a) Parent-Child relation ship between the tables that connect them b) Many ...
View QuestionKey to represent relationship between tables is called
a) Primary key b) Secondary Key c) Foreign Key d) None of the mentioned Answer: c Explanation: Primary ...
View QuestionWhich of the following is a low level operator?
a) Insert b) Update c) Delete d) Directory Answer: d Explanation: ...
View QuestionWhat is a relationship called when it is maintained between two entities?
a) Unary b) Binary c) Ternary d) Quaternary Answer: b Explanation: Binary word ...
View QuestionIn E-R diagram generalization is represented by
a) Ellipse b) Dashed ellipse c) Rectangle d) Triangle Answer: d Explanation: Ellipse represents attributes, ...
View QuestionWhich of the following indicates the maximum number of entities that can be involved in a relationship?
a) Minimum cardinality b) Maximum cardinality c) ERD d) Greater Entity Count Answer: ...
View QuestionGiven the basic ER and relational models, which of the following is incorrect?
a) An attribute of an entity can have more than one value b) An attribute of an entity ...
View QuestionThe total participation by entities is represented in E-R diagram as
a) Dashed line b) Double line c) Double rectangle d) Circle Answer: b Explanation: ...
View QuestionLet us consider phone_number ,which can take single or several values . Treating phone_numberas an _________ permits instructors to have several phone numbers (including zero) associated with them.
a) Entity b) Attribute c) Relation d) Value Answer: a Explanation: Treating a phone as ...
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