Database Management Systems (DBMS) GTU Chapter 2 Quiz
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Questions and Answers

What is the cost of linear search in the best case scenario?

  • (br * 2)
  • (br - 2)
  • (br / 2) (correct)
  • (2br)

    • When can linear search be applied according to the text?

  • Only if the selection is on the primary key attribute
  • When selection condition involves multiple comparisons
  • Only if the file is sorted on the primary key attribute
  • Regardless of selection condition or ordering of records (correct)

    • What is the cost of binary search as per the text?

  • [log(br) / 2]
  • [br / log2]
  • [log2(br)] (correct)
  • [log(br)]

    • In which scenario is binary search generally used?

    <p>When selection is an equality comparison on the primary key attribute and the file is ordered on the primary key attribute</p> Signup and view all the answers

    How do we evaluate expressions with multiple operations according to the text?

    <p>By evaluating each operation one by one in appropriate order</p> Signup and view all the answers

    What does 'br' represent in the context of cost calculation?

    <p>Number of blocks containing records from relation r</p> Signup and view all the answers

    Which search algorithm is faster between linear search and binary search?

    <p>Binary search</p> Signup and view all the answers

    What method is used for evaluating expressions with multiple operations from bottom to top?

    <p><em>Pipelining</em></p> Signup and view all the answers

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