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

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

Question 1 options:

void run()

public void run()

public void start()

None of the above

Question 2 (1 point)

What will be the output of the following Java code?

package com.algonquin.quiz3;
class ThreadDemo extends Thread {
public static void main(String [] args) {
ThreadDemo t = new ThreadDemo();
t.start();
System.out.print(“one. “);
t.start();
System.out.print(“two. “);
}
public void run() {
System.out.print(“Thread “);
}
}

Question 2 options:

The output cannot be determined.

It prints “Thread one. Thread two.”.

An exception occurs at runtime.

Compilation fails.

Question 3 (1 point)

Which of the following lines of code is suitable to start a thread?

class Demo implements Runnable {
public void run() {
System.out.println(“Thread is in Running state”);
}
public static void main(String args[]) {
/* Missing code? */
}
}

Question 3 options:

Thread t = new Thread();
x.run();
Thread t = new Thread(X);
t.start();
X obj = new X();
Thread tobj = new Thread(obj);
tobj.start();
Thread t = new Thread(X);

Question 4 (1 point)

What will be the output of the below Java program?

package com.algonquin.quiz3;
class MyThread extends Thread {
MyThread() {}
MyThread(Runnable r) {super(r); }
public void run() {
System.out.print(“Inside Thread “);
}
}
class RunnableDemo implements Runnable {
public void run() {
System.out.print(” Inside Runnable”);
}
}
class ThreadDemo {
public static void main(String[] args) {
new MyThread().start();
new MyThread(new RunnableDemo()).start();
}
}

Question 4 options:

Throws exception at runtime.

Prints “Inside Thread Inside Runnable”.

Prints “Inside Thread Inside Thread”.

Does not compile.

Question 5 (1 point)

What is the name of the method that is used to start the execution of a thread?

Question 5 options:

init();

resume();

start();

run();

Question 6 (1 point)

What is the output of the following program?

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 static void main(String args[]) { ThreadTest t1 = new ThreadTest(); ThreadDemo t2 = new ThreadDemo(); t1.start(); t2.start(); } } Question 6 options: Will print in this order ABCD...ABCD... 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... Compile time Error There is no start() method. Question 7 (1 point) Which of the following methods cannot directly cause a thread to stop executing? Question 7 options: Calling the SetPriority() method on a Thread object. Calling the wait() method on an object. Calling sleep() method on a Thread object. Calling notify() method on an object. Question 8 (1 point) What will be the output of the below Java program? public class ThreadWaitTest { public static void main(String [] args) { System.out.print("1 "); synchronized(args) { System.out.print("2 "); try { args.wait(); /* Line 11 */ } catch(InterruptedException e) { } } System.out.print("3 "); } } Question 8 options: 1 3 1 2 3 1 2 d. It fails to compile because the IllegalMonitorStateException of wait() is not dealt with in line 11. Question 9 (1 point) What will be the output of the following Java program? package com.algonquin.quiz3; class MyThread extends Thread { MyThread() { System.out.print(" MyThread"); } public void run() { System.out.print(" bar"); } public void run(String s) { System.out.println(" baz"); } } public class ThreadDemo { public static void main (String [] args) { Thread t = new MyThread() { public void run() { System.out.println(" foo"); } }; t.start(); } } Question 9 options: foo bar MyThread bar MyThread foo foo Question 10 (1 point) Assume the following method is properly synchronized and called from a thread A on an object B: wait(2000); After calling this method, when will the thread A become a candidate to get another turn at the CPU? Question 10 options: After thread A is notified, or after two seconds. After the lock on B is released, or after two seconds. Two seconds after thread A is notified. Two seconds after lock B is released.