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The searching technique that takes O (1) time to find a data is

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The searching technique that takes O (1) time to find a data is

(a) Linear Search

(b) Binary Search

(c) Hashing

(d) Tree Search

This question was addressed to me in an internship interview.

Question is taken from Hashing techniques in chapter Indexing and Hashing of Database Management

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Best answer
Correct choice is (c) Hashing

To explain: A formula generates the hash, which helps to protect the security of the transmission from unauthorized users.

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