A developer is designing a web application that must verify for each request： The originating request is froma trusted network.
The client has a valid session.The client has been authenticated.
Which design pattern provides a solution in this situation？（）

Squeaky Beans Inc. hired an outside consultant to devel...

单项选择题

Squeaky Beans Inc. hired an outside consultant to develop their web application. To finish the job quickly，the consultant created several dozen JSP pages that directly communicate with the database. The Squeakybusiness team has since purchased a set of business objects to model their system， and the Squeaky developer charged with maintaining the web application must now refactor all the JSPs to work with the newsystem.
Which pattern can the developer use to solve this problem？（）

ClicktheExhibitbutton. TheApplianceclassisaSingletonth...

多项选择题

Click the Exhibit button.

The Appliance class is a Singleton that loads a set of properties into a Map from an external data source.Assume：
An instance of the Appliance class exists in the application-scoped attribute， appl The appliance object includes the name property that maps to the value Cobia The request- scoped attribute， prop，has the valuename. 
Which two EL code snippets will display the string Cobia？（）

GivenanELfunctionfoo，innamespacefunc，thatrequiresalonga...

多项选择题Given an EL function foo， in namespace func， that requires a long as a parameter and returns a Map，which two are valid invocations of function foo？（）