Which of the following symbols represent entity sets in an ER diagram?
(a) Divided rectangles
(b) Diamonds
(c) Lines
(d) Undivided rectangles
(a) Divided rectangles
(b) Diamonds
(c) Lines
(d) Undivided rectangles
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Correct choice is (a) Divided rectangles
Easy explanation: Rectangles divided into two parts represent entity sets in an ER diagram. The upper rectangle contains the name of the entity sets. And the lower rectangle contains the attributes.