Arjun Suresh (talk | contribs) |
Arjun Suresh (talk | contribs) |
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| Line 3: | Line 3: | ||
<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
if (i% 2==0) { | if (i% 2==0) { | ||
| − | if (i<n) request | + | if (i<n) request Ri ; |
| − | if (i+2<n)request | + | if (i+2<n)request Ri+2 ; |
} | } | ||
else { | else { | ||
| − | if (i<n) request | + | if (i<n) request Rn-i ; |
| − | if (i+2<n)request | + | if (i+2<n)request Rn-i-2 ; |
} | } | ||
</syntaxhighlight> | </syntaxhighlight> | ||
A system has <math>n</math> resources <math>R_0 ,..., R_n-1</math> , and <math>k</math> processes <math>P_0 ,.....P_{k-1}</math> . The implementation of the resource request logic of each process <math>P_i</math> . is as follows: <syntaxhighlight lang="c"> if (i% 2==0) {
if (i<n) request Ri ; if (i+2<n)request Ri+2 ;
} else {
if (i<n) request Rn-i ; if (i+2<n)request Rn-i-2 ;
} </syntaxhighlight> In which one of the following situations is a deadlock possible?
(A) n = 40,k = 26
(B) n = 21,k = 12
(C) n = 20,k = 10
(D) n = 41,k = 19
A system has <math>n</math> resources <math>R_0 ,..., R_n-1</math> , and <math>k</math> processes <math>P_0 ,.....P_{k-1}</math> . The implementation of the resource request logic of each process <math>P_i</math> . is as follows: <syntaxhighlight lang="c"> if (i% 2==0) {
if (i<n) request Ri ; if (i+2<n)request Ri+2 ;
} else {
if (i<n) request Rn-i ; if (i+2<n)request Rn-i-2 ;
} </syntaxhighlight> In which one of the following situations is a deadlock possible?
(A) n = 40,k = 26
(B) n = 21,k = 12
(C) n = 20,k = 10
(D) n = 41,k = 19
GATECSE