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GATE | GATE-CS-2014-(Set-2) | Question 65
Consider a join (relation algebra) between relations r(R)and s(S) using the nested loop method. There are 3 buffers each of size equal to disk block size, out of which one buffer is reserved for intermediate results. Assuming size(r(R)) < size(s(S)), the join will have fewer number of disk block accesses if
(A)
relation r(R) is in the outer loop.
(B)
relation s(S) is in the outer loop.
(C)
join selection factor between r(R) and s(S) is more than 0.5.
(D)
join selection factor between r(R) and s(S) is less than 0.5.
Answer
Please comment below if you find anything wrong in the above post
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