A directory of Objective Type Questions covering all the Computer Science subjects. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews.

301. We indicate roles in E-R diagrams by labeling the lines that connect ___________ to __________
a. Diamond , diamond
b. Rectangle, diamond
c. Rectangle, rectangle
d. Diamond, rectangle
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Answer: (d).Diamond, rectangle

302. An entity set that does not have sufficient attributes to form a primary key is termed a __________
a. Strong entity set
b. Variant set
c. Weak entity set
d. Variable set
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Answer: (c).Weak entity set

303. For a weak entity set to be meaningful, it must be associated with another entity set, called the
a. Identifying set
b. Owner set
c. Neighbour set
d. Strong entity set
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Answer: (a).Identifying set