GSSP-JAVA practice

Q2 Single choice

Mark works as a Programmer for InfoTech Inc. He develops a class named Data that imports all the required packages. The class Data uses a method named PrintData(), which uses a method that checks whether the caller has a BeanUser security role.

Which of the following code of the method PrintData() will satisfy the requirement?

A
public void PrintData(){@DeclareRoles("BeanUser")@Resource SessionContext ctx;@RolesAllowed
("BeanUser")Principal caller = ctx.getCallerPrincipal();if (ctx.getCallerIdentity("BeanUser"))
{System.out.println("It is the correct user");}else{System.out.println("It is the incorrect user");}//more
code}
B
public void PrintData(){@DeclareRoles("BeanUser")@Resource SessionContext ctx;@RolesAllowed
("BeanUser")Principal caller = ctx.getEJBHome();if (!isCallerInRole(ctx)) {System.out.println("It is the
correct user");}else{System.out.println("It is the incorrect user");}//more code}
C
public void PrintData(){@DeclareRoles("BeanUser")@Resource SessionContext ctx;@RolesAllowed
("BeanUser")Principal caller = ctx.getCallerPrincipal();if (ctx.isCallerInRole("BeanUser"))
{System.out.println("It is the correct user");}else{System.out.println("It is the incorrect user");}//more
code}
D
public void PrintData(){@DeclareRoles("BeanUser")@Resource SessionContext ctx;@RolesAllowed
("BeanUser")Principal caller = ctx.getCallerPrincipal();if (ctx.getStatus("BeanUser")) {System.out.println
("It is the correct user");}else{System.out.println("It is the incorrect user");}//more code}