Which of the following shapes is used in ER diagram to represent weak entity?
2016
Which of the following shapes is used in ER diagram to represent weak entity?
Answer: C. Rectangle (double solid line) — a Rectangle (double solid line) is used to represent a weak entity in an ER diagram. Weak entities do not possess a primary key of their own and depend on a…
- A.
Oval (solid line)
- B.
Oval (dashed line)
- C.
Rectangle (double solid line)
- D.
Rectangle (single solid line)
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Correct answer: C
a Rectangle (double solid line) is used to represent a weak entity in an ER diagram. Weak entities do not possess a primary key of their own and depend on a strong owner entity, which is structurally denoted by a double-lined rectangle. Therefore, Option C is correct.
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