About Question com.enthuware.ets.scjp.v6.1.813 :

[Francisco J. Bermejo]

In the correct answer you say that run() method is defined in Thread. But as a matter of fact run() is defined in the java.lang.Runnable interface.
Moreover, "synchronize" is not a keyword, the correct keyword is "synchronized".

[admin]

run() method is "declared" in Runnable but it is indeed "defined" in Thread class.

The typo with synchronized should be fixed asap.

thanks for reporting!

[Francisco J. Bermejo]

Yes, you're right! Thanks!