Answer / vijay

to increase web application performance caching is used,
caching may be categorised-output cahce,partial page or
data cahing.
<@outputcache duration="60" (in min) varyby param=q1;q1)
<@outputcache duration="60" (in min) varyby
control=dropdownlist1)

partial page -when a portion of page is to be keep track in
server memory for reusability frequently

data cahcing-
cache["dscache"]=ds //storing dataset inot cache
dataset objds=new dataset();
objds=(dataset)cache["dscache"] //to get into object dataset

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