Question

What is the main difference between Entity-Relationship Modeling and data modeling techniques before the 1970s?

a.

Entity-Relationship Modeling only deals with logical structure of data

b.

Data modeling techniques before the 1970s only dealt with implementation of data

c.

Entity-Relationship Modeling deals with both logical structure and implementation of data

d.

None of the above

Posted under Software Engineering

Answer: (a).Entity-Relationship Modeling only deals with logical structure of data Explanation:Entity-Relationship Modeling only deals with logical structure of data, whereas the data modeling techniques before the 1970s mixed up implementation concerns with the logical structure of the Unit of Data.

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Q. What is the main difference between Entity-Relationship Modeling and data modeling techniques before the 1970s?

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