DBMS-Entity Relationship (E-R) Model

DBMS-Entity Relationship (E-R) Model
21. An entity type that is not existence-dependent on some other entity type is called a strong entity type
  • TRUE
  • FALSE
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22. An entity type that is not existence-dependent on some other entity type is called a strong entity type
  • TRUE
  • FALSE
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23. Weak entities are also referred to as child, dependent or subordinate entities.
  • TRUE
  • FALSE
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24. Anentity type can be an object with a physical existence but cannot be an object with a conceptual existence
  • TRUE
  • FALSE
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25. Simple attributes can be further divided.
  • TRUE
  • FALSE
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26. In an E-R diagram, the entity name is written in uppcase whereas the attribute name is written in lowercase letters.
  • TRUE
  • FALSE
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27. E-R Model was introduced by:
  • Dr. E.F. Codd
  • Boyce
  • P.P Chen
  • Chamberlain.
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28. E-R Model was introduced by:
  • Dr. E.F. Codd
  • Boyce
  • P.P. Chen
  • Chamberlain
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29. An association among three entities is called:
  • binary relationship.
  • ternary relationship
  • recursive relationship
  • none of these
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30. The association between the two entities is called.
  • binary relationship
  • ternary relationship
  • recursive relationship
  • none of these
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