back end testing  is nothing but data base testing

ur front end operation reflecting on aback end tables is
called is called back end testing

Back end Testing  means  DataBase Testing.
Normally a software product/application uses GUI front end 
for easyuser interaction.
The Data  entered in the front end will be stored in the 
back end database.
The data base may be oracle,MSSQL Server,MySQL,DB2...etc
The data will be organied in the tables as record.
Major aim of using database is to support the content of 
the page.
so it is critical and very important to check back end
or database.
Back end Testing means ensuring that,
    If you eneter data in the front end ,the data should 
    be stored properly in the back end.
    If you call that stored record fron front end it should 
    display porperly.
I think you have cleared with this ..

still if you have doubt mail me i can send you some more 
material for you.

byeeeeee friendz
rajendta_penumalli@yahoo.com
9885162742
Hyderabad

A back end is the engine of any client/server system. If 
the back end malfunctions, it may cause system deadlock, 
data corruption, data loss and bad performance. Many front 
ends log on to a single SQL server. A bug in a back end may 
put serious impact on the whole system. Too many bugs in a 
back end will cost tremendous resources to find and fix 
bugs and delay the system developments.

It is very likely that many tests in a front end only hit a 
small portion of a back end. Many bugs in a back end cannot 
be easily discovered without direct testing.

Back end testing has several advantages: The back end is no 
longer a "black box" to testers. Many bugs can be 
effectively found and fixed in the early development stage. 
Take Forecast LRS as an example; the number of bugs in a 
back end was more than 30% of total number of bugs in the 
project. When back end bugs are fixed, the system quality 
is dramatically increased.

A back end is an "end at the back" .,. LOLz