Chapter 9, Problem 43CRP

Explanation of Solution

Incorrect information in the schedule of transactions $\text{T}1$ and $\text{T2}$:

• The sequence of transaction is:
  • Transaction $\text{T}1$ retrieves the balance of account A.
  • Transaction $\text{T2}$ transfers $\$100$ from account A to account B.
  • Transaction $\text{T}1$ retrieves the balance of account B and reports the sum.
• The step (ii) adds the amount of $\$100$ to account B.
• When step (iii) retrieves the value of B, it is not true value but the value of B after addition of $\$100$