Cuda Streams and Cublas Handles What's the difference?


Does anyone know if there is a difference in functionality between cuda streams and cublas handles? Is the relationship one-to-one? In other words:

(1) Can only 1 stream can be paired with 1 handle and vice-versa?
(2) Can cublas routines called with a particular handle tied to a particular stream run at the same time as another cublas routine with its own handle/stream?