Exam 1z0-809 topic 1 question 21 discussion

Actual exam question from Oracle's 1z0-809

Question #: 21
Topic #: 1

Given the code fragments:
class MyThread implements Runnable {
private static AtomicInteger count = new AtomicInteger (0);
public void run () {
int x = count.incrementAndGet();
System.out.print (x+" ");
}
}
and
Thread thread1 = new Thread(new MyThread());
Thread thread2 = new Thread(new MyThread());
Thread thread3 = new Thread(new MyThread());
Thread [] ta = {thread1, thread2, thread3};
for (int x= 0; x < 3; x++) {
ta[x].start();
}
Which statement is true?

A. The program prints 1 2 3 and the order is unpredictable.
B. The program prints 1 2 3.
C. The program prints 1 1 1.
D. A compilation error occurs.

Show Suggested Answer

Suggested Answer: A 🗳️

by Ritesh_ at Oct. 13, 2019, 10:55 a.m.

Comments

Submit Cancel

thetech

Highly Voted 5 years ago

A is correct answer. Tested.

upvoted 12 times

...

asdfjhfgjuaDCV

Most Recent 9 months, 4 weeks ago

A is the correct answer: import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main { public static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter GDP: "); int GDP = Integer.parseInt(br.readLine()); System.out.println("GDP entered: " + GDP); } }

upvoted 1 times

asdfjhfgjuaDCV

9 months, 4 weeks ago

Its for other question

upvoted 1 times

...

asdfjhfgjuaDCV

9 months, 4 weeks ago

A is the correct answer. import java.util.concurrent.atomic.AtomicInteger; class MyThread implements Runnable { private static AtomicInteger count = new AtomicInteger(0); public void run() { int x = count.incrementAndGet(); System.out.print(x + " "); } } public class Main { public static void main(String[] args) { Thread thread1 = new Thread(new MyThread()); Thread thread2 = new Thread(new MyThread()); Thread thread3 = new Thread(new MyThread()); Thread[] ta = { thread1, thread2, thread3 }; for (int x = 0; x < 3; x++) { ta[x].start(); } } }

upvoted 1 times

...