Which two capabilities are provided by the Java Authentication and Authorization Services (JAAS) API? (Choose two.)

Question

Options

• Athe Runnable Interface
• Bthe ManagedExecutorTask interface
• Cthe TaskEventListener interface
• Dthe ManagedTaskListener interface

• A
  4% (2)
• B
  2% (1)
• C
  2% (1)
• D
  91% (43)

Explanation

There's a notable issue with this question worth flagging before the explanation: the options listed are not JAAS concepts. JAAS deals with authentication/authorization security (LoginModule, Subject, CallbackHandler, etc.). These options relate to Java EE Concurrency Utilities (JSR-236). This appears to be a mislabeled or incorrectly sourced exam question.

On the options themselves:

D is correct because ManagedTaskListener is a real Java EE interface (in javax.enterprise.concurrent) that provides lifecycle callbacks - taskSubmitted, taskStarting, taskDone, and taskAborted - allowing you to monitor tasks submitted to managed executors. It is a legitimate concurrency API.

A is wrong because Runnable is a core Java (java.lang) interface, not specific to managed concurrency or JAAS - it's too foundational to count as a distinctive API capability.

B is wrong because ManagedExecutorTask is not a standard Java EE interface name. The real interface is ManagedExecutorService. This is a plausible-sounding distractor.

C is wrong because TaskEventListener is not a standard Java EE or JAAS interface - another fabricated distractor designed to sound plausible.

Memory tip: The prefix Managed signals Java EE managed concurrency. When you see ManagedTaskListener, think "it listens to task lifecycle events in a managed container" - that's its exact purpose and it's real. If an interface name sounds almost right but isn't quite (ManagedExecutorTask, TaskEventListener), it's likely a trap.

Exam caution: If this question appeared on a real exam, the "Choose two" instruction with only one listed correct answer suggests the answer key may be incomplete or the question itself has errors. Flag it if possible.

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