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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       Using the transaction schedule above, explain the lost update problem  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

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       Using the transaction schedule above, explain the lost update problem  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

Database Systems: Design, Implementation, & Management
Database Systems: Design, Implementation, & Management
11th Edition
ISBN:9781285196145
Author:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Publisher:Steven, Steven Morris, Carlos Coronel, Carlos, Coronel, Carlos; Morris, Carlos Coronel and Steven Morris, Carlos Coronel; Steven Morris, Steven Morris; Carlos Coronel
Chapter10: Transaction Management And Concurrency Control
Section: Chapter Questions
Problem 1P
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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 

 

 

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