Search operation in static hashing is time consuming, but in
dynamic hashing it is not.
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Internal hashing mainly used for internal file, it is
particularly an array of records. External hashing used for file
disk
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Homomorphic Hashing is a algorithm technique used for verifying
data.
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If you read up on hashing, why hashing is done, what are its
uses. Then you will be able to answer your own question. More to
the point you will have studied the material that your homework
question is intended to make you study. It is educational.