Not cleared

[chetna_jain]

i appeared for jcp exam on 12 but just got 57%. i am planning appear again next month. so i want to strenghten my weak points. i scored 0 in garbage collection,14 in operators ans assignments, 25% in awt package,42% in threads,57% in flow control and exceptions handling,50% in util package,71% in overloading,Overriding,runtime type and object orientations,77% in language fundamentals,80% in io package,100% in declarations and access control.
so pls help me out if any specific material i can read in which i have scored bad.
thanx in advance

[peter parker]

Chetna,
I would suggest JQ+. It's worth the $20! Also, I would make sure
you spend a week writing small sample codes on IO and Thread.
-PP

[Timothy Stone]

There is only one question on Garbage Collection, so it's all or nothing.
RHE, at best, glosses over Garbage Collection, leaving the student with the idea that "you can't force garbage collection" being the only objective of the exam. Wrong. You MUST know when objects are available for collection...
Example:

1. public class TestGC {
2.   public static void main( String[] args ) {
3.     String msg;
4.     String pre = "This program was called with ";
5.     String post = " as the first argument.";
6.     String arg1 = new String(( args.length > 0 ) ?
                     "'" + args[0] + "'" : "<no arg>");
7.     msg = arg1;
8.     arg1 = null;
9.     msg = pre + msg + post;
10.    pre = null;
11.    System.out.println(msg);
12.    msg = null;
13.    post = null;
14.    args = null;
15.  }
16.}

Where is the object initially referenced by arg1 eligible for collection?
*After* line 9. The key is that msg holds a reference to arg1. When arg1 is nulled on line 8, it can't be GC'd because of this reference. Only on line 9 is this reference replaced with a new String by concat'ing the other Strings.
Hope this helps.
Tim

[Eugen Catrin]

Hi
I am an OCP (Oracle DBA & Developer certified) and now I am looking to get SCJP exam.
Can u help me to find from where can I get JQ+ question, and advise me with some helpful resource go get my target, please?
I am can be very useful to share my experience in Oracle exams too
Wish you the best,
EC, [e-mail]

[shailesh sonavadekar]

i think there is duplication of the thread , so I am closing this thread. Don't loose heart chetna. You will come with flying colors next time. work on you mistakes. take this as learning & developing opportunity. One more thing. This is not the end & not the only exam. Life is the most toughest exam.
I hope It will be helpful in some way to you.

Shailesh.