Changen Li

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since Feb 27, 2001
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Recent posts by Changen Li

Hi, there
I just installed Oracle 8i Lite(4.0.0.2.0) and JDeveloper (3.1.1.2) on my PC. Now I got two problems.
1. When I try to use Oracle Net8 Easy Config, I got following message:
"Comment information has been detected in your Network Configuration files which may be lost or repositioned when you save your Network Configuration. Do you wish to continue?"
What does it mean?
2. I can connect the default database with userID: system, Passwd: manager and Host String: ODBA:POLITE. But I cannot create user in it. How can I make a connection without using ODBC?

Thanks
changen
Darsh
I am interested in the oracle Jdeveloper test. But I didn't find the recommanded books and sample test from the oracle website. Could you please give me some advice on how to prepare the test? Any book to read besides playing around the IDE? Also, oracle provides two test for Jdeveloper, what is the difference?
Thanks
changen
I don't think the sample test covers everything. You need to check the test objectives at the IBM website and try to find the answers from the book. The sample test illustrates the mapping from the test objectives to the real test.

Hope it would help

changen
Hi, guys
I took the exam on Saturday and passed by 88%. I cannot remember the breakdowns of the score because I lost the report. Here is my a little experience to share.
To prepare the exam, what I have done is
1. Read "UML distilled" twice
2. Gone through the other book once. (I forgot the exact title and author of the book since I had returned it to the library. should be something like "apply UML and pattern". You guys know it)
3. Preassignment test is very useful. Don't take the exam before you get at least 80% in preassignment test. (I got 93%)
4. This newsgroup is very helpful since it provides almost all answers to the sample test.
As to the exam itself. basically, what kosaic (http://www.javaranch.com/ubb/Forum9/HTML/000561.html) discovered about this exam is very true. I just add something to some of his observations from the positive point of view.
1." Some of the diagrams were not even legible". Better believe it. Anyway, I found those illegible parts can be safely ignored. So I think it is the way that IBM is trying to help us pass the exam quickly.
2. "Not all of the multiple answer questions tell you how many to choose. Several said choose all that apply" Please read this as "all are correct". We found such questions in sample test that it told you all answers were correct. But I think it is rational for IBM to act implicitly in the real exam.
3. "2 or 3 of the questions didnt even make logical." Forgive them. this is to keep people from 100%. Anybody know a 100% guy?
4: "pretty much the same class diagram was used everywhere and generally the questions only pertained to a few of the classes on it." TRUE.
5: "Exibits , I would safely say 60-70% of the questions required you to use exibits. Some questions even had upto 3 seperate exibits." TRUE.
6: "time wasnt a factor." TRUE.

One additional point. I was frustrated by the lady at test center. Obviously she was upset because I disrupted her endless sweet phone conversation. After hang up the phone, she just kicked up the door of a room and pointed me to a wretched computer and left without looking at me. The 14" monitor and the stolidly mouse that she gave me made the exam less pleasant. So, be sweet to ladies, always.
I am going to a long holiday from tomorrow, and will continue to oracle Jdevelpor test after I come back. Anybody know a forum for oracle test that is as good as this one? (Forgive me for this off-topic)
Good Luck
changen
Hi, there
Here is the question:
Referring to the diagram in Figure Interface, which of the following are true?

a) Classes "X" and "Y" are subclasses of Mortgageable.

b) Instances of "X" and "Y" can be passed as parameters declared as type Mortgageable.

c) "X" and "Y" must implement a getAppraisedValue() method.

d) There are instances of Mortgageable in the production system.

B is definitely correct. Since X and Y are not italic, should the answer be C? Anyone got 100%?
http://certify.torolab.ibm.com/figures/test486F13.gif
Thanks
30: a,d
26: c,d
9: c,d
Regards
[This message has been edited by Changen Li (edited August 13, 2001).]
Thanks. I think the acknowledge could be a return from log method. is it correct?
This question has been discussed in this forum. I bring it up here again because I am not convinced by the agreed answer, which seems to be A. I think it should be C. Any comments? Anyone who got 100% can tell us the correct answer?

Referring to the sequence diagram in Figure Interaction, what methods MUST be implemented by the Account class?
a) withdraw, checkBalance
b) withdraw, log, checkBalance
c) withdraw, checkBalance, acknowledge
d) withdraw, acknowledge

( http://certify.torolab.ibm.com/figures/test486F15.gif )
Here is my understanding: Identify classes from and draw class diagram for each user case. Draw sequence diagram based on the identified classes. Am I correct?
Shall we identify classes from sequence diagram too?
Given the design manner described in the textbook, I wonder anyone has really followed those steps. I am not saying that those steps are not good. But can anybody who thinks UML great helpful in the real world design give us some practical, not necessarily aesthetic perfect manners?
Regards
I passed SCJP onw year ago. Can I take SCEJA directly? or I need to get the developer certificate first?
Thanks
Changen Li
I tried using UML with rational rose in my last project. It seems to me that sequence diagram is more useful than the use case diagram. In fact, I don't know what is the point to draw use cases diagram in the first place. I have to create the sequence diagrams from the scratch even though I had the use case diagrams already. Am I correct?
Regards