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

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Showing 10 of 38 questions
Q21
An entity type that is not existence-dependent on some other entity type is called a strong entity type
  • A TRUE
  • B FALSE
Answer: Option A
Q22
An entity type that is not existence-dependent on some other entity type is called a strong entity type
  • A TRUE
  • B FALSE
Answer: Option A
Q23
Weak entities are also referred to as child, dependent or subordinate entities.
  • A TRUE
  • B FALSE
Answer: Option A
Q24
Anentity type can be an object with a physical existence but cannot be an object with a conceptual existence
  • A TRUE
  • B FALSE
Answer: Option B
Q25
Simple attributes can be further divided.
  • A TRUE
  • B FALSE
Answer: Option B
Q26
In an E-R diagram, the entity name is written in uppcase whereas the attribute name is written in lowercase letters.
  • A TRUE
  • B FALSE
Answer: Option B
Q27
E-R Model was introduced by:
  • A Dr. E.F. Codd
  • B Boyce
  • C P.P Chen
  • D Chamberlain.
Answer: Option C
Q28
E-R Model was introduced by:
  • A Dr. E.F. Codd
  • B Boyce
  • C P.P. Chen
  • D Chamberlain
Answer: Option C
Q29
An association among three entities is called:
  • A binary relationship.
  • B ternary relationship
  • C recursive relationship
  • D none of these
Answer: Option D
Q30
The association between the two entities is called.
  • A binary relationship
  • B ternary relationship
  • C recursive relationship
  • D none of these
Answer: Option A

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