Please help me with this Operating Systems Principles homework: I need help with question 2. Q2 Q1. Which of the six resource-allocation graphs below illustrate deadlock? For those situations that aredeadlocked, provide the cycle of threads and resources. Where there is not a deadlock situation, illustrate the orderin which the threads may complete execution.(a)(d)Q2.R₁:T₁R₁₂T₂R₂..T3PO22228P1P2Consider the following snapshot of a system:AllocationA B C D12020 1 1 212401 2011 0 0 1P3(b)P4(e)T₁R₁53R₂T₂a. How many bits are there in the logical address?b. How many bits are there in the physical address?T4T3R3(f)MaxA B C D4 3 1624 24365126233 1 1 2R₂₁R₁13R₂T4R₂13Using the banker's algorithm, determine whether or not each of the following states is unsafe. If the state is safe,illustrate the order in which the threads may complete. Otherwise, illustrate why the state is unsafe.a. Available = (2, 2, 2, 3)b. Available = (4, 4, 1, 1)c. Available = (3, 0, 1, 4)d. Available = (1, 5, 2, 2)Q3.Consider a logical address space of 4,048 pages with a 2 KB page size, mapped onto a physical memoryof 1024 frames. Answer and explain the following.Q4.Consider a paging system with the page table stored in memory. Answer and explain the following.a. If a memory reference takes 75 nanoseconds, how long does a paged memory reference take?b. If we add TLBs, and if 80 percent of all page-table references are found in the TLBs, what is the effectivememory reference time? (Assume that finding a page-table entry in the TLBs takes 4 ns)

Banker's algorithm can be defined as the algorithm which is used to avoid deadlock and allocate…

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Please help me with this Operating Systems Principles homework: I need help with question 2. Q2

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Please help me with this Operating Systems Principles homework:

I need help with question 2. Q2

Q1. Which of the six resource-allocation graphs below illustrate deadlock? For those situations that are
deadlocked, provide the cycle of threads and resources. Where there is not a deadlock situation, illustrate the order
in which the threads may complete execution.
(a)
(d)
Q2.
R₁
:
T₁
R₁₂
T₂
R₂
..
T3
PO
22228
P1
P2
Consider the following snapshot of a system:
Allocation
A B C D
1202
0 1 1 2
1240
1 201
1 0 0 1
P3
(b)
P4
(e)
T₁
R₁
53
R₂
T₂
a. How many bits are there in the logical address?
b. How many bits are there in the physical address?
T4
T3
R3
(f)
Max
A B C D
4 3 16
24 24
3651
2623
3 1 1 2
R₂₁
R₁
13
R₂
T4
R₂
13
Using the banker's algorithm, determine whether or not each of the following states is unsafe. If the state is safe,
illustrate the order in which the threads may complete. Otherwise, illustrate why the state is unsafe.
a. Available = (2, 2, 2, 3)
b. Available = (4, 4, 1, 1)
c. Available = (3, 0, 1, 4)
d. Available = (1, 5, 2, 2)
Q3.
Consider a logical address space of 4,048 pages with a 2 KB page size, mapped onto a physical memory
of 1024 frames. Answer and explain the following.
Q4.
Consider a paging system with the page table stored in memory. Answer and explain the following.
a. If a memory reference takes 75 nanoseconds, how long does a paged memory reference take?
b. If we add TLBs, and if 80 percent of all page-table references are found in the TLBs, what is the effective
memory reference time? (Assume that finding a page-table entry in the TLBs takes 4 ns)

Software system that manages computer hardware, software resources, and provide common services for computer programs.

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