1. In java a thread can be created by ……….

2. When a class extends the Thread class ,it should override ………… method of Thread class to start that thread.

3. What will be the output of the following program 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”);
    }
}

4. Which of the following constructor of class Thread is valid one?

5. Analyze the following code:

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

6. Analyze the following code:

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

    public void run() { }
}

7. Analyze the following code:

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

    public Test(){
        Thread t = new Thread(this);
        t.start();
    }

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

8. What will be the output?

class One extends Thread{
public void run(){
for(int i=0; i<2; i++){
System.out.print(i);
}
}
}

public class Test{
public static void main(String args[]){
Test t = new Test();
t.call(new One());
}

public void call(One o){
o.start();
}
}

9. What will happen when you attempt to compile and run the following code?

1. public class Test extends Thread{
2.    public static void main(String argv[]){
3.       Test t = new Test();
4.       t.run();
5.       t.start();
6.    }
7.    public void run(){
8.       System.out.println(“run-test”);
9.    }
10. }

10. What will happen after compiling and running following code?

class A implements Runnable{
   public void run(){
      System.out.println(“run-a”);
   }
}

1. public class Test{
2.    public static void main(String… args){
3.       A a = new A();
4.       Thread t = new Thread(a);
5.       t.start();
6.       t.start();
7.    }
8. }

11. Predict the output:

class A implements Runnable{
   public void run(){
      try{
         for(int i=0;i<4;i++){
            Thread.sleep(100);
            System.out.println(Thread.currentThread().getName());
         }
      }catch(InterruptedException e){
      }
   }
}

public class Test{
   public static void main(String argv[]) throws Exception{
      A a = new A();
      Thread t = new Thread(a, “A”);
      Thread t1 = new Thread(a, “B”);
      t.start();
      t.join();
      t1.start();
   }
}

12. What will be the output?

class A extends Thread{
   public void run(){
      for(int i=0; i<2; i++){
         System.out.println(i);
      }
   }
}

public class Test{
   public static void main(String argv[]){
      Test t = new Test();
      t.check(new A(){});
   }
   public void check(A a){
      a.start();
   }
}

13. What will happen when you attempt to compile and run the following code?

class A implements Runnable{
   public void run(){
      System.out.println(“run-A”);
   }
}

1. public class Test{
2.    public static void main(String argv[]){
3.       A a = new A();
4.       Thread t = new Thread(a);
5.       System.out.println(t.isAlive());
6.       t.start();
7.       System.out.println(t.isAlive());
8.    }
9. }

14. Which of the following are methods of the Thread class?
1) yield()
2) sleep(long msec)
3) go()
4) stop()

15. What notifyAll() method do?

16. What is the output for the below code ?

public class Test extends Thread{
   public static void main(String argv[]){
      Test t = new Test();
      t.run();
   }

   public void start(){
      for(int i = 0; i < 10; i++){
         System.out.println(“Value of i = ” + i);
      }
   }
}

17. Which keyword when applied on a method indicates that only one thread should execute the method at a time.

18. What is the output for the below code ?

class A implements Runnable{
   public void run(){
      System.out.println(Thread.currentThread().getName());
   }
}

1. public class Test{
2.    public static void main(String… args){
3.       A a = new A();
4.     Thread t = new Thread(a);
5.     t.setName(“good”);
6.     t.start();
7.    }
8. }

19. Predict the output:

public class Test extends Thread{
   private int i;
   public void run(){
      i++;
   }

   public static void main(String[] args){
      Test a = new Test();
      a.run();
      System.out.print(a.i);
      a.start();
      System.out.print(a.i);
   }
}

20. What will be the output after compiling and executing the following code?

public class Test implements Runnable{
   public static void main(String[] args) throws InterruptedException{
      Thread a = new Thread(new Test());
      a.start();
      System.out.print(“Begin”);
      a.join();
      System.out.print(“End”);
   }
  
   public void run(){
      System.out.print(“Run”);
   }
}

21. What will be output of the following program code?

public class Test implements Runnable{
   public void run(){
      System.out.print(“go”);
   }
  
   public static void main(String arg[]) {
      Thread t = new Thread(new Test());
      t.run();
      t.run();
      t.start();
   }
}

22. Given the code. What will be the result?

public class Test implements Runnable{
   public static void main(String[] args) throws InterruptedException{
      Thread a = new Thread(new Test());
      a.start();
    
      System.out.print(“Begin”);
      a.join();
      System.out.print(“End”);
   }
  
   public void run(){
      System.out.print(“Run”);
   }
}

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