pattern reduced the level of difficulty and risk and did not require vendor support.

Which pattern fits this description?