What service is used to distribute web feeds to subscribers?

Answer the following questions true (T) or false (F)

1. Procedural abstraction involves information hiding in that only the 'contract' between the programmer using the function (the client) and author of a function is known to either. 2. A sequence of calls to the library function rand() generates mathematically correct random number sequences.

What do gray areas of a layer mask represent?

A. unmasked art B. 100% masked art C. semitransparency D. art not covered by the mask