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A model developed by Hammer and Mc Leod in 1981.

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A model developed by Hammer and Mc Leod in 1981.

(a) SDM

(b) OODBM

(c) DDM

(d) RDM

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I need to ask this question from DBMS topic in chapter Application Software Packages & Business Data Processing of Computer Fundamentals

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Right option is (a) SDM

To explain: SDM stands for Semantic Data Model. It models both data and their relationships in a single structure.

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