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DBMS Korth Edition 4 Exercise 16 Question 31 (Page No. 636)
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Give example schedules to show that if any of lookup, insert or delete do not lock the next key value, the phantom phenomenon could go undetected.
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DBMS Korth Edition 4 Exercise 16 Question 29 (Page No. 635)
Explain the reason for the use of degree-two consistency. What disadvantages dos this approach have ?
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DBMS Korth Edition 4 Exercise 16 Question 28 (Page No. 635)
Devise a timestamp-based protocol that avoids the phantom phenomenon.
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DBMS Korth Edition 4 Exercise 16 Question 27 (Page No. 635)
Explain the phantom phenomenon. Why may this phenomenon lead to an incorrect concurrent execution despite the use of the two-phase locking protocol ?
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DBMS Korth Edition 4 Exercise 16 Question 26 (Page No. 635)
Consider the timestamp ordering protocol, and two transactions, one that writes two data items p and q, and another that reads the same two data items. Give a schedule whereby the timestamp test for a write operation fails and ... but are unable to complete their task because of interaction with the other processes, is called a live lock.)
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