Operating System (OS)
The primary purpose of an operating system is to:

keep system programmers employed
make the most efficient use of the hardware
make computer easier to use
None of these
allow people to sue the computers

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
A critical region is

a program segment where shared resources are accessed
one which is enclosed by a pair of P and V operations on semaphores
none is the above
a program segment that often causes unexpected system crashes
a program segment that has not been proved bug-free

ANSWER DOWNLOAD EXAMIANS APP