$147.$ In a file system the file is identified by:

A$.$ A name

B$.$ A number

C$.$ A user identification

D$.$ A type

$148.$ Contiguous allocation is:

A$.$ One of the first methods of memory management

B$.$ One of the last methods of memory management

C$.$ One of the best methods of memory management

D$.$ One of the fast methods of memory management

$149.$ Interprocess Communication by using Message passing consists of:

A$.$ Using an area of memory shared among the processes that wish to communicate

B$.$ Using lock and unlock operations to communicate

C$.$ Using network system by processes to communicate

D$.$ Using send and receive operations to communicate

$150.$ The cost of Context Switch Time related to Swapping is not dependent of:

A$.$ Size of process

B$.$ Transfer rate between RAM and backing store

C$.$ Memory allocation System calls used with swapping

D$.$ CPU characteristics

$151.$ Open$-$file table does not contain:

A$.$ Access rights

B$.$ Disk location

C$.$ File$-$open count

D$.$ File pointer

$152.$ The following file operation is responsible of the change of position in the file:

A$.$ Create

B$.$ Truncate

C$.$ Seek

D$.$ open

$153.............$ is not one of the file attributes:

A$.$ A tag

B$.$ user identification

C$.$ Location

D$.$ identifier

$154.$ This chapter speaks about $......$ solution to ensure the orderly execution of

cooperating$/$concurrent processes:

A$.1$

B$.2$C$.3$D$.4$

$155.$ Processes using IPC by message passing does not need to:

A$.$ Estalblish connection between them

B$.$ Use send call system

C$.$ Use shared variable

D$.$ Use receive call system