. A certain computation generates two arrays a and b such that a[i] = f for 0sisn and b[i] = g(a[i]) for 0si
. A certain computation generates two arrays a and b such that a[i] = f for 0sisn and b[i] = g(a[i]) for 0si
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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![. A certain computation generates two arrays a
and b such that a[i] = f for 0Sisn and b[i] =
g(a[i]) for 0<i<n. Suppose this computation is
decomposed into two concurrent processes X and
Y such that X computes the array a and Y
computes the array b. The processes employ two
binary semaphores R and S, both initialized to
zero, The array a is shared by the two processes.
The structure of the processes are shown below.
%3D
%3D
Process X
Process Y
private i;
private i;
for (i = 0; i < n; i++) for (i = 0; i <n; i++)
%3D
%3D
{
a[i] = f(i);
ExitsX (R, S);
{
EntryY(R, S);
b[i] = g(a[i]);
}
Which one of the following represents the
CORRECT implementations of ExitsX and
EntryY?
(a) ExitsX (R, S) {
P(R);
V(S)
(b) ExitsX (R, S) {
V(R);
V(S);
EntryY(R, S) {
P(S);
V(R);
EntryY(R, S) {
P(R);
P(S);
(d) ExitsX (R, S) {
V(R);
P(S);
(c) ExitsX (R, S) {
P(S);
V(R)
Entry Y(R, S){
V(S);
P(R);
EntryY(R, S){
V(S);
P(R);](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa372fd29-9553-4f35-9bea-51c4457e15d3%2F11c5a387-7eb8-42f4-ad6a-4e06e32671e1%2Fx2cesrn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:. A certain computation generates two arrays a
and b such that a[i] = f for 0Sisn and b[i] =
g(a[i]) for 0<i<n. Suppose this computation is
decomposed into two concurrent processes X and
Y such that X computes the array a and Y
computes the array b. The processes employ two
binary semaphores R and S, both initialized to
zero, The array a is shared by the two processes.
The structure of the processes are shown below.
%3D
%3D
Process X
Process Y
private i;
private i;
for (i = 0; i < n; i++) for (i = 0; i <n; i++)
%3D
%3D
{
a[i] = f(i);
ExitsX (R, S);
{
EntryY(R, S);
b[i] = g(a[i]);
}
Which one of the following represents the
CORRECT implementations of ExitsX and
EntryY?
(a) ExitsX (R, S) {
P(R);
V(S)
(b) ExitsX (R, S) {
V(R);
V(S);
EntryY(R, S) {
P(S);
V(R);
EntryY(R, S) {
P(R);
P(S);
(d) ExitsX (R, S) {
V(R);
P(S);
(c) ExitsX (R, S) {
P(S);
V(R)
Entry Y(R, S){
V(S);
P(R);
EntryY(R, S){
V(S);
P(R);
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