Draw a precedence graph for each of the schedules (a) (e) in the previous exercise. (a)
Question:
(a) Read(T1, balx), read(T2, balx), write(T1, balx), write(T2, balx), commit(T1), commit(T2)
(b) Read(T1, balx), read(T2, baly), write(T3, balx), read(T2, balx), read(T1, baly), commit(T1), commit(T2)
(c) Read(T1, balx), write(T2, balx), write(T1, balx), abort(T2), commit(T1)
(d) Write(T1, balx), read(T2, balx), write(T1, balx), commit(T2), abort(T1)
(e) read(T1, balx), write(T2, balx), write(T1, balx), read(T3, balx), commit(T1), commit(T2), commit(T3)
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a Cycle so not serializable b No cycle so serializable c Without ...View the full answer
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Related Book For 
Database Systems A Practical Approach to Design Implementation and Management
ISBN: 978-0132943260
6th Edition Global
Authors: Thomas Connolly, Carolyn Begg
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