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Attribute of one table matching to the primary key of other table, is called as

  • foreign key
  • secondary key
  • candidate key
  • composite key
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1. Allocation map

  • Used to store program data
  • specifies which blocks are used by which file
  • is updated by application programs
  • allow programs to erase files

2. Attribute of one table matching to the primary key of other table, is called as

  • foreign key
  • secondary key
  • candidate key
  • composite key

3. Transaction processing was made possible by the development of

  • direct access storage
  • magnetic tape
  • cash register input
  • minicomputers

4. In order to use a DBMS, it is important to understand

  • the physical schema
  • all subschemas
  • one sub schema
  • none of above

5. Embedded pointer provides

  • a secondary access path
  • a physical record key
  • an inverted index
  • all of above
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