WhichofthefollowingcommandswillresetNFSoptionstotheirde-找考题网

单项选择题To examine the Exhibit， press the Exhibit button. While a developer is compiling a C program， vmstat 120 10 is run to determine the cause of a performance problem. Using the vmstat output as shown in the exhibit， which of the following conclusions is most appropriate to draw about the machine？（）

A. The machine has too many users.
B. The machine has an I/O bottleneck.
C. The machine has a CPU bottleneck.
D. The machine has a memory bottleneck.

单项选择题Whichofthefollowingcommandsshouldbeusedtomonitorthenumberofbytesreadonanygivendisk？（）

A. tprof
B. topas
C. filemon
D. vmstat

单项选择题WhichofthefollowingstatementsisTRUEconcerningthepocolumnofthevmstatcommand？（）

A. The sys is high when po is high.
B. The po represents the number of page steals.
C. The low values usually indicate insufficient paging space.
D. The low values usually indicate sufficient memory for the load.

单项选择题Whilemonitoringasystemusingvmstat，whichofthefollowingoptionsmostlikelyindicatesthatthesystemisCPUbound？（）

A. r is greater than 40
B. id is greater than 50
C. sum of id and wa equals 50
D. sum of us and sy equals 100

单项选择题A typical example of a process # 19082 in the proc file would be： # ls -l proc 19082 total 0 dr-xr-xr-x 1 root system 0 Sep 15 15：12 . dr-xr-xr-x 1 root system 0 Sept 15 15：12 .. -rw------- 1 root system 0 Sept 15 15：12 as -r-------- 1 root system 128 Sept 15 15：12 cred --w------- 1 root system 0 Sept 15 15：12 ctl dr-xr-xr-x 1 root system 0 Sept 15 15：12 lwp -r-------- 1 root system 0 Sept 15 15：12 map dr-x------ 1 root system 0 Sept 15 15：12 object -r--r--r-- 1 root system 448 Sept 15 15：12 psinfo -r-------- 1 root system 1024 Sept 15 15：12 sigact -r-------- 1 root system 1520 Sept 15 15：12 status -r--r--r-- 1 root system 0 Sept 15 15：12 sysent Writing to which of the following files will allow the owner to stop a process？（）

A. status
B. sysent
C. ctl
D. as

Which of the following commands will reset NFS options to their defaults？（）