Following is a mapping of Logical Memory to Physical Memory using a Page Table. You are required to fil the Page Table: Physical Memery 1 Page 5 Logical Memery Page 0 2 Page 2 Page 1 Page 2 3 Page 4 4. Page 3 5 Page 0 Page 4 6 7 Page 1 8 Page 3 Page 5 Page Table
Q: 6. Given that main memory is composed of four-page frames for public use and that a program requests…
A: Here, we are going to tell the value of all 4 page frames using FIFO, LRU and LFU.
Q: Following is a mapping of Logical Memory to Physical Memory using a Page Table. You are required to…
A: It is the data structure that is used by the virtual memory system in the OS of a computer in order…
Q: The following page reference changes occur during a given time interval. 4 2 0 1 2 5 1 4 0 2 3 5 7…
A: Page replacement algorithms are used in order to replace an existing page in the memory with a new…
Q: Consider the following sequence of virtual memory references (in decimal) generated by a single…
A: Page size are as follows 0 -> 0 to 1023 1 -> 1024 to 2047 2 -> 2048 to 3071 3 -> 3072…
Q: The page fault frequency algorithms Physical memory is initially empty. The following reference…
A: GIVEN: The page fault frequency algorithms Physical memory is initially empty. The following…
Q: Assume you now have 1kB of memory, i.e. the memory address space runs from 0 to 1023. The starting…
A: Find the answer below. I hope this will be helpful for you..
Q: If you were asked to perform the tasks in full, what would be the memory behavior of such a line?…
A: Memory basically has 3 important functions. They are: ⦁ Encoding ⦁ Storing ⦁ Retrieving
Q: In layman's terms, here's how dynamic memory allocation works.
A: Memory allocation: Memory allocation is allocating a portion of a computer's hard disc to serve as…
Q: Assume variables have logical addresses with 16-bit page numbers and 16-bit offset using the memory…
A: Given:
Q: static and dynamic memory management
A: Stаtiс Memоry Аllосаtiоn:-Stаtiс vаriаble defines in оne blосk оf аllосаted sрасe, оf а fixed…
Q: . _____ method is used to map logical addresses of variable length onto physical memory. a. Paging…
A: Dear Student, In segmentation the memory is divided into segments and the logical addresses are…
Q: Q-1 Place the following values on the memory given at right side - A) Write the memory address of…
A: According to the guidelines i can answer only 1st que...please ask 2nd que separately :
Q: Draw syntax tree for the above mentioned expression Convert it into equivalent direct acyclic graph…
A:
Q: Which of the following is false for segmented paged memory allocation? Pages of a program can be in…
A: Segmented paging: It is a actual frame number with a page offset that is mapped to the memory to get…
Q: Give two examples of how a programmer might increase cache speed.
A: The question is to give two examples of how programmer might increase cache speed.
Q: se C, C++, python or matlab to develop a program whose main routine accepts two parameters n and k,…
A: Solution:-- 1)The given question has required for the solution to be provided as the program for…
Q: Consider the virtual memory scheme using paging. The page size is 128 bytes. The entries in the page…
A: In this case, the machine is a 16-bit system with a 4KB page size and 64KB of physical memory.…
Q: ssume a program of size 460 Bytes, and its virtual address sequence is as following 10 11 104 170…
A: Given: It is given that the sequence of memory reference from a 460-byte program is as follows:…
Q: CS = 1024H, IP = 1025H. SS = 1092H, SP = 1017H. Now, find out the physical address of the first…
A: Solution:-
Q: Based on the given paging model of logical and physical memory, draw a page table to show its…
A: Here in this question we have given a logical memory and physical memory.and we have asked to draw a…
Q: Computer Science This question is about paging-based virtual memory A computer has a virtual-momory…
A: In a given computer Virtual - memory size = 250MB Size of Primary Memory = 325 KB = 219 B Page -…
Q: What is the difference between associative cache memory and content-addressable memory?
A: A CAM(Content-addressable memory) as the name implies is addressed by content. It is also known as…
Q: In the table below, to have 8 memory addresses where each memory address holds one byte of data…
A: With n bits, we can identify 2n different memory locations. For example, 1 bit: 21 = 22 bits: 22 =…
Q: Show at what points in time page replacements occur, and which pages are evicted, using the…
A:
Q: Suppose we have the instr Memory 100 600 R1| ... 400 300 ... 500 100 600 500 ... 700 800 Assume R1…
A: It is defined as the ways how architectures specify the address of an object they want to access. In…
Q: Assume that main memory is composed of only three page frames for public use and that a seven-page…
A: As per the answering guidelines, solving the 1st question completely. 2 FIFO using 3 frames.
Q: Assume variables have logical addresses with 16-bit page numbers and 16-bit offset using the memory…
A: Note: As you have a multipart question, as per our policy, we will solve the first three questions…
Q: 3) Suppose an application program requires 2500H bytes of memory for its code, 2FOH bytes of memory…
A: Generally any application has following elements code/text , data , stack and heap. Stack…
Q: 21. The idea of cache memory is based on a. The property of locality of reference b. The…
A: 1) The Idea of the cache memory is based on the property of Locality of reference 2) Locality of…
Q: CA_10 Let the virtual address be V bits and the virtual addtess space be byte-addressable, the page…
A: Note: Answering the first three subparts as per the guidelines. Given : Virtual address bits = V…
Q: 4 2 012 0 4 1 2 6 7 3 5 Determine the four pages that are resident in main memory after each page…
A: Number of frames in main memory = 4K / 1K = 4 We will first understand FIFO. Initially, all the…
Q: Suppose a computer using direct-mapped cache has 2² bytes_of_byte-addressable main memory and a…
A: a computer using a direct - mapped cache has 232 bytes of byte - addressable main memory cache…
Q: Consider a program that uses absolute physical memory references meaning that each reference refers…
A: Here,we consider a program that uses absolute physical memory references meaning that each reference…
Q: A machine has a memory of 64 frames, with each frame being 1K bytes. Current free-frame list is:…
A:
Q: Address [0] = 61fe04 Value of [0] = # Address [1] = 61fe08 Value of [1] = $ Address [2] = 61fe0c…
A: 1 #define MAX 3 2 int var[] = {35, 36, 37}, i, *ptr; 3 ptr = var; 4 for (i = 0;…
Q: What is the smallest amount of page table size we need to keep in memory for each 64-bit application…
A: Given that, Total number of bits= 64 Number of used bits= 64-16= 48 bits Given entries contains 4…
Q: A page table may contain named entries (memory mapped files, such as code of an executable program)…
A: A page table may contain named entries (memory mapped files, such as code of an executable program)…
Q: Q3 The program size = 16, and page size 2^2, find the physical address in the following: 1) page 0…
A: Answer
Q: Q4 Use the input bellow to answer the following questions: RAM size = 1 MB , The logical address…
A: Answer
Q: Select problem below. Your post must include: The problem statement. A description of your solution…
A: Since no programming language is mentioned, I am using python. Algorithm: Start Read mac address…
Q: Assume variables have logical addresses with 16-bit page numbers and 16-bit offset using the memory…
A: The logical address is represented as combination of page number and page offset. physical address…
Q: Fill in blank Suppose that segmentation technique is used for memory management. If the memory…
A: Here, we are asked the size of a user stack where we are given memory address ans segment ID bits.…
Q: Write a C code to perform vector arithmetic: Define 3 vectors A[100], B[100], C[100]. Get n from as…
A: Answer is given below-
Q: Giventhe following assignment of some program’s virtual pages to physical pages in a system with 4…
A: Using the subdivision above, the first level page table points to 1024 2nd level page tables, each…
Q: 3. Calculate the physical memory location for each of the following cases? a- The logical address…
A: Given: 3. Calculate the physical memory location for each of the following cases? a- The logical…
Q: When shouldn't you initialize memory to store something? Select one: a. To set up a struct b. To…
A: A processor is a small chip that resides in a computer and other electronic devices. Its basic job…
Q: Short Answer: A program has the following page reference string 0122 3 4 4 1 3 3 25 66 2 4 If we…
A: Part (a) Following is the figure to represent the page allocation/replacement of the pages: Number…
Step by step
Solved in 2 steps with 1 images
- 228. In virtual memory by giving the page reference a process can a. Stop b. Execute c. Control d. TerminateThe page fault frequency algorithms Physical memory is initially empty. The following reference string is processed:0 1 4 0 2 0 0 1 0 3 0 4 0 3 Show which pages are resident under the page fault frequency algorithm with d = 3. Indicate when page faults occur.Please DO NOT respond to this question by copy/pasting the code provided elsewhere on the site, none of those work. Thanks. Virtual Memory Lab This lab project addresses the implementation of page-replacement algorithms in a demand-paging system. Each process in a demand-paging system has a page table that contains a list of entries. For each logical page of the process, there is an entry in the table that indicates if the page is in memory. If the page is in memory, the memory frame number that page is resident in is indicated. Also, for each page, the time at which the page has arrived in memory, the time at which it has been last referenced, and the number of times the page has been referenced since the page arrived in memory are maintained. The page table data structure is a simple array of page-table entries (PTEs). Each PTE contains five fields as defined below: struct PTE { int is_valid; int frame_number; int arrival_timestamp; int…
- ) Consider the following sequence of virtual memory references (in decimal) generatedby a single program in a pure paging system:100, 110, 1400, 1700, 703, 3090, 1850, 2405, 2460, 4304, 4580, 3640a. Derive the corresponding reference string of pages (i.e. the pages the virtual addressesare located on), assuming a page size of 1024 bytes. (Assume that page numberingstarts at 0)b. For the page sequence derived above, determine the number of page faults for each ofthe following page replacement strategies, assuming that two (2) page frames areavailable to the program.i. LRUii. FIFOiii. OPT (Optimal)A virtual memory has a page size of 2K(words). There are eight pagesand four blocks. The associative memory page table contains the followingentries:Page Block0 32 15 26 0Make a list of all virtual addresses (In decimal) that will cause a page fault if used by the CPU.Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. a) Suppose that the OS uses a two-level page table. Draw the page table. (Assume that frames 7 through 221 are free, so you can allocate space for the page table there.) In addition, suppose that the page-table directory storage comprises a whole number of consecutive full frames. (For examples: if the directory entry is 2 bytes, the entry’s storage comprises 1 frame; if the directory entry is 260 bytes, the entry’s storage comprises 2 consecutive frames.) b) What is the size of the two-level page table c) Now, translate the virtual addresses shown in question I(e) to physical addresses for the two-level page table. Show how you obtain your answers. 0x0389 0xDF78 0x0245 0x8012
- Suppose a computer system uses 16-bit addresses for both its virtual and physical addresses. In addition, assume each page (and frame) has size 256 bytes. Could you hand draw the page table, if possible a) Suppose that the OS uses a two-level page table. Draw the page table. (Assume that frames 7 through 221 are free, so you can allocate space for the page table there.) In addition, suppose that the page-table directory storage comprises a whole number of consecutive full frames. (For examples: if the directory entry is 2 bytes, the entry’s storage comprises 1 frame; if the directory entry is 260 bytes, the entry’s storage comprises 2 consecutive frames.) b) What is the size of the two-level page tableThe following page table is for a system with 16-bit virtual and physical addresses and with 4,096-byte pages. The reference bit is set to 1 when the page has been referenced. Periodically, a thread zeroes out all values of the reference bit. A dash for a page frame indicates the page is not in memory. The page-replacement algorithm is localized LRU, and all numbers are provided in decimal. Page Page Frame Reference Bit 0 7 0 1 − 0 2 14 0 3 13 0 4 15 0 5 8 0 6 0 0 7 − 0 8 4 0 9 5 0 10 − 0 11 1 0 12 9 0 13 3 0 14 − 0 15 2 0 Convert the following virtual addresses (in hexadecimal) to the equivalent physical addresses. You may provide answers in either hexadecimal or decimal. Also set the reference bit for the appropriate entry in the page table. 0xE13C 0x5A97 0x59D8 0x1002 0xCCB1 Using the above addresses as a guide, provide an example of a…In a main memory-disk virtual storage system, the page size is 1KByte and the FIFO algorithm is used for page replacements. A given program has been allocated three page frames in the main memory and it makes the following 16 memory references when it starts executing (the addresses are given in decimal):500, 2000, 2500, 800, 4000, 1000, 5500, 1500, 2800, 400, 5000, 700, 2100, 3500, 900, 2400 Fill in the contents of the three page frames after each memory reference in a table and calculate the hit ratio. Hint: denote by 'a' the page consisting of locations 0 through 1023 in memory. Similarly, b: 1024-2047, c: 2048-3071, d: 3072-4095, e: 4096-5119 and f: 5120-6143. Round to three decimal places.
- The following page table is for a system with 16-bit virtual and physical addresses and with 4,096-byte pages. The reference bit is set to 1 when the page has been referenced. Periodically, a thread zeroes out all values of the reference bit. A dash for a page frame indicates the page is not in memory. The page-replacement algorithm is localized LRU, and all numbers are provided in decimal. Page Page Frame Reference Bit 0 7 0 1 15 0 2 10 0 3 13 0 4 14 0 5 -- 0 6 5 0 7 0 0 8 -- 0 9 9 0 10 1 0 11 11 0 12 2 0 13 − 0 14 3 0 15 8 0 Convert the following virtual addresses (in hexadecimal) to the equivalent physical addresses. You may provide answers in either hexadecimal or decimal. Show the calculation steps Also set the reference bit for the appropriate entry in the page table. 0xD551 0x8D17 0x33E2In a main memory-disk virtual storage system, the page size is 1KByte and the OPTIMAL algorithm is used for page replacements. A given program has been allocated three page frames in the main memory and it makes the following 16 memory references when it starts executing (the addresses are given in decimal):500, 2000, 2500, 800, 4000, 1000, 5500, 1500, 2800, 400, 5000, 700, 2100, 3500, 900, 2400 Fill in the contents of the three page frames after each memory reference in a table and calculate the hit ratio. Hint: denote by 'a' the page consisting of locations 0 through 1023 in memory. Similarly, b: 1024-2047, c: 2048-3071, d: 3072-4095, e: 4096-5119 and f: 5120-6143. Round to three decimal places.Assume a program of size 460 Bytes, and its virtual address sequence is as following 10 11 104 170 73 309 185 245 246 434 458 364 1.Suppose the page size is 100 Bytes, please write out the reference string. 2.Use the above reference string to calculate the number of page missing using the following algorithms: LRU, FIFO, OPT. We suppose the page frame is initially empty, and there is a total of 200 Bytes of physical memory.