Important websites

http://www.oracle-base.com/articles/11g/plsql-new-features-and-enhancements-11gr1.php

http://sbhoracle.wordpress.com/2011/11/06/plscope-and-plsql-hierarchical-profiler-in-oracle-11g/

http://technology.amis.nl/2007/11/14/oracle-11g-generating-plsql-compiler-warnings-java-style-using-plscope/

For more information see:

• What's New in PL/SQL? - Oracle Database PL/SQL Language Reference 11g Release 1 (11.1)
• Oracle Database PL/SQL Packages and Types Reference 11g Release 1 (11.1)

Explore about: 

Streams

Materialized views

New PL/SQL Features for 11g Release 1 (11.1)

http://docs.oracle.com/cd/B28359_01/appdev.111/b28370/whatsnew.htm#CJAEGHHH

http://www.exforsys.com/tutorials/oracle-11g/plsql-scope-plsql-hierarchical-profiler.html

http://www.exforsys.com/tutorials/oracle-11g/oracle-analytic-enhancements.html#nth_value_function

http://www.club-oracle.com/

Buy book
Oracle Advanced PL/SQL Developer Professional Guide(Link)

Packt Publishing

http://www.oracle-developer.net/11g.php

http://www.toadworld.com/KNOWLEDGE/KnowledgeXpertforOracle/tabid/648/TopicID/OTNN41/Default.aspx

3/13/2013

http://www.gcreddy.com/2012/12/oracle-interview-questions.html#.UUEECdaG2Sp
http://www.aboutoracleapps.com/2008/07/oracle-financials-interview-question.html
http://www.shareoracleapps.com/search/label/AP
http://www.shareoracleapps.com/p/video-tutorials.html

http://www.orafaq.com/tuningguide/

http://zerotoprotraining.com

http://www.cathycakebread.com/papers/papers.html

http://imdjkoch.wordpress.com/category/oracle/oracle-technologies/oa-framework/
http://bhaskarreddyapps.blogspot.com/

http://dillipkumarjena.blogspot.com/2012/09/real-time-interview-question-with.html
http://prasanthapps.blogspot.com/2011/06/oracle-receivables-transaction-types.html
http://oracle-applications-forall.blogspot.com/p/account-receivables.html

http://oracleapps4u.com/wp/interview-qa/

http://kranthijuvva.blogspot.com/?view=classic