Java question please help!!!

Question

What does the thread class method start() do?

 

(choices)

It begins an external method.

It makes an operating system thread begin to run.

It makes a specific internal Java thread begin running.

It makes an external class begin running.

Answer 1

To answer using the choices you provided it would be C.  I makes a specific internal Java thread begin running.  You may decide the content of that thread yourself in a runnable.  However depending on what OS you are using it could technically be B.  For example, On Linux, Java threads are implemented with native threads. Therefore on Linux, a Java program using threads is no different from a native program using threads.

Answer 2

The start() method starts a new thread of execution, and arranges things so that the new thread of execution invokes the run() method. The exact mechanics are OS-specific.