Task 10

For swap space created in a separate disk partition where no file system or directory structure is placed, _____________ used to allocate and deallocate the blocks.

• special routines must be

• normal file system routines can be

• normal file system routines cannot be

• swap space storage manager is

When a fixed amount of swap space is created during disk partitioning, more swap space can be added only by?

• only I

• only II

• both I and II

• neither I nor II

In UNIX, two per process ________ are used by the kernel to track swap space use.

• process tables

• swap maps

• memory maps

• partition maps

It is __________ to reread a page from the file system than to write it to swap space and then to reread it from there.

• useless

• less efficient

• more efficient

• none of the mentioned

RAID level 3 supports a lower number of I/Os per second, because _______________

• Every disk has to participate in every I/O request

• Only one disk participates per I/O request

• I/O cycle consumes a lot of CPU time

• All of the mentioned

RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a separate disk.

• 1

• 2

• 3

• 4

A performance problem with _________ is the expense of computing and writing parity.

• non-parity based RAID levels

• parity based RAID levels

• all RAID levels

• none of the mentioned

In RAID level 4, one block read, accesses __________

• only one disk

• all disks simultaneously

• all disks sequentially

• none of the mentioned

The overall I/O rate in RAID level 4 is ____________

• low

• very low

• high

• none of the mentioned

A write of a block has to access ____________

• the disk on which the block is stored

• parity disk

• a parity block

• all of the mentioned