Operating System (OS)
The term "operating system" means

the way a computer operator works
conversion of high level language into machine code
the way a floppy disk drive operates
None of these
a set of programs which controls computer working

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Data encryption

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

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
Link encryption

is less secure than end-to-end encryption
None of these
can not be used in a public network
is used only to debug
is more secure than end-to-end encryption

ANSWER DOWNLOAD EXAMIANS APP