Java Security Quiz

[Ans: D]
The AccessController class is used for access control operations and decisions. More specifically, the AccessController class is used for three purposes:
- to decide whether an access to a critical system resource is to be allowed or denied, based on the security policy currently in effect,
- to mark code as being "privileged", thus affecting subsequent access determinations, and
- to obtain a "snapshot" of the current calling context so access-control decisions from a different context can be made with respect to the saved context
However, the AccessController class CANNOT be used to compute a cryptographically secure hash. Instead, a MessageDigest must be used.

References: http://java.sun.com/j2se/1.4.2/docs/api/java/security/AccessController.html
References: http://java.sun.com/j2se/1.4.2/docs/api/java/security/MessageDigest.html