Business, 05.05.2020 16:24 itsmemichellel

A. illustrate that the system is in a safe state by demonstrating an order in which the processes may complete.

b. if a request from process p1 arrives for (1, 1, 0, 0), can the request be granted immediately?

c. if a request from process p4 arrives for (0, 0, 2, 0), can the request be granted immediately?

Answers: 3

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Answer from: Cedars6976

(b) As request(P1) < Available, we can grant request

Explanation:

Need Matrix

Need [i, j] = Max [i, j] – Allocation [i, j]

ABCD

P0 2211

P1 2131

P2 0213

P3 0112

P4 2233

Available = (3 3 2 1)

1. Need(P0) < Available so, P0 can take all resources

Available = (3 3 2 1) + (2 0 0 1) (Allocation of P0) = (5 3 2 2)

2. Need(P3)<Available so, P3 will go next

Available = (5 3 2 2) + (1 3 1 2) = (6 6 3 4)

Like wise next P4, P1, P2 will get resources.

So safe sequence is P0 , P3, P4, P1, P2

Request from P1 is (1 1 0 0) and Available is (3 3 2 1)

As request(P1) < Available, we can grant request

Request from P4 is (0 0 2 0) and Available is (3 3 2 1)

As request (P4) < Available, we can grant request

Answer from: kimberlynassar1962

Question:

The question is incomplete. The snapshot of a system was not added. See below the remaining part of the question and the answers.

Allocation Max Available Available

ABCD ABCD ABCD

PO 2001 4212 3321

P1 31 21 5252

P2 2103 2316

P3 1312 1424

P4 1432 3665

(a) safe sequence is P0 , P3, P4, P1, P2

(b) The request can be granted

Explanation:

Need Matrix

Need [i, j] = Max [i, j] – Allocation [i, j]

ABCD

P02211

P12131

P20213

P30112

P42233

Available = (3 3 2 1)

1. Need(P0) < Available so, P0 can take all resources

Available = (3 3 2 1) + (2 0 0 1) (Allocation of P0) = (5 3 2 2)

2. Need(P3)<Available so, P3 will go next

Available = (5 3 2 2) + (1 3 1 2) = (6 6 3 4)

Like wise next P4, P1, P2 will get resources.

So safe sequence is P0 , P3, P4, P1, P2

Request from P1 is (1 1 0 0) and Available is (3 3 2 1)

As request(P1) < Available, we can grant request

Request from P4 is (0 0 2 0) and Available is (3 3 2 1)

As request(P4) < Available, we can grant request

Answer from: Quest

His ballance should be $65

Answer from: Quest

you have to put the parentheses like this:

$(85-4) \div 9 \times 10$

in fact, you have to perform the operation inside parentheses first, and then proceed in order:

$81 \div 9 \times 10 = 9 \times 10 = 90$

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