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Transaction isolation levels:

3.1) Consider the following Account table

Assume the following two transactions are submitted:

T1: adds $1000 to account 1

T2: makes account 2 balance equals to account 1 balance

a) What are the final database contents for each of the following possible scenarios

b) What are the final database contents after executing the following schedule for each of the following isolation levels? Explain why or why not the two isolation levels results in different final values in the database.

accNum

bal

1

1000

2

0

 

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