A task class must implement the ____________ interface. You may create your own

Question

A task class must implement the ____________ interface.

You may create your own custom thread class by extending which of the following classes?

Which Java keyword can be used to create a critical region or an entire method that allows execution by a single thread at a time?

Analyze the following code:

public abstract class Test implements Runnable {
   public void doSomething() {
   };
}

Analyze the following code:

public class Test implements Runnable {
   public static void main(String[] args) {
       Thread t = new Thread(this);
       t.start();
   }

   public void run() {
       System.out.println("test");
   }
}

Explanation / Answer

A task class must implement the __________ mj + __ interface.

Runnable

==================================================

You may create your own custom thread class by extending which of the following classes?

Thread

==========================================================

Which Java keyword can be used to create a critical region or an entire method that allows execution by a single thread at a time?

mutex

=========================================================

Analyze the following code:

public abstract class Test implements Runnable {
   public void doSomething() {
   };

The class compiles fine.

(a) is wrong because class Test is abstract, (b) is wrong because an abstract class may contain no abstract method. (c) is correct.

========================================

Analyze the following code:

public class Test implements Runnable {
   public static void main(String[] args) {
       Thread t = new Thread(this);
       t.start();
   }

   public void run() {
       System.out.println("test");
   }
}

A.The program does not compile because this cannot be referenced in a static method.

===============================================================

hope this will help

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