DBMS-Entity Relationship (E-R) Model Questions and Answers

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Showing 10 of 38 questions
Q11
The participation is optional if an entity's existence requires the existence of an associated entity in a particular relationship.
  • A TRUE
  • B FALSE
Answer: Option A
Q12
An entity type does not have an independent existence
  • A TRUE
  • B FALSE
Answer: Option B
Q13
An attribute is viewed as the atomic real world item.
  • A TRUE
  • B FALSE
Answer: Option A
Q14
Domains can be composed of more than one domain.
  • A TRUE
  • B FALSE
Answer: Option A
Q15
The degree of a relationship is the number of entities associated or participants in the relationship.
  • A TRUE
  • B FALSE
Answer: Option A
Q16
The connectivity of a relationship describes a constraint on the mapping of the associated entity occurrences in the relationship.
  • A TRUE
  • B FALSE
Answer: Option A
Q17
In case of mandatory existence, the occurrence of that entity need not exist.
  • A TRUE
  • B FALSE
Answer: Option B
Q18
An attribute is property of an entity or a relationship type.
  • A TRUE
  • B FALSE
Answer: Option A
Q19
In E-R diagram, if the attribute is simple or single-valued then they are connected using a single line.
  • A TRUE
  • B FALSE
Answer: Option A
Q20
In E-R diagram, if the attribute is derived then they are connected using double line.
  • A TRUE
  • B FALSE
Answer: Option B

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