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What is an equivalence class

Answer Posted / d.radhika

E.C.P is equivalence class Partision.
Its one of the Block box testingteschnique.
In this the data can be devided into two different classes.
those are
1.valid
2.invalid
ex for valid data:
for ex user enter name with alphabets and 4 to 16 chracters
long
Then it allows only alphabets and 4 to 16.then only cond.
is pass
ex for invalid test:
if user enter name field <4 then test fail
if user enter name field >16 then also test fail
if user enter name with special character like ,.?
*&@...test fail
all these are invalid data

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