c) Given a list of holes in a variable partition, the memory system contains the followingentries in given order: 350K, 150K, 240K and 450K. Consider the following sequencesof requests: A=200K, B=350K, C%3D100K, and D=4O0K.By using the Best Fit and the Worst Fit allocation algorithm, allocate the memory blocksfor the processes.Answer: (You may draw horizontally)

Name: c) Given a list of holes in a variable partition, the memory system c
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Description: c) Given a list of holes in a variable partition, the memory system contains the followingentries in given order: 350K, 150K, 240K and 450K. Consider the following sequencesof requests: A=200K, B=350K, C%3D100K, and D=4O0K.By using the Best Fit and

The question is to allocate the memory blocks for the processes using Best Fit and Worst Fit…

Engineering

Computer Science

c) Given a list of holes in a variable partition, the memory system contains the following entries in given order: 350K, 150K, 240K and 450K. Consider the following sequences of requests: A=20OK, B=350K, C=10OK, and D=400K. By using the Best Fit and the Worst Fit allocation algorithm, allocate the memory blocks for the processes. Answer: (You may draw horizontally)

c) Given a list of holes in a variable partition, the memory system contains the following entries in given order: 350K, 150K, 240K and 450K. Consider the following sequences of requests: A=20OK, B=350K, C=10OK, and D=400K. By using the Best Fit and the Worst Fit allocation algorithm, allocate the memory blocks for the processes. Answer: (You may draw horizontally)

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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Suppose your system has a memory of size 100 MB using contiguous memory allocations and there are 4 fixed size partitions. Partition one of size 50, partition 2 of size 200, partition 3 of size 100 and partition 4 of size 150 Consider First 5 letters of your name. The ASCII code of the letters is the size of process and the alphabet is the name of process. The processes appear in alphabetical order. Q= How many processes will be loaded in the memory at a time? For contiguous memory allocation show the algorithms used to allocate memory partitions to each process and state which algorithm will work best and why? Also state the amount of internal and external fragmentation for the processes and partitions after allocation NOTE :MY NAME IS ALIZAHID
1. Consider that in your computer, you have five (5) memory partitions of 180 MB, 590 MB, 280 MB, 380 MB, 700 MB. Using the memory partition allocation methods do the best-fit, first-fit and worst- fit to place the processes of size 315 MB, 420 MB, 230 MB, and 530 MB? Find the algorithm which makes the best use of the memory?
Assume there are 200 KB, 600 KB, 300 KB, 400 KB, and 700 KB memory partitions. These divisions are correct. Allocate processes with parameters 312 KB, 517 KB, 212 KB, and 526 KB using the first fit, best fit, and worst fit algorithms, then answer the following: Use a figure or table to represent the allocations. 2.Which of the three algorithms uses memory the most efficiently?
In a system with fixed partitions, there are 4 partitions available to jobs. Their sizes are 16, 32, 48, and 64 KB. Four jobs executed by the system at the moment have the following sizes: 12, 22, 42, and 55 KB. The amount of internal fragmentation expressed in KB is: نه نه نه نن فم a. b. C. d. e. f. g. h. 0 12 17 25 29 34 41 56
suppose that a disk drive has 200 tracks, numbered 0 to 199. The drive is currently serving a request at track 50, and the previous request was at track 20. The queue of pending requests, in FIFO order is, 95, 180, 34,119,11,123,62,64. Starting from the current head position, what is the total distance (in tracks) that the disk arm moves to satisfy all the pending requests, for each of the following disk scheduling algorithms? a. FCFS: b. SSTF
Consider a filesystem that uses inodes to represent files. Each inode contains pointers to 12 direct disk blocks, as well as a single and double indirect blocks. Disk blocks are 1KB in size, and a pointer to a disk block requires 4 bytes. If we install this filesystem on a 4TB SSD, we have (select all that apply) the SSD cannot store more than 4 billion files the SSD cannot store more than 1 billion files the SSD at least can store about 650 files the SSD at least can store about 6,500 files none of above
Consider there are five (5) memory partitions in computer. The memory blocks are of sizes 180 MB, 500 MB, 350 MB, 280 MB, 600 MB. Use the memory partition allocation methods to find the first-fit to place the processes of size 200 MB, 300 MB, 350 MB, and 400 MB? Find the algorithm which makes the best use of the memory? First Fit Process Process Size Block No P1 200 P2 300 P3 350 P4 400
Last solution had mistakes: For these questions, assume that memory partitions can be subdivided; multiple processes may fit in a partition if there is room. For example, if we had a 30-MB partition and a 20-MB process that fits in the partition, the partition’s new size is 10 MB after placing the process in it. If a second, 8-MB process arrives, we may place it in the partition, leaving 2 MB free in the partition. (The original memory partition then contains a 10-MB and an 8-MB process.) Consider a swapping system where memory has partitions of the following sizes: 180 MB, 100 MB, 40 MB, 200 MB, 300 MB, and 150 MB (in order). For first fit, how are processes of sizes 180 MB, 30 MB, 150 MB, 80 MB, 100 MB, and 70 MB placed (in order)? Indicate which requests (if any) cannot be satisfied. Repeat question (a) for best fit. Repeat question (a) for worst fit.
In a system that uses contiguous memory allocation, giving the following list of free partitions: (the numbers represent the size of each free partition) ->200->10->40->100->70->50->100 Using best fit algorithm, what is the list of free partition after the following processes are brought into the system: a 30 MB process, 90 MB process, a 50 MB process and a 200 MB process.
Consider the Buddy algorithm for memory allocation used in traditional UNIX. Suppose the memory is 64MB. Consider the following sequence of events: (a) process X requests 7 MB, (b) process Y requests requests 12 MB, (c) process Z requests 2 MB, (d) process X exits releasing its memory. If the events are processed by the Buddy algorithm, draw figures to show the allocated and free blocks after every event in the above sequence.
Consider a file system that uses inodes to represent files. Disk blocks are 8 KB in size, and a pointer to a disk block requires 8 bytes. This file system has 12 direct disk blocks, as well as 1 single and 1 double indirect disk blocks. What is the maximum size of a file that can be stored in this file system in GBs (round to the nearest integer)?
Given five memory partitions of 400 KB, 900 KB, 300 KB, 200 KB, and 700 KB (in order), how would each of the first fit, and best fit algorithms place processes of 700 KB, 300 KB, 400 KB, and 700 KB (in order)? Please answer the following questions. 1. Which algorithm can allocate all the five processes? (Fill the blank from one of the chooses: first fit, best fit) 2. What is the search time for the first fit algorithm? (Only fill it with a number)