Relational Database Management System Mcqs

Page No. 38

The merge join can be used to compute


aNatural joins

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bEqui joins

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cBoth the mentioned

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d None of the mentioned

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View Answer Both the mentioned

If nested loop join is done on a per block basis rather than on a per tuple basis, it is called as


aEqui join

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bHash join

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cNested loop join

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dBlock nested loop join

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What type of join is this?


a Equi join

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b Hash join

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cNested loop join

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dBlock nested loop join

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View Answer Nested loop join

A join of the form r ⨝r.A=s.B s is called as


aEqui join

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bLeft outer join

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cRight outer join

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dFull outer join

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View Answer Equi join

Which of the following functions does an iterator not provide


a Open()

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bNext()

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cClose()

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dWait()

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View Answer Wait()

The usage of two buffers, with one continuing execution of the algorithm while the other is written is called as __________


a Double execution

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bMulti tasking

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cDouble buffering

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dDouble algorithm

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View Answer Double buffering

State true or false: Hybrid hash join is partially pipelined on the probe relation


aTrue

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bFalse

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ceither true of false

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dnone of these

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View Answer True

Which of the following techniques does not exist?


aPipelined join technique

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bLeft pipelined join technique

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c Right pipelined join technique

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d None of the mentioned

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State true or false: Join is an inherently blocking operation


aTrue

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bFalse

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ceither true of false

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dnone of these

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View Answer False

State true or false: Sorting is an inherently blocking operation


aTrue

✓


bFalse

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ceither true of false

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dnone of these

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View Answer True

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