Operating System (OS)
The virtual memory is

An extremely large secondary memory
An extremely large main memory
An illusion of extremely large main memory
A type of memory used in super computer

ANSWER DOWNLOAD EXAMIANS APP

Operating System (OS)
The function(s) of file system is (are):

to provide for long and short term storage of files with appropriate economic tradeoffs.
to provide security against loss of information due to system failure
None of these
to provide complete file naming freedom to the users and to permit controlled sharing of files
All of these

ANSWER DOWNLOAD EXAMIANS APP