Multithreading

What will happen if two thread of the same priority are called to be processed simultaneously?

• Anyone will be executed first lexographically

• Both of them will be executed simultaneously

• None of them will be executed

• It is dependent on the operating system

What is the priority of the thread in the following Java Program?

class multithreaded_programing

{

public static void main(String args[])

{

Thread t = Thread.currentThread(); System.out.println(t);

} }

• 4

• 5

• 0

• 1

Deadlock is a situation when thread is waiting for other thread to release acquired object.

• True

• False

Which of these keywords are used to implement synchronization?

• synchronize

• syn

• synch

• synchronized

Which of these method is used to tell the calling thread to give up a monitor and go to sleep until some other thread enters the same monitor?

• wait()

• notify()

• notifyAll()

• sleep()

What is synchronization in reference to a thread?

• It’s a process of handling situations when two or more threads need access to a shared resource

• It’s a process by which many thread are able to access same shared resource simultaneously

• It’s a process by which a method is able to access many different threads simultaneously

• It’s a method that allow too many threads to access any information the require

synchronized instance methods acquire lock on

• object

• class

• all

• none

What will be the output of the program?

class Test implements Runnable {

public

void run()

{

System.out.println("Run");

}

} class Myclass {

public

static void main(String[] args)

{

Thread t1 = new Thread();

t1.start();

System.out.println("Main");

}

}

• Run

• Main

• Compile Time Error

• Run Main

What will be the output of the following?

class ThreadTest extends Thread

{

public void run()

{

for(int i = 0; i < 3; i++)

{

System.out.println("A");

System.out.println("B");

}

}

}

class ThreadDemo extends Thread

{

public void run()

{

for(int i = 0; i < 3; i++)

{

System.out.println("C");

System.out.println("D");

}

}

}

public class Simple{

public static void main(String args[])

{

ThreadTest t1 = new ThreadTest();

ThreadDemo t2 = new ThreadDemo();

t1.start();

t2.start();

}

}

• Will print in this order ABCD...ABCD...

• Compile time Error There is no start() method.

• Will print A B C D but we cannot predict the Order in which this will be printed.

• Will print in this order AB CD AB...

• None of these.

Which method must be defined by a class implementing the java.lang.Runnable interface?

• public void start()

• public void run()

• void run()

• None of these