Database - Data Modeling

11. The method in which records are physically stored in a specified order according to a key field in each record is

  • Option : A
  • Explanation : A method in which records are physically stored in a specified order according to a key field in each record is hash.(In hash method,a hash function is performed on the key value to determine the unique physical address of the record to store or retrieve)
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12. A subschema expresses

  • Option : C
  • Explanation : A subschema expresses the external view. (External schemas are called also called as subschemas)
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