Consider the following two transactions: T 31 : read (A); read (B); If A = 0 then B: = B + 1; write (B). T 32 : read (B); read (A); If B = 0 then A: = A + 1; write (A). Add lock and unlock instructions to transactions T 31 and T 32 , so that they observe
Consider the following two transactions:
T31: read (A); read (B);
If A = 0 then B: = B + 1; write (B).
T32: read (B); read (A);
If B = 0 then A: = A + 1; write (A).
Add lock and unlock instructions to transactions T31 and T32, so that they observe the two-phase locking protocol. Can the execution of these transactions result in a deadlock?
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a. Lock and unlock instructions: T 31 : lock-S (A) Read (A) Lock-X (B) Read (B…View the full answer
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