Thank you for your reply.
Here is the answer for the following mock exam. Someone might need it. https://suned.sun.com/secure/assessment/091.jsp
1.a 2.a 3.b 4.c 5.ac 6.a 7.a 8.d 9.c 10.a 11.ad 12.c 13.b 14.b 15.b 16.d
17.d 18.c 19.a 20.c 21.b 22.bd 23.ac 24.b 25.b 26.a 27.c 28.b 29.ab 30.c
During the first try, I didn't score that high. But I tried to figure out the correct answer and the reason. It is helpful for me to verify some misunderstood points and catch up some missed points.
And for the 270105_EJBJavaPersistence.pdf, I found it is very useful to review all the related points of JPA.
Hope it helps.
SCJP 5, SCWCD 1.4 SCBCD 5