Programming Logic and Design, Introductory
9th Edition
ISBN: 9781337109635
Author: Joyce Farrell
Publisher: Cengage Learning
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Use the same semaphore notation shown above to describe how we can ensure the execution order of the
following process execution graph:
P6
P2
P7
P1
P3
P4
P5
Use all of the following semaphores in your answer:
s1=0; s2=0; s3=0; s4=0; s5=0; s6=0;
Consider the set of process:
Process ID Arrival Time Burst Time
P1
0
5
P2
0
10
P3
+
15
P4
18
10
P5
22
20
a) Draw the GANTT chart for the Round Robin time quantum -5) scheduling algorithm. Use the same
implementation you used for the programming assignmenti.e. the processes should always run in PID order.
Assume there is no context-switch overhead. Show your work for partial credit.
b) Write your answer to the following performance metrics given your above CANTT charts. Show your work
for partial credit.
Average Response time:
Average Wating time:
Average Turnaround time:
Consider a file currently consisting of 10 blocks. Assume that the file control block and the new block
information to be added are already in memory. Calculate how many disk I/O operations are required for the
linked allocation strategy, if, for one block, the following conditions hold:
HINTS: 1) ignore disk I/O associated with the file control block. 2) each read and each write is an explicit disk
I/O. 3) assume a pointer to the end of the list for linked allocation
a. The block is added at the beginning.
b. The block is added in the middle.
c. The block is added at the end.
d. The block is removed from the beginning.
e. The block is removed from the middle.
f. The block is removed from the end.
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- Compute the jackknife estimate of bias and standard error for the correlation statistics from the law82 data using r languagearrow_forwardQuestion D.1: Effective Access Time A computer keeps its page tables in memory. Memory access time is 100 nanoseconds (ns). Answer the following questions about the performance of this setup. Show your work. a) What is the effective access time (i.e. reading a word in memory) with no caching and a two-level page table? b) Consider the above scenario but with a TLB having a cache hit rate of 98%. If the TLB takes 20 ns to access, what is the effective access time of this setup when considering this TLB?arrow_forwardThe data law82 in bootstrap library contains LSAT and GPA for 82 law schools. 1. Write you own R code to estimate the correlation between LSAT and GPA scores, and compute the bootstrap estimate of the standard error and bias of the sample correlation. 2. Use the boot function in boot library to compute the bootstrap estimate of the standard error and bias of the sample correlation. Compare your results in 1 with the function output. using r languagearrow_forward
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