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!
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Sar Maroof is the author of two Java books namely, Java quizmaster for beginners and A guide to build a Java application.
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Applied Science in Physics HBO Amsterdam
As well as Bachellor Science in Physics.
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  1. Reading this makes my deciisons easier than taking candy from a baby.

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