Friday
April 18, 2014

Homework Help: Database

Posted by Frank on Tuesday, April 21, 2009 at 8:27am.

22. Which one of the following schedules has a conflict?
A) Sa: r1(X); r1(Y); r2(Z); r1(Z); w1(X); w1(Z)
B) Sb: r1(X); r2(X); r1(X); r1(Y); r2(X); w1(Y)
C) Sc: r1(Z); r2(X); w1(Z); r1(Y); w1(Z); w2(X)
D) both a and b

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