Java EE 7 Application Developer — Question 4

Given an HttpServletRequest request and an EJB SessionContext ctx.
Which is a valid way to retrieve the Principal invoking either behavior?

Answer options

• A. request.getCallerPrincipal() and ctx.getCallerPrincipal()
• B. request.getUserPrincipal() and ctx.getUserPrincipal()
• C. request.getCallerPrincipal() and ctx.getUserPrincipal()
• D. request.getUserPrincipal() and ctx.getCallerPrincipal()

Correct answer: A

Explanation

The correct answer is A because request.getCallerPrincipal() and ctx.getCallerPrincipal() are both valid methods to retrieve the invoking Principal in their respective contexts. Options B, C, and D are incorrect as they either use methods that aren't appropriate for retrieving the invoking Principal or mix the correct methods in a way that doesn't provide the intended result.