3 threads printing numbers of different range

Posted by user875036 on Programmers See other posts from Programmers or by user875036
Published on 2011-08-16T19:36:23Z Indexed on 2012/11/04 11:23 UTC
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multithreading

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concurrency

This question was asked in an Electronic Arts interview:

There are 3 threads. The first thread prints the numbers 1 to 10. The second thread prints the numbers 11 to 20. The third thread prints the numbers from from 21 to 30. Now, all three threads are running. The numbers are printed in an irregular order like 1, 11, 2, 21, 12 etc. If I want numbers to be printed in sorted order like 1, 2, 3, 4..., what should I do with these threads?

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