Regarding the command:
nice -5 /usr/bin/prog
Which of the following statements is correct?
A. /usr/bin/prog is executed with a nice level of -5.
B. /usr/bin/prog is executed with a nice level of 5.
C. /usr/bin/prog is executed with a priority of -5.
D. /usr/bin/prog is executed with a priority of 5.
題解
「nice」指令可以在執行指令的同時事先指定好行程的nice值。「-5」參數等同於「-n 5」，因此答案是選項B。如果要設定成「-5」(負五)，參數應為「--5」或是「-n -5」。