Give three examples of transactions, other than an ATM bank withdrawal, in which a real-world event occurs if and only if the transaction commits.

What will be an ideal response?

1. Students register for courses online and a confirmation of the registration is printed
if and only if the registration transaction commits
2. A pay per viewmovie is ordered for a TV, and can be seen if and only if the
ordering transaction commits.
3. Software is ordered over the Internet and is downloaded if and only if the
purchasing transaction commits.