Exercise 16.2 Consider the following actions taken by transaction T1 on database objects X and Y:
R(X), W(X), R(Y), W(Y)
1. Give an example of another transaction T2 that, if run concurrently to transaction T without some form of concurrency control, could interfere with T1.
2. Explain how the use of Strict 2PL would prevent interference between the two transactions.
3. Strict 2PL is used in many database systems. Give two reasons for its popularity.
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