The follow questions refer to the transaction schedule below, that records bookings of tickets for a harbour cruise. TIME ID TRANSACTION ID OPERATION 1 A Read Tickets left = 10 2 B Read Tickets left =...


The follow questions refer to the transaction schedule below, that records bookings of tickets for a harbour cruise.










































TIME ID



TRANSACTION ID



OPERATION



1



A



Read Tickets left = 10



2



B



Read Tickets left = 10



3



B



Purchase 8 Tickets



4



A



Purchase 6 Tickets



5







6









  1. Using the transaction schedule above, explain the lost update problem

  2. Using the transation schedule above, explain how the two-phase locking protocol would prevent the lost update from occurring



  • Using the transaction schedule above, explain the concept of Isolation as it relates to transaction management





Jun 03, 2022
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