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Equivalence partitioning divides inputs into classes such that
AEach class has only one specific input value
BEach class contains only invalid input data
CEach class contains only system output data
DEach class is handled the same by the system
Answer & Solution
Correct answer: D. Each class is handled the same by the system
EP groups inputs into partitions where the system should behave the same. One representative test per partition gives systematic coverage with manageable test counts. Valid AND invalid partitions are both tested.
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