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 the two phase locking protocol Can the execution of these transactions result in a deadlock

Question: Consider the following two transactions: T 31 : read (A); read (B); If A = 0 then B: = B + 1; write (B). T

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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