Answer / bizz

Boundary Value Analysis (BVA): This is a testing technique
to validate a application by testing the boundary value
conditions. Lets take an example:
We have a edit field which accepts values from 1
to 100. By BVA, we can test this field using the invalid
and valid boundary values i.e. -1, 1 and 2 for the first
boundary and 99, 100 and 101 for the second boundary value.
Here the invalid conditions are -1 & 101 and the valid
conditions are 1,2 & 99,100.

Equivalence Patitioning or Equivalant Class Patitioning:
This is also a testing technique which divides the input
data into different classes and test the application by
selecting a value from each class. Lets take the same
example as above:
Here, the difference is that the 1-100 values
are divided into 4 classes i.e. 1-25, 25-50, 50-75 and 75-
100. Now, we select a value from each classes and test the
edit field.
The advantage of this technique is it can cover
a large dataset where we cannot manually go and check each
and every value.

Error Guessing: This technique is the most informal way of
testing a application. For using this technique, one need
to have a good command of the application and should know
the history of the application. As the name suggest, tester
have to guess where could be the possible defects by
keeping the defect history of the appliaction in mind.

Answer / naveen

TEST DESIGN TECHNIQUES:

While developing the test cases if at all the test engineer
feels complex in some areas to over come that complexity
usually the test engineer will use test design techniques.

Generally two types of techniques are used in most of the
companies.
1. Boundary Value Analysis (BVA).
2. Equivalence Class Partition (ECP).
1). Boundary Value Analysis (BVA).
When ever the engineers need to develop test cases for a
range kind of input then they will go for boundary value
analysis. Which describes to concentrate on the boundary of
the rang.
Usually they test with the following values.
LB-1 LB LB+1 MV UB-1 UB UB+1

2). Equivalence Class Partition (ECP).
When ever the test engineer need to develop test cases for a
feature which has more number of validation then one will go
for equableness class partition. Which describe first divide
the class of inputs and then prepare the test cases.

Answer / nitin verma

Boundary Value Analysis is the technique in which we test
the values just on the boundary,just above the boundary and
just minimum of the boundary.
For ex we have two values here x and y,now X could have the
values as a<=x<=b same for the Y also.

In the equivalance partitioning we break the inputs in the
different classes and we check whether testing on one class
is causing any effects on other classes to or not.

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