Quizzes – Java threads

The following Java exercise(s) are designed to help you understand the article to which it belongs. If the following quizzes are too hard, then I recommend to read the article first, which offers a theoretical explanation including examples and exercises.  

thread_states_life_cycle-gray

Quiz 1: An easy Java thread quiz.

What is written to the standard output as the result of executing the following code?

public class MyThread extends Thread{

	public static void main(String[] args){
		Thread t = new Thread(new MyThread());
		Thread t2 = new Thread(new MyThread());
		Thread t3 = new Thread(new MyThread());
		t.start();
		t2.start();
		t3.start();
		t.setPriority(1);
		t3.setPriority(3);
	}
	public void run(){
		System.out.print(Thread.currentThread().getPriority() + " ");
	}
}

Select the correct answer.


 

Quiz 2: Using Java thread methods.

What is written to the standard output as the result of executing the following code?

public class MyThread extends Thread{

	public MyThread(){}
	public MyThread(String string){
		super(string);
	}
	public void run(){
		System.out.print(" " + getName());
		try{
			sleep(500);
		}
		catch(InterruptedException e){
		}
	}
	public static void main(String[] args){
		MyThread th1 = new MyThread();
		Thread th2 = new MyThread("2");
		Thread th3 = new MyThread("3");
		Thread th4 = new MyThread("4");
		Thread th5 = new MyThread("5");
		th1.setName("1");
		th2.start();
		th3.setPriority(1);
		th4.start();
		th5.isAlive();
	}
}

Select the correct answer.


Please, leave your questions, feedback and suggestions in the comments below!
SarMaroof.com offers a practical method to learn and improve your Java skills. It avoids unnecessary long boring theoretical explanations, but it uses many exercises and quizzes.



Sar Maroof is graduated from HBO Amsterdam “higher professional education” when he already had a bachelor of science degree in Physics.
He is a SUN certified JSP as well as EJB. He has experience with Java since 2001 and worked for several big as well as small companies and later as a freelancer.
He is the author of Java quizmaster and Build a Java application in 7 days.

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  1. Reading this makes my deciisons easier than taking candy from a baby.

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