ITPEC FE Morning October 2020 Question 62
Which of the following is an on-demand service?
Explanation
A repeat drama delivered over the Internet when the user requests it — an on-demand service provides content at the moment the user asks for it.
On demand means the user decides when the service starts: the provider keeps the content ready and delivers it in response to each request. Video on demand, where a viewer picks a programme and it streams immediately, is the standard example, as opposed to broadcasting, where the provider's schedule decides what is sent and when.
Answer (c)
Why not others:
- •(a) — buying a DVD on a website is ordinary e-commerce: a finished physical product is sold and shipped, and the movie itself is not delivered at the time of the request
- •(b) — printing a fixed number of copies decided in advance is planned mass production, the opposite of producing on request (print on demand)
- •(d) — news sent periodically is push delivery on the provider's schedule, not triggered by the user's request
Key rule: A service is on demand when the user's request triggers the delivery; anything sent on a schedule or produced in advance in a fixed quantity is not.
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