Java OCA OCP Practice Question 3193

Question

Given that a static method doIt() in the class Work represents work to be done, which block of code will succeed in starting a new thread that will do the work?.

Select the one correct answer. 

(a) Runnable r = new Runnable() {
      public void run() {
        Work.doIt();/*from  ww  w.j a va2  s.  c  o m*/
      }
    };
    Thread t = new Thread(r);
    t.start();
(b) Thread t = new Thread() {
      public void start() {
        Work.doIt();
      }
    };
    t.start();
(c) Runnable r = new Runnable() {
      public void run() {
        Work.doIt();
      }
    };
    r.start();
(d)  Thread t = new Thread(new Work());
    t.start();
(e) Runnable t = new Runnable() {
      public void run() {
        Work.doIt();
      }
    };
    t.run();



(a)

Note

A Thread object executes the run() method of a Runnable object on a separate thread when started.

A Runnable object can be given when constructing a Thread object.

If no Runnable object is supplied, the Thread object (which implements the Runnable interface) will execute its own run() method.

A thread is initiated using the start() method of the Thread object.




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