Final answer:
A shared web app can run for an unlimited amount of time as long as it is hosted on an active server.
Step-by-step explanation:
A shared web app can run for an unlimited amount of time as long as it is hosted on a server that is active. When a user accesses the web app, it sends a request to the server, which processes the request and sends back the response. The web app will continue to run for as long as the server is active and the user remains connected.
It's important to note that the performance of the web app may depend on various factors such as server capacity, network speed, and the complexity of the web app itself. If there is high traffic or heavy usage, the server may become overloaded and affect the performance of the web app.