Which type allows you to share servlet attributes across your entire web application?

Which statement is true about the WS-Security standard?

Your customer is setting up serial control. The requirement is that if item A has serial 123, then they don't want item B to also have serial 123 within the same inventory organization.
Which serial control setting must be used to meet this requirement?

Given the code fragment:

Which URL triggers the invocation of the getEmployee() method?

You have been assigned to the Widget Editor portion of an application. It contains a Widget Editor Facelet page, the Widget class, and a simple WidgetEditor backing bean, which contains a reference to the current Widget instance.
Given the code fragment from the Widget class:

Given the code fragment from the Facelet page:

The page displays Conversion Error when a user fills out all the form fields and clicks the Save button.
Which step do you perform to fix this problem?