A. allows processes to communicate and synchronize their actions when using the same address space
B. allows processes to communicate and synchronize their actions
C. allows the processes to only synchronize their actions without communication
D. none of the mentioned

A. Orphan
B. Zombie
C. Body
D. Dead

A. be a duplicate of the parent process
B. never be a duplicate of the parent process
C. cannot have another program loaded into it
D. never have another program loaded into it

A. A Negative integer, Zero
B. Zero, A Negative integer
C. Zero, A nonzero integer
D. A nonzero integer, Zero

A. Process Control Block
B. Device Queue
C. Process Identifier
D. None of the mentioned

A. Normally
B. Abnormally
C. Normally or abnormally
D. None of the mentioned

A. wait 
B. fork
C. exit
D. exec

A. a condition variable must be declared as condition
B. condition variables must be used as boolean objects
C. semaphore must be used
D. all of the mentioned

A. shared data structures
B. procedures that operate on shared data structure
D. synchronization between concurrent procedure invocation
D. all of the mentioned

A. hardware level
B. software level
C. both hardware and software level
D. none of the mentioned