Can we integrate Siri and virtual assistants with Quora?
No, is the quick answer. Generally, APIs are required for this kind of integration. And, Quora does not have any public API yet. However, APIs would also be required on the virtual assistants, such as Siri. In fact, Apple is finally releasing something like a Siri SDK, but probably not adequate for this purpose.
See also my related Quora answers: