Question 21Asked in DSSSB TGT Computer Science (Technical), 7 Aug 2021, Shift 3

Which of the following is oldest database model?

ADeductive
BRelational
CObject-Oriented
DHierarchical

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Correct answer: (D) Hierarchical

Explanation

The hierarchical model (e.g. IBM's IMS, 1960s) is the oldest of these. The relational model came in 1970, and the object-oriented and deductive models later.

From DSSSB TGT Computer Science PYQ (Technical), 7 Aug 2021, Shift 3

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