设有一个顺序栈S,元素s1, s2, s3, s4, s5, s6依次进栈,如果6个元素的出栈顺序为s2, s3, s4, s6, s5, s1,则顺序栈的容量至少应为________。 A.6 B. 5 C. 4 D. 3
进程P1、P2、P3、P4和P5的前趋图如下:若用PV操作控制进程P1~P5并发执行的过程,则需要设置6个信号S1、S2、S3、S4、S5和S6,且信号量S1-S6的初值都等于零。下图中a和b处应分别填写(请作答此空);c和d处应分别填写( ),e和f处应分别填写( )。 A. P(S1)P(S2)和P(S3)P(S4) B. P(S1)V(S2)和P(S2)V(S1) C. V(S1)V(S2)和V(S3)V(S4) D. P(S1)P(S2)和V(S1)V(S2)
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进程P1、P2、P3、P4和P5的前趋图如下:若用PV操作控制进程P1~P5并发执行的过程,则需要设置6个信号S1、S2、S3、S4、S5和S6,且信号量S1-S6的初值都等于零。下图中a和b处应分别填写( );c和d处应分别填写(请作答此空),e和f处应分别填写( )。 A. P(S1)P(S2)和V(S3)V(S4) B. P(S1)P(S3)和V(S5)V(S6) C. V(S1)V(S2)和P(S3)P(S4) D. P(S1)V(S3)和P(S2)V(S4)
进程P1、P2、P3、P4和P5的前趋图如下:若用PV操作控制进程P1~P5并发执行的过程,则需要设置6个信号S1、S2、S3、S4、S5和S6,且信号量S1-S6的初值都等于零。下图中a和b处应分别填写( );c和d处应分别填写( ),e和f处应分别填写(请作答此空)。 A. P(S3)P(S4)和V(S5)V(S6) B. V(S5)V(S6)和P(S5)P(S6) C. P(S2)P(S5)和P(S4)P(S6) D. P(S4)V(S5)和P(S5)V(S6)
设有一个顺序栈S,元素s1,s2,s3,s4,s5,s6依次进栈,如果6个元素的出栈顺序为s2,s3,s6,s5,s1则顺序栈的容量至少应为()。
单选题S1={1,2,...,8,9},S2={2,4,6,8},S3={1,3,5,7,9},S4={3,4,5},S5={3,5},在条件X⊆S1且X⊄S3下,X与( )集合可能相等。A X=S2或S3B X=S4或S5C X=S1,S2或S4D X与S1,…,S5中任何集合都不相等
单选题Refer to the exhibit. The command spanning-tree guard root is configured on interface Gi0/0 on both switch S2 and S5. The global configuration command spanning-tree uplinkfast has been configured on both switch S2 and S5. The link between switch S4 and S5 fails. Will Host A be able to reach Host B?()AYes. Traffic can pass either from switch S6 to S3 to S2 to S1, or, from switch S6 to S5 to S2 to S1.BNo. Traffic will pass from switch S6 to S5 and dead-end at interface Gi 0/0.CNo. Traffic will loop back and forth between switch S5 and S2.DYes. Traffic will pass from switch S6 to S3 to S2 to S1.ENo. Traffic will either pass from switch S6 to S5 and dead-end, or traffic will pass from switch S6 to S3 to S2 and dead-end.
单选题设有一顺序栈,元素1,2,3,4,5依次进栈,如果出栈顺序是2,4,3,5,1则栈的容量至少是:()A 1B 2C 3D 4