DataBase Management System

DataBase Management System RDBMS

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Q: A ________ is a pictorial depiction of the schema of a database that shows the relations in the database, their attributes, and primary keys and foreign keys.  

  • A Schema diagram
  • B Relational algebra
  • C Database diagram
  • D Schema flow
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Q 1: The main source of water pollution is

  • ASewage water
  • BAcid rain
  • CIndustrial pollutants
  • DNone of the above

Q 2: Which of the following is a non-point source of water pollution?

  • AOil spill
  • BSewage treatment plant
  • COpen cast mine
  • DDeep bore well

Q 3: BOD stands for

  • ABiological oxygen demand
  • BBasic oxygen dissolved
  • CBiological organic demand
  • DBiological oxygen decomposition

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