Semaphores are mostly used to implement ____________
A. System calls
B. IPC mechanisms
C. System protection
D. None of the mentioned
查看答案
The bounded buffer problem is also known as ____________
A. Readers – Writers problem
B. Dining – Philosophers problem
C. Producer – Consumer problem
D. None of the mentioned
In the bounded buffer problem, there are the empty and full semaphores that ____________
A. count the number of empty and full buffers
B. count the number of empty and full memory spaces
C. count the number of empty and full queues
D. none of the mentioned
In the bounded buffer problem ____________
A. there is only one buffer
B. there are n buffers ( n being greater than one but finite)
C. there are infinite buffers
D. the buffer size is bounded
To ensure difficulties do not arise in the readers – writers problem _______ are given exclusive access to the shared object.
A. readers
B. writers
C. readers and writers
D. none of the mentioned
微信支付 
支付宝支付