Question: A server manages the objects a1, a2, ... an. The server provides two operations for its clients: read(i) returns the value of ai write(i, Value)

A server manages the objects a1, a2, ... an. The server provides two operations for its clients:

read(i) returns the value of ai

write(i, Value) assigns Value to ai

The transactions T and U are defined as follows:

T: x = read(i); write(j, 44); U: write(i, 55); write(j, 66);

(a) Describe an interleaving of the transactions T and U in which locks are released early with the effect that the interleaving is not serialized. (b) Describe an interleaving of the transactions T and U which is serialized and could occur with two-phase locking.

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