Operating System (OS)
Data encryption

cannot be used by private installations
is mostly used by financial networks
is not necessary, since data cannot be intercepted
is mostly used by public networks
None of these

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
A critical region is

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

ANSWER DOWNLOAD EXAMIANS APP