Raid is Redundant Array of Independent Disks/Device.It is
Technology to improve Disk read & write Performence and
FaultTolerance., By adding new disk u can recover data if
one of disk goes down / fails. parity is a calculated
technique to rebuild data from disk fails.
levels in Raid
0 - stripping
1 - Mirroring
3 - Striping with Parity
5 - Striping with Parity with more fault tolerant widley used.
The file /proc/cpuinfo is a collection of a) cpu items b) architecture independent items c) both (a) and (b) d) none of the mentioned
The proc file system records the number of interrupts a) per CPU only b) per IO device only c) per CPU per IO device d) none of the mentioned
Which file of the proc file system can be used instead of "syslog" system call to read kernel messages? a) /proc/kmsg b) /proc/moudle/kmsg c) /proc/module/msg d) /proc/msg
The file /proc/modules is a text list of a) static modules b) dynamic modules c) modules that have been loaded by the system d) none of the mentioned
/proc/partitions contains a) major number of each partition b) minor number of each partition c) number of block and partition name d) all of the mentioned
Which one of the following operating system does not supports proc filesystem? a) IBM AIX b) QNX c) Solaries d) none of the mentioned
Obtaining of the PID can be done by the utility a) pgrep b) pidof c) ps d) all of the mentioned
Which one of the following contains various bits of information about the state of power management? a) /proc/acpi b) /proc/apm c) both (a) and (b) d) none of the mentioned
What is /proc/[PID]/cwd? a) symbolic link to current directory of the process b) regular file containing the information about the current status of the process c) directory containing various sub-directories d) none of the mentioned
Which one of the following is a sym-link to the root path as seen by the process? a) /proc/[PID]/root b) /proc/[PID]/path c) both (a) and (b) d) none of the mentioned
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