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Importance of Legacy System question in exam

 
Ankush Deshmukh
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can anybody emphasise on the importance of legacy system topic with respect to exam and how to prepare for this topic
 
Raj Mohan
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I am also looking for the same. I even tried searching the net. But could not find anything useful.
if anybody can help us.
 
Anil Vupputuri
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Sun's JCEA on Legacy Connectivity objective is..
Distinguish appropriate from inappropriate techniques for providing access to a legacy system from Java code given an outline description of that legacy system.

State the advantages and disadvantages of object mapping for legacy system access.
Advantage is object technology throughout the architecture, but disadvantage is that you have to write the wrapper code.

Recommend a migration strategy for an existing application.

Either migrate applications or use screen scraping. Migrate where possible, especially if the legacy applications are hard to maintain, have a lot of new requirements, have swiftly evolving requirements etc.
and Links are...
http://java.sun.com/features/1997/oct/legacy.html

http://developer.java.sun.com/developer/technicalArticles/ThirdParty/Enterprise/

http://developer.netscape.com/viewsource/morin_corba/morin_corba.html

http://www.cs.umu.se/~hed/java/ch32.htm

http://www.cobol2java.com/

http://www.cs.umu.se/~hed/java/ch33.htm

http://www-106.ibm.com/developerworks/library/tip-leg.html?dwzone=components

http://www.taxon.demon.nl/JW/jwback.html

www.taxon.demon.nl/JW/javawoman.html

these are all references on legacy systems with Java.
Anil
 
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