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5. The user of this class expected the output “Num: 1000000”. They got something else. What went wrong and how would you fix it? public class Test { public final static int NUMTHREADS = 1000; public final static int NUMLOOP = 1000; public static int num = 0; static class Mythread extends Thread { @Override public void run() { for (int i = 0; i < NUMLOOP; i++) { ++num; } } } public static void main(String argv[]) { Mythread threads[] = new Mythread[NUMTHREADS]; for (int i = 0; i < NUMTHREADS; ++i) { threads[i] = new Mythread(); threads[i].start(); } try { for (int i = 0; i < NUMTHREADS; ++i) { threads[i].join(); } } catch (InterruptedException e) { } System.out.println("Num: " + num); } }
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Java Engineer

Interviewed at Nextlabs

3.8★
Jan 12, 2012

5. The user of this class expected the output “Num: 1000000”. They got something else. What went wrong and how would you fix it? public class Test { public final static int NUMTHREADS = 1000; public final static int NUMLOOP = 1000; public static int num = 0; static class Mythread extends Thread { @Override public void run() { for (int i = 0; i < NUMLOOP; i++) { ++num; } } } public static void main(String argv[]) { Mythread threads[] = new Mythread[NUMTHREADS]; for (int i = 0; i < NUMTHREADS; ++i) { threads[i] = new Mythread(); threads[i].start(); } try { for (int i = 0; i < NUMTHREADS; ++i) { threads[i].join(); } } catch (InterruptedException e) { } System.out.println("Num: " + num); } }

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