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Bloom Filter
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1) A Bloom filter is a space-efficient probabilistic data structure that is used to test whether an element is a member of a set | |
For example, checking availability of username is set membership problem, where the set is the list of all registered username. | |
The price we pay for efficiency is that it is probabilistic in nature that means, there might be some False Positive results. | |
False positive means, it might tell that given username is already taken but actually it’s not. | |
2) The base data structure of a Bloom filter is a Bit Vector |
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