File System Basics - Solaris 9 System Administrator - page 144

Question 3

Which of the following are proc tools? [Select all that apply.]
❑

A. pstop

❑ B. pfiles

❑ C. pstart

❑ D. pwdx

❑ E. psig

❑ F. pmem

Answers A, B, D, and E are correct. The pstop command (answer A) stops
the specified process(es). The pfiles command lists the file(s) opened by the
specified process(es). The prun command, not the pstart command, is used
to restart the specified process(es). Therefore, answer C is incorrect. The
pwdx command is used to display the current working directory of the
specified process(es). The psig command is used to list pending signals asso-
ciated with the specified process(es). The pmap command, not the pmem
command, is used to display memory usage of the specified process(es).

Question 4

Which of the following pseudo-file systems are used to provide fast local access
to files and directories? [Select all that apply.]
❑ A. TMPFS

❑ B. LOFS

❑ C. SWAPFS

❑ D. PROCFS

❑ E. CACHEFS

Answers A and E are correct. Both provide a local cache for data. A TMPFS
instance is used for temporary data that is lost when the system is shut down
or rebooted. A CACHEFS instance is used for data from remote file systems or
slow devices. LOFS provides alternative pathnames, therefore it is incorrect.
SWAPFS provides system swap space, which is used to store memory contents;
therefore it is incorrect. PROCFS provides information about active processes,
which is also incorrect.