Related Questions

Consider the following schedule S of transactions T1, T2, T3, T4: T1 T2 T3 T4   Reads(X)         Writes(X) Commit   Writes(X)  Commit         Writes(Y) Reads(Z) Commit           Reads(X) Reads(Y) Commit   Which one of the following statements is CORRECT?
The letters P, Q, R, S, T and U are to be placed one per vertex on a regular convex hexagon, but not necessarily in the same order. Consider the following statements: The line segment joining R and S is longer than the line segment joining P and Q. The line segment joining R and S is perpendicular to the line segment joining P and Q. The line segment joining R and U is parallel to the line segment joining T and Q. Based on the above statements, which one of the following options is CORRECT?