How many type of reader and writer problems?  use semaphores to solve these problems , and explain them in detail.

answers:

Two types.

We required that the writers have exclusive access to the shared database. This synchronization problem is referred to as the readers-writers problem. Since it was originally stated, it has been used to test nearly every new synchronization primitive. The readers-writers problem has several variations, all involving priorities. The simplest one, refe