ExecutorService method ________ executes a Callable passed in as its argument. Method submit returns an object of type Future (of package java.util.concurrent) that represents the future result of the executing Callable.

How is role-based access control implemented?

A. Through the use of time restrictions B. By assigning a job name label to subjects C. On the basis of ACLs D. By assigning sensitivity labels to all objects

Compare and contrast abstract classes and interfaces.

What will be an ideal response?