Time left Given a process with address space of size 32 bytes and page size of 8 bytes, if the CPU asks to access a variable in page 1 using offset 2: What is the physical address of this variable in main memory? Page Table Page Frame 1 3. 40 16 50
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- 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.With virtual memory, when a program requests memory,the memory management system does which of the following? Select one: A. It grants the request as long as there is enough physical memory to accommodate B. It looks up the address in the page table. If the address is in memory, then it grants the request. C. It looks up the address in the page table. If the address is in memory, it grants the request. If the address is stored to disk, it writes a section of memory to disk and then transfers the requested virtual memory address from disk to main memory. D. It causes a deadlock to occur.Oeew s Sat DO D 4 Hene et e H P E Dei vi At D Metig eta O t TE Fie • REC In Net ASSIGNMENT 1. The table below presents a list of devices that are to be addressed in a certain memory space. They have been ordered in the manner in which S S they are to be addressed with the first component being placed on the upper end of memory, starting at address $000000. By considering the size each component, provide the start and end address using the appropriate hexadecimal value. l Device Description Device Name Amount of memory to address ROM Chip ROM 1 RAM 1 4KB RAM Chip 8KB ROM Chip ROM 2 4KB Peripheral PER 1 4 bytes Peripheral PER 2 2 bytes 2. Assume a very simple microprocessor with 12 address lines Let's assume we wish to implement all its memory space and we use 517x8 memory chigs. a. What is the size of the largest addressable memory? 1aa H Q O B CEOE
- Assembly Language x86: (Micro Macro): templet: .386.model flat, stdcall.stack 4096ExitProcess PROTO, dwExitCode: DWORD.data day BYTE 0month BYTE 0year WORD 0 .codemain PROC main ENDPINVOKE ExitProcess, 0END main Question: What bit string repersents April 1, 2024? Examples: Date: 00111 (year) 1100 (month) 10010 (day)00111 = 18, 1100 = 12, 10010 = 30, 1980 + 30 = 2010 = 2010 Dec 18mov ax, 00111110010010b; 2010 Dec 10; 30 12 18 DAY:mov dx, ax and dx, 0000000000011111bmov day, dl (18) ; 00111 Month: mov dx, ax and dx, 00000001111000000b shr dx, 5 ; 000000000000 1100 (12) mov month, dl Year:mov dx, axshr dx, 9 ; 011110and dx, 0000000001111111bmov year, dl (30) 10010Memory address Data According to the memory view given below, if RO = Ox20008002 then LDRSB r1, [r0, #-4] is executed as a result of r1 = ?(data overlay big endian)? Øx20008002 ØXA1 Øx20008001 ØXB2 Øx20008000 Øx73 ØX20007FFE ØXD4 ØX20007FFE Lütfen birini seçin: O A. R1 = 0X7F O B. R1 = Oxffffffd4 O C. R1 = Oxffffff7F O D. R1=0XD4000000 O E. R1 = 0XD4the oneratinn 3) Suppose an application program requires 2500H bytes of memory for its code, 2FOH bytes of memory for its data, and 2A0H bytes of memory for its stack. Shows how this application is positioned in a memory with a 20-bit address bus if locations 00000OH to 0A000H is reserved for the operating system (OS) softtware.
- Consider an operating system that uses 48-bit virtual addresses and 16KB pages. The system uses a hierarchical page table design to store all the page table entries of a process, and each page table entry is 4 bytes in size. What is the total number of pages that are required to store the page table entries of a process, across all levels of the hierarchical page table?When address binding is done at run time, Physical address space is A. the set of all addresses generated by the CPU B. the set of all addresses seen by the memory unitC. all of the above D. none of the aboveSuppose the OS on your computer uses the Buddy system for memory management. Initially the system has a 1 megabyte (1024K) block of memory available. Show the result of each request/release via successive figures similar to the one illustrated in the lecture slides. A: Request 25 K B: Request 500 K C: Request 70 K D:Request 100 K E: Request 40 K Release A F: Request 20 K Release B After memory is allocated to process F, how much internal fragmentation exist in the system.
- Consider the following assembly program of the basic computer as seen in class. What would be the value of variable X after executing the following instructions? Address Assembly ORG 2FE 2FE CLE 2FF LDA X 300 BSA rot 301 STA X 302 HLT х, НЕХ ЗЕАТ Y, HEX 3FA7 303 304 305 rot, HEX 0 306 CIL 307 CIL 308 CIL 309 CIL 30A BUN rot I END O 3FA7 O FA71 None of these ZF4E O FE9C FD38 O 7D3AGiven the following assembly code snippet, assume = $9000. Line #: memory address Assembly code 00: 00001000 LEA $6000, A1 01: 00001004 MOVE.W #%1000000000000001, (A1)+ 02: 00001008 MOVE.W #%1100000000000011, (A1)+ 03: 0000100C MOVE.W #%1110000000000111, (A1)+ 04: 00001010 MOVE.W #%1111000000001111, (A1)+ 05: 00001014 MOVE.W #%1111100000011111, (A1) 06: 00001018 LEA $6000, A1 07: 0000101C MOVE.B #0, DO 08: 00001020 LOOP1 MOVE.W (A1)+, D1 09: 00001022 AND.W #$00FF, D1 10: 00001026 LSR #1, D1 11: 00001028 MOVE.W D1, -(SP) 12: 0000102A ADDQ.B #1,DO 13: 0000102c CMP.B #5, DO 14: 00001030 BLT LOOP1 15: 00001032 LEA $6000, A1 16: 00001036 MOVE.B #0, DO 17: 0000103A LOOP2 MOVE.W (SP)+, (A1)+ 18: 0000103C ADDQ.B #1,DO 19: 0000103E CMP.B #5, DO 20: 00001042 BLT LOOP2 Answer the following questions, provide all values in hexadecimal. 1. What is the value of the PC while executing instructions #12 and #18? 2. What is the calculated displacement at instruction #14? Explain your answer. 3. What is…In 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.