You have the choice of running a single transaction to transfer |S300 from one of your savings accounts to another savings account at the same bank or of running two transactions, one to withdraw |S300 from one account and a second to deposit |S300 in the other. In the first choice the transfer is made atomically; in the second it is not. Describe a scenario in which after the transfer, the sum of the balances in the two accounts is different (from what it was when both transactions started) at the instant the transfer is complete. Hint: Other transactions might be executing at the same time that you are doing the funds transfer.

What will be an ideal response?

You have the choice of running a single transaction to transfer |S300 from one of
your savings accounts to another savings account at the same bank or of running two
transactions, one to withdraw |S300 from one account and a second to deposit |S300 in
the other. In the first choice the transfer is made atomically; in the second it is not.
Describe a scenario in which after the transfer, the sum of the balances in the two
accounts is different (from what it was when both transactions started) at the instant
the transfer is complete. Hint: Other transactions might be executing at the same time
that you are doing the funds transfer.