Beginning with Java

7. What method do you override to provide the code thats executed by a thread?

a.	exec	c.	run
b.	start	d.	task

8. Consider the following program:

public class CountDownApp { public static void main(String[] args) { Thread t1 = new CountDown(); Thread t2 = new CountDown(); t1.start(); t2.start(); } }

Assuming that the CountDown class extends the Thread class, how many threads are used to run this program?

a.	1	c.	3
b.	2	d.	4

9. How long will a thread that executes the following statement sleep?

Thread.sleep(50);

a.	exactly 50 milliseconds	c.	at least 50 milliseconds
b.	at most 50 milliseconds	d.	none of the above