Relational Database Management System Mcqs

Page No. 38

The merge join can be used to compute


aNatural joins


bEqui joins


cBoth the mentioned


d None of the mentioned


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


bHash join


cNested loop join


dBlock nested loop join



What type of join is this?


a Equi join


b Hash join


cNested loop join


dBlock nested loop join


View Answer Nested loop join

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


aEqui join


bLeft outer join


cRight outer join


dFull outer join


View Answer Equi join

Which of the following functions does an iterator not provide


a Open()


bNext()


cClose()


dWait()


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


bMulti tasking


cDouble buffering


dDouble algorithm


View Answer Double buffering

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


aTrue


bFalse


ceither true of false


dnone of these


View Answer True

Which of the following techniques does not exist?


aPipelined join technique


bLeft pipelined join technique


c Right pipelined join technique


d None of the mentioned



State true or false: Join is an inherently blocking operation


aTrue


bFalse


ceither true of false


dnone of these


View Answer False

State true or false: Sorting is an inherently blocking operation


aTrue


bFalse


ceither true of false


dnone of these


View Answer True

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