what is equivalence boundary

Answer Posted / ranjitha

Equivalence partitioning - The whole range of input is
split into set of equivalence classes, such that a single
value acts as a sample for each equivalence class.
Exhaustive testing is not required in this case.

This technique consists of developing test cases and data
that focus on the input and output boundaries of a given
function as these are more prone to errors.

Example: A program needs to be tested with input range from
1000 to 2000. Boundary analysis will have the following
boundary values to be tested.

Lower boundary: (999 and 1001)
Upper boundary: (1999 and 2001)
On the boundary: (1000 and 2000)

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What is meant by Boundary value analisis and Equalence partitioning? Can give derive this using these methods? In a system designed to work out the tax to be paid: An employee has £4000 of salary tax free. The next £1500 is taxed at 10% The next £28000 is taxed at 22% Any further amount is taxed at 40% Which of these groups of numbers would fall into the same equivalence class? a) £4800; £14000; £28000 b) £5200; £5500; £28000 c) £28001; £32000; £35000 d) £5800; £28000; £32000

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