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helpMicrosoft Word - BN104_Assignment1_Mel_Syd_T3_2021 V2  	Memory Management 	1  BN104   	Memory Management 	1  BN104   	Memory Management 	1  BN104      	Assessment Details and Submission Guidelines  	Year and Term  	T2, 2022  	Unit Code  	BN104  	Unit Title  	Operating Systems  	Assessment   Title  	  Memory and Process Management  	Purpose of the assessment (with ULO   Mapping)  	The purpose of this assignment is to report on some important characteristics of Operating Systems and explain their functions. Students must answer questions about OS operation, and report on selected OS aspects and algorithms such as virtual memory, process scheduling and mobile operating systems. After successful completion of this assignment, students should be able to:    a. Report on the basics, and provide examples, of operating systems structure and functionality, including memory allocation virtual memory, demand paging and process and device management.  b. Describe the integration of hardware, operating systems and application software.  c. Explain in detail the functioning of some devices such as peripherals    	Weight  	Part A and Part B: 20%  	Total Marks  	30  	Word limit  	N/A  	Due Date  	11:55PM, Sunday, 29th September, 2022 (Week 11)  	  	Submission Guidelines  	Assignment structure and submission guidelines:  · All work must be submitted on Moodle by the due date along with a title Page. · The assignment must be in MS Word format, 1.5 spacing, 11-pt Calibri (Body) font and 2.54 cm margins on all four sides of your page with appropriate section headings.  · Reference sources must be cited in the text of the report, and listed appropriately at the end in a reference list using IEEE referencing style.  	Extension   	  	If an extension of time to submit work is required, a Special Consideration Application must be submitted directly to the School's Administration Officer, in Melbourne on Level 6 or in Sydney on Level  7. You must submit this application three working days prior to the due date of the assignment. Further information is available at: http://www.mit.edu.au/about-mit/institute-publications/policies- procedures-and-guidelines/specialconsiderationdeferment    	Academic Misconduct  	• Academic Misconduct is a serious offence. Depending on the seriousness of the case, penalties can vary from a written warning or zero marks to  	 	exclusion from the course or rescinding the degree. Students should make  themselves familiar with the full policy and procedure 	available at: 	http://www.mit.edu.au/about- mit/institute- publications/policies-procedures-and- guidelines/Plagiarism-AcademicMisconduct-Policy-Procedure. For further information, please refer to the Academic Integrity Section in your Unit Description.                        Assignment Description:  The assignment has following two parts:  	Part A – Lecture contents related questions for Memory Allocation                	 	 	(12 Marks)    	Part B - Case Study based question for Efficient Memory Management           	 	 	(18 Marks)    Part A: Answer the Following Questions    1. Briefly differentiate between the 8 Memory Allocation Scheme we discussed in class (A comparison  Table can be drawn).                                                                                                                             (4 Marks)   2. What is a Cache Memory? Pen down different levels of Cache and provide advantages of using it.  (3 Marks)    3. Calculate cache hit ratio and average memory access time using the formula presented below assuming that the total number of requests is 3,056 and 540 of those requests are found in the cache. The Average Cache Access Time is 50 sec and Average Main Memory Access Time is 70 sec.  (3 Marks)          • Referencing     Report needs to be properly cited and referenced following IEEE referencing style.                      (2 Marks)            Part B: Case Study: Efficient Memory Management for MIT Database and OS Scheduling Algorithms  1. A new memory management system needs to be incorporated to make the existing system more efficient. The below memory diagram consists of memory associated with the email addresses and names of students taking BN 104 course (referred as M1, M3, M6, M9 and M10 in Table 1).     Being an OS manager, your task is to evaluate memory compaction and write down the base and limit registers assigned by the OS after compaction. Also show the results in a new table.                   (15 Marks)    1K  	M1  	  	  	M6  	  	M3  	M9  	M10  5K  9K  13K  15K  18K  19K  20K  22K    Figure 1. Memory diagram of Computer System with five pages in the memory (M1, M3, M6, M9, M10)    2. Based on the Arrival Time and CPU Cycle you as an OS Specialist needs to calculate the Average Turnaround Time and draw Gantt Chart (timeline).  The Scheduling algorithms are listed as follows:  	Process  	Arrival Time  	CPU cycle  	A  	0  	20  	B  	2  	3  	C  	4  	6  	D  	5  	2  	E  	8  	8      a. First-come, first-served (FCFS)  b. Shortest job next (SJN)  c. Priority scheduling  d. Shortest remaining time (SRT)  e. Round robin  f. Multiple-level queues  g. Earliest deadline first (EDF)    • Referencing     Report needs to be properly cited and referenced following IEEE referencing style.                         (3 Marks)                                                                    Marking criteria: Marks are allocated as follows:    	Section to be included in the report  	Description of the section  	Marks  	Question No 1  	- 8 Memory Allocation Scheme  	4  	Question No 2  	- Cache Memory, its levels and advantages in system performance  	3  	Question No 3  	 - Calculating Hit ration and average memory access time  	3  	Reference style  	 Follow IEEE reference style and in-text citation    	2  	    Case Study  Evaluation  	Efficient Memory Management for MIT Database  	              8  	 	OS scheduling algorithm  	7  	Reference style  	Follow IEEE reference style and in-text citation    	3                      Marking Rubric for Assignment 2: Total Marks: 30    	Grade Mark  	HD >=80%  	D  70%-79%  	CR 60%-69%  	P  50%-59%  	Fail

Baljit · Accepted Answer

PROCESS AND MEMORY MANAGEMENT
PART A :
1.
	Type  of Scheme
	Definition
	Contiguous or Non Contiguous
	Advantages
	Disadvantages
	Single user contiguous
	Memory is divided into two  contiguous partitions.
	Contiguous memory allocation
	Easy to impliment
	Wastage of memory.it Cannot  be executed for large size of program.
	Fixed Partitions
	Main memory is divided into fixed  partitions of size equal or different.
	Contiguous memory allocation
	Improve CPU efficiency than single user contiguous
	Internal and external Fragmentation
	Dynamic Partitions
	Main memory is not divided into fixed partitions.
	Contiguous memory allocation
	No Internal fragmentation
	External fragmentation
	Relocatable  Dynamic Partitions
	Operating system  relocates the program and gather all the empty block in memory  make one block.
	Contiguous memory allocation
	No External Fragmentation
	Efficiency of system is decreased
	Paged
	Address of process is broken into equal sized block called pages.
	Non Contiguous memory allocation
	No Need  for compaction
	Possibility of internal fragmentation . Page Table  consume additional space.
More overhead.
	Demand Paged
	Pages are brought in main memory on the demand of cpu.
	Non Contiguous memory allocation
	Efficient use of memory ,No external fragmentation
	Possibility of internal fragmentation.
Memory access time is more
	Segmented
	Memory is divided into variable size block called segment.
	Non Contiguous memory allocation
	No internal fragmentation.
Size of segment table is less as compare to page table. Less overhead.
	Possibility of external fragmentation. Expensive  memory management algorithms. 
	Segmented /demand Paged
	Main memory is divided into segments then segments are further divided into pages
	Non Contiguous memory allocation
	No external fragmentation. Decrease memory usage.
	Possibility of internal fragmentation. More Complex.[1]
2. Cache Memory:-It is high speed memory which is used to improve performance of Cpu. Cache memory is small in size but it has high speed than main memory. Only CPU can access  cache memory. It holds the data of frequently used program by cpu if cpu again needs that data than Cache memory immediately provides data to cpu which saves time and improve performance of the system[2].
Different levels of Cache memory:-
L1 Cache:-This  type of cache memory is in built into the CPU. Then further Cache is divided into two parts instruction cache used to store instructions of  CPU and  data cache used to store data required by CPU.
L2 Cache:-This type of cache is placed outside the Cpu connected with high speed Bus or it can be in built into cpu.This memory is slower than L1 but it is faster than Main memory.
3.

Microsoft Word - BN104_Assignment1_Mel_Syd_T3_2021 V2 Memory Management 1 BN104 Memory Management 1 BN104 Memory Management 1 BN104 Assessment Details and Submission Guidelines Year and Term T2, 2022...

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